WO2013134841A1 - Oil pump and oil filter for internal combustion engines - Google Patents

Oil pump and oil filter for internal combustion engines Download PDF

Info

Publication number
WO2013134841A1
WO2013134841A1 PCT/BR2013/000080 BR2013000080W WO2013134841A1 WO 2013134841 A1 WO2013134841 A1 WO 2013134841A1 BR 2013000080 W BR2013000080 W BR 2013000080W WO 2013134841 A1 WO2013134841 A1 WO 2013134841A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
interior
outlet
tubular body
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/BR2013/000080
Other languages
French (fr)
Inventor
Marcelo Aparecido GARCIA
Raphael RASCIO
Fernando Jun YOSHINO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Metal Leve SA
Original Assignee
Mahle Metal Leve SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle Metal Leve SA filed Critical Mahle Metal Leve SA
Publication of WO2013134841A1 publication Critical patent/WO2013134841A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • F01M2001/105—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements
    • F01M2001/1085—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements comprising non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • F01M2001/105—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements
    • F01M2001/1092—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements comprising valves bypassing the filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F01M2011/031—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means
    • F01M2011/035—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means comprising oil pumps

Definitions

  • the present invention refers to an oil pump, to be driven by the crankshaft of an internal combustion engine, to draw lubricant oil from the interior of the engine crankcase, forcing the oil to pass through an oil filter and to reach different internal engine parts which require lubrication.
  • the invention further refers to an oil filter to be operatively associated with an oil pump of an internal combustion engine.
  • oil pumps of the type considered herein and mentioned above, generally gear pumps, having a housing provided with an oil outlet in which is connected, generally by threads, the inlet of an oil filter, whose body is thus directly and externally affixed, in a removably way, to the pump housing .
  • This known type of oil pump construction requires the provision of a pressure control means defined by a relief valve, mounted in a bypass which connects the inlet with the outlet of the oil filter.
  • a pressure control means defined by a relief valve, mounted in a bypass which connects the inlet with the outlet of the oil filter.
  • the oil pumps of the type considered herein are also operatively associated with a check valve (or nonreturn valve) , disposed in the oil pumping circuit, so as to prevent the return of the oil, upon the engine stop, that is, upon the pump stop, from the interior of the filter to the inside of the engine crankcase.
  • a check valve or nonreturn valve
  • the oil filter will be full of oil, allowing the latter to be rapidly supplied to the internal engine parts. Otherwise, if the oil is allowed to return to the interior of the pump or crankcase upon the engine stop, at the time of an engine restart, the pump will have to fill up the oil filter with oil, which will be then sent to the engine parts to be lubricated. This delay in the lubrication, upon engine starts, tends to produce premature wear of the movable engine components which were not submitted to an adequate lubrication .
  • shielded-type oil filters which are directly removably coupled to the oil pump housing and present an inlet nozzle connected to the pump outlet, and an outlet nozzle connected to the system which conducts the oil to the interior of the engine .
  • the current shielded filters are constructed with a housing which lodges, in its interior and in a non- detachable way, a filtering element, a check (or nonreturn) valve, disposed in the region of the filter inlet nozzle, and a relief or bypass valve, establishing a . selective and direct fluid communication of the inlet nozzle of the filter with its outlet nozzle.
  • the whole filter including the housing, the filtering element, and the relief valve and check valve, has to be discarded and replaced by a new shielded filter.
  • all the filter material is discarded, increasing the amount of environmentally aggressive material, as well as the filter cost to the end consumer.
  • an oil pump for internal combustion engines comprising an oil filter, operatively associated with the relief and check valves, and presenting a filtering element which can be replaced, without requiring replacing the other filter component parts, generally defined by the housing and by said relief and check valves.
  • the present invention also has the object of providing an oil filter, operatively associated with relief and check valves, to be coupled to the housing of an oil pump for internal combustion engines and having, as one of its component parts, a filtering element which can be replaced, without requiring the replacement of its other component parts and of said relief and check valves .
  • an oil pump to be applied in internal combustion engines and presenting a housing provided with a dirty oil inlet; a dirty oil outlet; a dirty oil duct, having an inlet, opened to the dirty oil outlet, and an outlet; and, a clean oil duct, having an inlet opening and an outlet opening for conducting the clean oil to the interior of the engine.
  • the oil pump comprises: a check valve provided in the dirty oil duct, for allowing the oil to flow only towards the outlet opening of the dirty oil duct, preventing the oil from flowing in the opposite direction when the pump stops working; an oil filter having a tubular body removably affixed to the housing and opened to the outlet of the dirty oil duct, and a filtering element removably mounted in the interior of the tubular body and having a dirty oil inlet, opened to the interior of the tubular body, and a clean oil outlet, opened to the inlet opening of the clean oil duct; and a relief valve mounted in the interior, of the tubular body and communicating the interior of the latter with the clean oil outlet of the filtering element, when the hydraulic pressure, in the interior of the tubular body, reaches a certain value.
  • the construction proposed by the invention, and defined above, allows the filtering element to be the only periodically replaced component of the filter, preventing the filter housing, and the check and relief valves from being discarded, as it occurs with the shielded oil filters currently used in the internal combustion engines, in association with the oil pumps.
  • the proposed construction allows saving maintenance costs and produces a lower amount of waste generated in the maintenance stations.
  • Figure 1 is front view of the pump of the invention, provided with an oil filter, and with a relief valve and a check valve;
  • Figure 2 is a view similar to that of figure 1, but with part of the pump housing being transversely cut, to better illustrate the dirty oil duct and the clean oil duct;
  • Figure 3 is a longitudinal sectional view of the oil filter and relief valve, and a cross-sectional view of the check valve;
  • Figures 4 and 5 are longitudinal sectional views of the check valve, in the closed position and in the open position, respectively;
  • the present oil pump B is applied to internal combustion engines, to be driven, for example, by the engine crankshaft, by means of any adequate mechanical arrangement, which may be known or not in the prior art .
  • the oil pump B is of the type which has a housing 10 provided with a dirty oil inlet 11, maintained in fluid communication with the crankcase (not illustrated) of the internal combustion engine, so as to draw therefrom the lubricant oil to be pumped to the internal engine parts to be lubricated.
  • the housing 10 is also provided with a dirty oil outlet 12, through which the oil is discharged, in a pressurized condition, from a pumping chamber (not illustrated) of the oil pump B, which chamber can be constructed in different ways, whether known or not, but capable of meeting the operational requirements demanded by the engine design.
  • the type of oil pump B considered herein also presents a dirty oil duct 13, having an inlet 13a, open to the dirty oil outlet 12 of the housing 10, and an outlet 13b to be commented ahead, and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting clean oil to the interior of the engine .
  • the housing 10 of the oil pump B can be formed by different ways such as, for example, by injection of an aluminum alloy, and can be configured so that the dirty oil duct 13 and clean oil duct 14 are defined by respective passages formed in the interior of an extension of the housing 10.
  • the oil pump B comprises a check valve 20 provided in the interior of the dirty oil duct 13, in order to allow the oil, pressurized by the oil pump B, to flow only towards the outlet 13b of the dirty oil duct 13.
  • the check valve 20 presents a seat 21, defined in the interior of the dirty oil duct 13, and a sealing means 22 which is displaced, in the interior of the dirty oil duct 13, between a closed position, seated against the seat 21, interrupting the fluid communication between the dirty oil duct 13 and the dirty oil outlet 12 of the housing 10, upon the stop of the oil pump B, and an open position, spaced from the seat 21 and allowing said fluid communication upon operation of the oil pump B.
  • the dirty oil duct 13 is preferably rectilinear, with an end defining the inlet 13a of said duct and forming, with the dirty oil outlet 12 of the housing 10, the seat 21 of the check valve 20, and with an opposite end closed by a removable cap 15.
  • the outlet 13b of the dirty oil duct 13 is radially disposed downstream of the seat 21.
  • the sealing means 22 of the check valve 20 generally in the form of a cylindrical piston, carrying an end sealing ring 22a and formed in any adequate material, metallic or polymeric, is constantly forced to the closed position, for example, by means of a spring element 23, disposed in the interior of the dirty oil duct 13 and having opposite ends respectively seated on the cap 15 and on the sealing means 22.
  • the spring element 23 is dimensioned to be elastically deformed, allowing for the displacement of the sealing means 22 and for the opening of the seat 21 of the check valve 20, for the passage of the oil flow towards the outlet 13b of the dirty oil duct 13, upon the operation of the oil pump B.
  • the spring element 23 forces the sealing means 22, more specifically its end sealing ring 22a, to seat against the seat 21, preventing the oil from returning to the interior of the oil pump B and back to the engine crankcase.
  • the present pump further comprises a filter 30, having a tubular body 40 removably affixed to the housing 10 and opened to the outlet 13b of the dirty oil duct 13, and a filtering element 50 removably mounted in the interior of the tubular body 40 and having a radial inlet of a radial dirty oil inlet 50a, opened to the interior of the tubular body 40, and a clean oil outlet 50b, opened to the inlet opening 14a of the clean oil duct 14.
  • a relief valve 60 mounted in the interior of the tubular body 40 and communicating the interior of the latter with the clean oil outlet 50b of the filtering element 50, when the hydraulic pressure in the interior of the tubular body 40 reaches a certain value .
  • the filtering element 50 is in the form of a tubular cartridge constructed in a filtering material suitable for the application and presenting: closed and opposite annular end faces 51, with one of them being maintained seated against the housing 10 of the oil pump B; an external peripheral face 52, defining the radial dirty oil inlet 50a of the filtering element 50, from the interior of the tubular body 40 of the oil filter 30; and an internal peripheral face 53, which defines a filtered oil radial outlet 50c of the filtering element 50 and the lateral wall of a central duct 55, having an open outlet end 55b defining the clean oil outlet 50b of the filtering element 50 and coupled to the inlet opening 14a of the clean oil duct 14, and an opposite end 55a, in which is adapted the relief valve 60, defining a selective and direct fluid communication between the interior of the tubular body 40 of the oil filter 30 and the interior of the central duct 55, formed in the interior of the filtering element 50.
  • the base portion 41 and the lid portion 42 of the tubular body 40 of the oil filter 30 are provided with respective threads 41a, 42a, to be tightly engaged to each other, upon coupling the lid portion 42 to the base portion 41.
  • the tightness in the coupling region of the lid portion 42 with the base portion 41 can be better ensured with the provision of a sealing ring
  • the relief valve 60 comprises a valve body 61, constructed in metallic or polymeric material and having an inlet end 61a opened and seated against the lid portion 42 of the tubular body 40 of the oil filter 30, and an outlet end 61b, seated against the adjacent end annular face 51 of the filtering element 50 and defining a seat 62 opened to the interior of the central duct 55.
  • the relief valve 60 further comprises an obturator 63, operatively cooperating with the seat 62, and a spring element 64, forcing the obturator 63 against the seat 62 and maintaining the latter closed, while the hydraulic pressure in the interior of the tubular body 40 of the oil filter 30 is inferior to a certain value.
  • the relief valve 60 defines a bypass for the filtering element 50 and allows that, in case the latter is clogged, the oil being pumped by the oil pump B continues to flow through the oil filter 30, to the interior of the engine to be lubricated.
  • one aspect of the present invention refers to an " oil pump of the type which comprises a housing 10 provided with: a dirty oil inlet 11; a dirty oil outlet 12; a dirty oil duct 13, having an inlet 13a open to the dirty oil outlet 12, and an outlet 13b; and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting the clean oil to the interior of the engine.
  • an oil filter to be used together with an oil pump, of the type which comprises a housing 10, provided with a dirty oil inlet 11 and a dirty oil outlet 12 and operatively associated with a dirty oil duct 13, having an inlet 13a, opened to the dirty oil outlet 12, and an outlet 13b, and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting the clean oil to the interior of the engine.
  • the oil filter 30 presents the construction already previously defined in the present specification and exemplified in the enclosed drawings, and which may be applied to a housing incorporating, in its interior, the dirty oil duct 13 and the clean oil duct 14, or to a housing operatively associated, in any other manner, with said ducts .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Description

OIL PUMP AND OIL FILTER FOR INTERNAL COMBUSTION ENGINES
Field of the Invention
The present invention refers to an oil pump, to be driven by the crankshaft of an internal combustion engine, to draw lubricant oil from the interior of the engine crankcase, forcing the oil to pass through an oil filter and to reach different internal engine parts which require lubrication. The invention further refers to an oil filter to be operatively associated with an oil pump of an internal combustion engine.
Prior Art
There are well known in the art oil pumps of the type considered herein and mentioned above, generally gear pumps, having a housing provided with an oil outlet in which is connected, generally by threads, the inlet of an oil filter, whose body is thus directly and externally affixed, in a removably way, to the pump housing .
This known type of oil pump construction requires the provision of a pressure control means defined by a relief valve, mounted in a bypass which connects the inlet with the outlet of the oil filter. Thus, when there is an eventual obstruction of the oil filter and the consequent pressure increase at the pump outlet, the relief valve is automatically opened, allowing the pump to continue working, pumping oil to the interior of the engine through the relief valve mounted in the bypass of the oil filter.
The oil pumps of the type considered herein are also operatively associated with a check valve (or nonreturn valve) , disposed in the oil pumping circuit, so as to prevent the the return of the oil, upon the engine stop, that is, upon the pump stop, from the interior of the filter to the inside of the engine crankcase. Thus, upon an engine restart, the oil filter will be full of oil, allowing the latter to be rapidly supplied to the internal engine parts. Otherwise, if the oil is allowed to return to the interior of the pump or crankcase upon the engine stop, at the time of an engine restart, the pump will have to fill up the oil filter with oil, which will be then sent to the engine parts to be lubricated. This delay in the lubrication, upon engine starts, tends to produce premature wear of the movable engine components which were not submitted to an adequate lubrication .
Nowadays, there are used shielded-type oil filters, which are directly removably coupled to the oil pump housing and present an inlet nozzle connected to the pump outlet, and an outlet nozzle connected to the system which conducts the oil to the interior of the engine .
The current shielded filters are constructed with a housing which lodges, in its interior and in a non- detachable way, a filtering element, a check (or nonreturn) valve, disposed in the region of the filter inlet nozzle, and a relief or bypass valve, establishing a . selective and direct fluid communication of the inlet nozzle of the filter with its outlet nozzle.
Due to the shielded construction of the known oil filters, at the end of its useful life, the whole filter, including the housing, the filtering element, and the relief valve and check valve, has to be discarded and replaced by a new shielded filter. Thus, all the filter material is discarded, increasing the amount of environmentally aggressive material, as well as the filter cost to the end consumer.
Summary of the Invention As a function of the drawbacks mentioned above, it is one of the objects of the present invention to provide an oil pump for internal combustion engines, comprising an oil filter, operatively associated with the relief and check valves, and presenting a filtering element which can be replaced, without requiring replacing the other filter component parts, generally defined by the housing and by said relief and check valves.
The present invention also has the object of providing an oil filter, operatively associated with relief and check valves, to be coupled to the housing of an oil pump for internal combustion engines and having, as one of its component parts, a filtering element which can be replaced, without requiring the replacement of its other component parts and of said relief and check valves .
These and other objects of the present invention are associated with an oil pump, to be applied in internal combustion engines and presenting a housing provided with a dirty oil inlet; a dirty oil outlet; a dirty oil duct, having an inlet, opened to the dirty oil outlet, and an outlet; and, a clean oil duct, having an inlet opening and an outlet opening for conducting the clean oil to the interior of the engine.
According to the invention, the oil pump comprises: a check valve provided in the dirty oil duct, for allowing the oil to flow only towards the outlet opening of the dirty oil duct, preventing the oil from flowing in the opposite direction when the pump stops working; an oil filter having a tubular body removably affixed to the housing and opened to the outlet of the dirty oil duct, and a filtering element removably mounted in the interior of the tubular body and having a dirty oil inlet, opened to the interior of the tubular body, and a clean oil outlet, opened to the inlet opening of the clean oil duct; and a relief valve mounted in the interior, of the tubular body and communicating the interior of the latter with the clean oil outlet of the filtering element, when the hydraulic pressure, in the interior of the tubular body, reaches a certain value.
The construction proposed by the invention, and defined above, allows the filtering element to be the only periodically replaced component of the filter, preventing the filter housing, and the check and relief valves from being discarded, as it occurs with the shielded oil filters currently used in the internal combustion engines, in association with the oil pumps. The proposed construction allows saving maintenance costs and produces a lower amount of waste generated in the maintenance stations.
Brief Description of the Drawings
The invention will be described below, with reference to the enclosing drawings, given by way of example of a possible embodiment of the invention and in which: Figure 1 is front view of the pump of the invention, provided with an oil filter, and with a relief valve and a check valve;
Figure 2 is a view similar to that of figure 1, but with part of the pump housing being transversely cut, to better illustrate the dirty oil duct and the clean oil duct;
Figure 3 is a longitudinal sectional view of the oil filter and relief valve, and a cross-sectional view of the check valve; and
Figures 4 and 5 are longitudinal sectional views of the check valve, in the closed position and in the open position, respectively;
Description of the Invention As illustrated and already previously described, the present oil pump B is applied to internal combustion engines, to be driven, for example, by the engine crankshaft, by means of any adequate mechanical arrangement, which may be known or not in the prior art .
The oil pump B is of the type which has a housing 10 provided with a dirty oil inlet 11, maintained in fluid communication with the crankcase (not illustrated) of the internal combustion engine, so as to draw therefrom the lubricant oil to be pumped to the internal engine parts to be lubricated. The housing 10 is also provided with a dirty oil outlet 12, through which the oil is discharged, in a pressurized condition, from a pumping chamber (not illustrated) of the oil pump B, which chamber can be constructed in different ways, whether known or not, but capable of meeting the operational requirements demanded by the engine design.
The type of oil pump B considered herein also presents a dirty oil duct 13, having an inlet 13a, open to the dirty oil outlet 12 of the housing 10, and an outlet 13b to be commented ahead, and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting clean oil to the interior of the engine .
The housing 10 of the oil pump B can be formed by different ways such as, for example, by injection of an aluminum alloy, and can be configured so that the dirty oil duct 13 and clean oil duct 14 are defined by respective passages formed in the interior of an extension of the housing 10.
According to the invention, the oil pump B comprises a check valve 20 provided in the interior of the dirty oil duct 13, in order to allow the oil, pressurized by the oil pump B, to flow only towards the outlet 13b of the dirty oil duct 13. In the illustrated construction, the check valve 20 presents a seat 21, defined in the interior of the dirty oil duct 13, and a sealing means 22 which is displaced, in the interior of the dirty oil duct 13, between a closed position, seated against the seat 21, interrupting the fluid communication between the dirty oil duct 13 and the dirty oil outlet 12 of the housing 10, upon the stop of the oil pump B, and an open position, spaced from the seat 21 and allowing said fluid communication upon operation of the oil pump B.
The dirty oil duct 13 is preferably rectilinear, with an end defining the inlet 13a of said duct and forming, with the dirty oil outlet 12 of the housing 10, the seat 21 of the check valve 20, and with an opposite end closed by a removable cap 15. In this type of construction, the outlet 13b of the dirty oil duct 13 is radially disposed downstream of the seat 21.
As illustrated, the sealing means 22 of the check valve 20, generally in the form of a cylindrical piston, carrying an end sealing ring 22a and formed in any adequate material, metallic or polymeric, is constantly forced to the closed position, for example, by means of a spring element 23, disposed in the interior of the dirty oil duct 13 and having opposite ends respectively seated on the cap 15 and on the sealing means 22. The spring element 23 is dimensioned to be elastically deformed, allowing for the displacement of the sealing means 22 and for the opening of the seat 21 of the check valve 20, for the passage of the oil flow towards the outlet 13b of the dirty oil duct 13, upon the operation of the oil pump B. With the stop of the oil pump B and interruption of the hydraulic pressure against the sealing means 22, the spring element 23 forces the sealing means 22, more specifically its end sealing ring 22a, to seat against the seat 21, preventing the oil from returning to the interior of the oil pump B and back to the engine crankcase.
The present pump further comprises a filter 30, having a tubular body 40 removably affixed to the housing 10 and opened to the outlet 13b of the dirty oil duct 13, and a filtering element 50 removably mounted in the interior of the tubular body 40 and having a radial inlet of a radial dirty oil inlet 50a, opened to the interior of the tubular body 40, and a clean oil outlet 50b, opened to the inlet opening 14a of the clean oil duct 14.
Also making part of the present oil pump B, it is provided a relief valve 60 mounted in the interior of the tubular body 40 and communicating the interior of the latter with the clean oil outlet 50b of the filtering element 50, when the hydraulic pressure in the interior of the tubular body 40 reaches a certain value .
According to the exemplary construction, illustrated in the drawings, the filtering element 50 is in the form of a tubular cartridge constructed in a filtering material suitable for the application and presenting: closed and opposite annular end faces 51, with one of them being maintained seated against the housing 10 of the oil pump B; an external peripheral face 52, defining the radial dirty oil inlet 50a of the filtering element 50, from the interior of the tubular body 40 of the oil filter 30; and an internal peripheral face 53, which defines a filtered oil radial outlet 50c of the filtering element 50 and the lateral wall of a central duct 55, having an open outlet end 55b defining the clean oil outlet 50b of the filtering element 50 and coupled to the inlet opening 14a of the clean oil duct 14, and an opposite end 55a, in which is adapted the relief valve 60, defining a selective and direct fluid communication between the interior of the tubular body 40 of the oil filter 30 and the interior of the central duct 55, formed in the interior of the filtering element 50. The tubular body 40 of the oil filter 30 comprises: a base portion 41, incorporated to the housing 10 and having its interior kept in communication with the outlet 13b of the dirty oil duct 13; and a lid portion
42, in the form of a cylindrical cup, and to be tightly and removably coupled to the base portion 41. The base portion 41 and the lid portion 42 of the tubular body 40 of the oil filter 30 are provided with respective threads 41a, 42a, to be tightly engaged to each other, upon coupling the lid portion 42 to the base portion 41. The tightness in the coupling region of the lid portion 42 with the base portion 41 can be better ensured with the provision of a sealing ring
43, generally in elastomer and positioned between said lid portion 42 and base portion 41 and radially compressed therebetween.
In the illustrated construction, the relief valve 60 comprises a valve body 61, constructed in metallic or polymeric material and having an inlet end 61a opened and seated against the lid portion 42 of the tubular body 40 of the oil filter 30, and an outlet end 61b, seated against the adjacent end annular face 51 of the filtering element 50 and defining a seat 62 opened to the interior of the central duct 55. The relief valve 60 further comprises an obturator 63, operatively cooperating with the seat 62, and a spring element 64, forcing the obturator 63 against the seat 62 and maintaining the latter closed, while the hydraulic pressure in the interior of the tubular body 40 of the oil filter 30 is inferior to a certain value.
The relief valve 60 defines a bypass for the filtering element 50 and allows that, in case the latter is clogged, the oil being pumped by the oil pump B continues to flow through the oil filter 30, to the interior of the engine to be lubricated.
As already previously mentioned, one aspect of the present invention refers to an" oil pump of the type which comprises a housing 10 provided with: a dirty oil inlet 11; a dirty oil outlet 12; a dirty oil duct 13, having an inlet 13a open to the dirty oil outlet 12, and an outlet 13b; and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting the clean oil to the interior of the engine.
Other aspect of the invention refers to an oil filter to be used together with an oil pump, of the type which comprises a housing 10, provided with a dirty oil inlet 11 and a dirty oil outlet 12 and operatively associated with a dirty oil duct 13, having an inlet 13a, opened to the dirty oil outlet 12, and an outlet 13b, and a clean oil duct 14, having an inlet opening 14a and an outlet opening 14b for conducting the clean oil to the interior of the engine. The oil filter 30 presents the construction already previously defined in the present specification and exemplified in the enclosed drawings, and which may be applied to a housing incorporating, in its interior, the dirty oil duct 13 and the clean oil duct 14, or to a housing operatively associated, in any other manner, with said ducts .
The different constructive possibilities of the invention, as described herein, may be presented as individual solutions, or partially or totally combined to each other.
While only one possible embodiment of the invention has been illustrated herein, it should be understood that changes can be made in the form and arrangement of the component parts of the oil pump and oil filter, without departing from the scope of the invention, as defined in the claims that accompany the present disclosure .

Claims

1- An oil pump for internal combustion engines, having a housing (10) provided with: a dirty oil inlet (11); a dirty oil outlet (12); a dirty oil duct (13), having an inlet (13a) opened to the dirty oil outlet (12), and an outlet (13b); and a clean oil duct (14), having an inlet opening (14a) and an outlet opening (14b) for conducting the clean oil to the interior of the engine, said oil pump being characterized in that it comprises: a check valve (20) provided in the dirty oil duct (13) and which allows the oil to flow only towards the outlet (13b) of the dirty oil duct (13); an oil filter (30), having a tubular body (40) removably affixed to the housing (10) and opened to the outlet (13b) of the dirty oil duct (13), and a filtering element (50) removably mounted in the interior of the tubular body (40) and having a dirty oil inlet (50a), opened to the interior of the tubular body (40), and a clean oil outlet (50b) opened to the inlet opening (14a) of the clean oil duct (14); and a relief valve (60) mounted in the interior of the tubular body (40) and communicating the interior of the latter with the clean oil outlet (50b) of the filtering element (50), when the hydraulic pressure in the interior of the tubular body (40) reaches a certain value.
2- The oil pump, as set forth in claim 1, character! zed in that the dirty oil duct (13) is defined by a passage formed in the interior of the housing (10) and in whose interior it is incorporated a seat (21) for the check valve (20) and lodged a sealing means (22) which is displaced between a closed position, seated against the seat (21) and interrupting the fluid communication between the dirty oil duct (13) and the dirty oil outlet (12) of the housing (10) , upon the stop of the oil pump (B) , and an open position, spaced from the seat (21) and allowing said fluid communication upon operation of the oil pump (B) .
3- The oil pump, as set forth in claim 2, characterized in that the dirty oil duct (13) is rectilinear, with an end defining the inlet (13a) of said duct and forming, with the dirty oil outlet (12) of the housing (10), the seat (21) of the check valve (20), and with an opposite end closed by a removable cap (15), the outlet (13b) of the dirty oil duct (13) being radially disposed immediately downstream of the seat (21) .
4- The oil pump, as set forth in claim 3, characterized in that the sealing means (22) is constantly forced to a closed position, by means of a spring element (23) disposed in the interior of the dirty oil duct (13) and having opposite ends respectively seated on the cap (15) and on the sealing means (22) .
5- The oil pump, as set forth in any of claims 1 to 4, characterized in that the clean oil duct (14) is defined by a passage formed in the interior of the housing (10), and in that the filtering element (50) takes the form of a tubular cartridge and presents: closed and opposite annular end faces (51), with one of them being maintained seated against the housing (10) of the oil pump (B) ; an external peripheral face (52), defining the radial dirty oil inlet (50a) of the filtering element (50), from the interior of the tubular body (40) of the oil filter (30); and an internal peripheral face (53), which defines a filtered oil radial outlet (50c) of the filtering element (50) and the lateral wall of a central duct (55), having an open outlet end (55b) defining the clean oil outlet (50b) of the filtering element (50) and coupled to the inlet opening (14a) of the clean oil duct (14), and an inlet opposite end (55a) in which is adapted the relief valve (60), which defines a selective and direct fluid communication between the interior of the tubular body (40) of the oil filter (30) and the interior of the central duct (55) of the filtering element (50).
6- The oil pump, as set forth in claim 5, characterized in that the tubular body (40) of the oil filter (30) comprises: a base portion (41), incorporated to the housing (10) and having its interior maintained in communication with the outlet (13b) of the dirty oil duct (13); and a lid portion (42), in the form of a cylindrical cup and to be tightly and removably coupled to the base portion (41) .
7- The oil pump, as set forth in claim 6, characterized in that the base portion (41) and the lid portion (42) of the tubular body (40) of the oil filter (30) are provided with respective threads (41a, 42a) to be tightly engaged to each other, upon coupling the lid portion (42) to the base portion (41).
8- The oil pump, as set forth in any of claims 6 or 7, characterized in that the relief valve (60) comprises: a valve body (61) having an inlet end (61a), opened and seated against the lid portion (42) of the tubular body (40) of the oil filter (30), and an outlet end (61b), seated against the adjacent end annular face (51) of the filtering element (50) and defining a seat (62) opened to the interior of the central duct (55); an obturator (63) operatively cooperating with the seat (62); and a spring element (64) forcing the obturator (63) against the seat (62), maintaining the latter closed, while the hydraulic pressure in the interior of the tubular body (40) of the oil filter (30) is inferior to a certain value.
9- An oil filter for internal combustion engines, to be coupled to an oil pump of the type which comprises a housing (10), provided with a dirty oil inlet (11) and with a dirty oil outlet (12) and operatively associated with: a dirty oil duct (13), having an inlet (13a), opened to the dirty oil outlet (12), and an outlet (13b); and a clean oil duct (14), having an inlet opening (14a) and an outlet opening (14b) for conducting the clean oil to the interior of the engine, said oil filter (30) being characterized in that it comprises: a tubular body (40) removably affixed to the housing (10) and opened to the outlet (13b) of the dirty oil duct (13), and a filtering element (50), removably mounted in the interior of the tubular body (40) and having a dirty oil inlet (50a), opened to the interior of the tubular body (40), and a clean oil outlet (50b) , opened to the inlet opening (14a) of the clean oil duct (14); and a relief valve (60) mounted in the interior of the tubular body (40) and communicating the interior of the latter with the clean oil outlet (50b) of the filtering element (50), when the hydraulic pressure in the interior of the tubular body (40) reaches a certain value.
10- The oil filter, as set forth in claim 9, characterized in that the filtering element (50) takes the form of a tubular cartridge presenting: closed and opposite annular end faces (51), with one of them being maintained seated against the housing (10) of the oil pump (B) ; an external peripheral face (52), defining the radial dirty oil inlet (50a) of the filtering element (50), from the interior of the tubular body (40); and an internal peripheral face (53), which defines a filtered oil radial outlet (50c) of the filtering element (50) and the lateral wall of a central duct (55), having an open outlet end (55b), defining the clean oil outlet (50b) of the filtering element (50) and being coupled to the inlet opening (14a) of the clean oil duct (14), and an opposite end (55a) in which is adapted the relief valve (60), defining a selective and direct fluid communication between the interior of the tubular body (40) of the oil filter (30) and the interior of the central duct (55) formed in the interior of the filtering element (50) .
11- The oil filter, as set forth in claim 10, characterized in that the tubular body (40) comprises: a base portion (41), incorporated to the housing (10) and having its interior maintained in communication with the outlet (13b) of the dirty oil duct (13); and a lid portion (42), in the form of a cylindrical cup and to be tightly and removably coupled to the base portion (41) .
12- The oil filter, as set forth in claim 11, characterized in that the base portion (41) and the lid portion (42) of the tubular body (40) are provided with respective threads (41a, 42a) to be tightly engaged to each other, upon coupling the lid portion (42) to the base portion (41) .
13- The oil pump, as set forth in any of claims 11 or 12, characterized in that the relief valve (60) comprises: a valve body (61) having an inlet end (61a), opened and seated against the lid portion (42) of the tubular body (40) of the oil filter (30), and an outlet end (61b), seated against the adjacent end annular face (51) of the filtering element (50) and defining a seat (62) opened to the interior of the central duct (55); an obturator (63) operatively cooperating with the seat (62); and a spring element (64) forcing the obturator (63) against the seat (62), maintaining the latter closed, while the hydraulic pressure in the interior of the tubular body (40) of the oil filter (30) is inferior to a certain value.
PCT/BR2013/000080 2012-03-13 2013-03-13 Oil pump and oil filter for internal combustion engines Ceased WO2013134841A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR1020120056011 2012-03-13
BR102012005601A BR102012005601A2 (en) 2012-03-13 2012-03-13 OIL PUMP AND OIL FILTER FOR INTERNAL COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
WO2013134841A1 true WO2013134841A1 (en) 2013-09-19

Family

ID=49160165

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2013/000080 Ceased WO2013134841A1 (en) 2012-03-13 2013-03-13 Oil pump and oil filter for internal combustion engines

Country Status (2)

Country Link
BR (1) BR102012005601A2 (en)
WO (1) WO2013134841A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015015370A1 (en) 2015-11-28 2017-06-01 Daimler Ag Filter device for an oil filter of a motor vehicle and oil filter
WO2019133327A1 (en) * 2017-12-27 2019-07-04 Cummins Filtration Ip, Inc. Systems for reducing backpressure in filters including a pumping assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992017262A1 (en) * 1991-03-28 1992-10-15 Knecht Filterwerke Gmbh Filter for liquids, in particular internal-combustion engine lubricant oils
JPH06193418A (en) * 1992-12-25 1994-07-12 Kubota Corp Vertical engine lubricator with oil filter
US5934241A (en) * 1996-05-17 1999-08-10 Mercedes-Benz Ag Internal-combustion engine
DE10345596A1 (en) * 2003-09-29 2005-04-28 Mahle Filtersysteme Gmbh Combination filling and regurgitation prevention valve for engine oil circuit with filter has filler cap with non-return valve feeding fresh oil into oil cooler filter and engine sump
DE10344665A1 (en) * 2003-09-25 2005-05-12 Bosch Gmbh Robert Oil status sensor e.g. for motor vehicle, has sensor fitted to oil module and provides lubrication to internal-combustion engine and for steering gear

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992017262A1 (en) * 1991-03-28 1992-10-15 Knecht Filterwerke Gmbh Filter for liquids, in particular internal-combustion engine lubricant oils
JPH06193418A (en) * 1992-12-25 1994-07-12 Kubota Corp Vertical engine lubricator with oil filter
US5934241A (en) * 1996-05-17 1999-08-10 Mercedes-Benz Ag Internal-combustion engine
DE10344665A1 (en) * 2003-09-25 2005-05-12 Bosch Gmbh Robert Oil status sensor e.g. for motor vehicle, has sensor fitted to oil module and provides lubrication to internal-combustion engine and for steering gear
DE10345596A1 (en) * 2003-09-29 2005-04-28 Mahle Filtersysteme Gmbh Combination filling and regurgitation prevention valve for engine oil circuit with filter has filler cap with non-return valve feeding fresh oil into oil cooler filter and engine sump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015015370A1 (en) 2015-11-28 2017-06-01 Daimler Ag Filter device for an oil filter of a motor vehicle and oil filter
WO2017088962A1 (en) 2015-11-28 2017-06-01 Daimler Ag Filter cartridge for an oil filter of a motor vehicle, and oil filter
US11504656B2 (en) 2015-11-28 2022-11-22 Daimler Ag Oil filter and filter cartridge for an oil filter of a motor vehicle
WO2019133327A1 (en) * 2017-12-27 2019-07-04 Cummins Filtration Ip, Inc. Systems for reducing backpressure in filters including a pumping assembly

Also Published As

Publication number Publication date
BR102012005601A2 (en) 2013-11-19

Similar Documents

Publication Publication Date Title
CN104819028B (en) For the lubricating system of internal combustion engine, oil disc device and internal combustion engine
EP3004647B1 (en) Variable displacement lubricant pump
US10655580B2 (en) High pressure fuel supply pump
CN104541059A (en) Variable-capacity oil pump and oil supply system using same
JP2009533598A (en) Improved vacuum pump
KR20140074915A (en) Pre-compression dual spring pump control
CN104813029A (en) Variable displacement lubricant pump
WO2013134841A1 (en) Oil pump and oil filter for internal combustion engines
CN204371444U (en) The fluid filter of internal-combustion engine
CN110345371B (en) Throat seal for self-lubricating pump
EP2929171B1 (en) Valve mechanism for an internal combustion engine, internal combustion engine and automotive vehicle
CN106050356B (en) Internal combustion engine, lubrication system and oil filter
CN110691903B (en) Fuel pump for supplying fuel to internal combustion piston engine
WO2016067955A1 (en) Lubricating oil supply mechanism for turbocharger
CN110691904B (en) High Pressure Fuel Pump Assembly for Internal Combustion Piston Engines
CN208138074U (en) A kind of injection pump of engine
KR102613583B1 (en) Variable oil pump
EP3601778B1 (en) A fuel pump for supplying fuel to an internal combustion piston engine
CN104848025A (en) Circular inside-release oil pump
CN114776582A (en) Variable displacement vane pump with improved pressure control and range
GB2507975A (en) Bypass valve
CN204677427U (en) The laggard short that ejects lubricates three screw pump
WO2013174610A1 (en) Pressure limiting valve and fuel injecion plant for an internal combustion engine comprising said pressure limiting valve
WO2019111271A1 (en) Variable pressure oil pump
JP2016089633A (en) Flow control valve

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13718285

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13718285

Country of ref document: EP

Kind code of ref document: A1