EP1236895A1 - Pompe électromagnetique - Google Patents

Pompe électromagnetique Download PDF

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Publication number
EP1236895A1
EP1236895A1 EP02004697A EP02004697A EP1236895A1 EP 1236895 A1 EP1236895 A1 EP 1236895A1 EP 02004697 A EP02004697 A EP 02004697A EP 02004697 A EP02004697 A EP 02004697A EP 1236895 A1 EP1236895 A1 EP 1236895A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
casing
piston element
oil
chamber
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.)
Granted
Application number
EP02004697A
Other languages
German (de)
English (en)
Other versions
EP1236895B1 (fr
Inventor
Pierluigi Dell'orto
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.)
Dell Orto SpA
Original Assignee
Dell Orto SpA
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 Dell Orto SpA filed Critical Dell Orto SpA
Publication of EP1236895A1 publication Critical patent/EP1236895A1/fr
Application granted granted Critical
Publication of EP1236895B1 publication Critical patent/EP1236895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • 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
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the present invention concerns an electromagnetically operated pump for the precise and controlled feeding of oil to two-stroke internal-combustion engines.
  • the present invention concerns a pump of this type, with the object to improve its characteristics as far as structural simplicity, and metering precision and easiness, all being very important in view of the special use for which said pump is intended.
  • the pump according to the invention - comprising in a casing: a cylinder; a piston element with a through pipe, axially movable in said cylinder; an electromagnetic coil external to the cylinder, to control the movements of the piston element against the action of spring means; a pumping and metering chamber for the oil to be fed, at one end of the cylinder; and valve means housed in said casing, close to said end, one of said means cooperating with said piston element - is characterized in that the stroke of the piston element is limited, on one side, by the plane surface of the casing onto which abuts the cylinder in correspondence of said chamber and, on the other side, by the inner surface of a cup bearing, with a projecting peripheral edge thereof, onto the end of the cylinder opposite to that of the chamber, stout spring means being interposed between said cup and the casing to stop the cylinder therein.
  • the pump according to the invention comprises a casing 1, containing a cylinder 2 and a piston element 3, axially movable into the cylinder 2 and crossed by a pipe 4 connected with branches 5 and 6 - for oil inlet and outlet respectively - of the casing 1.
  • a chamber 7 for pumping the oil to be fed delimited by the plane surface 8 of the casing 1, onto which bears the cylinder 2, and by the bottom end 9 of the piston element 3.
  • an electromagnetic coil 10 fed with pulse current in strict correlation with the running of the two-stroke engine to be equipped with the pump.
  • said coil 10 When energized, said coil 10 controls the movements of the piston element 3 towards the chamber 7, against the action of a spring 11 which acts in an opposite sense when the coil 10 is de-energized.
  • Two ball valves 12, 13, are provided in the casing 1 close to the oil pumping chamber 7, the first of said valves cooperating with the bottom end 9 of the piston element 3, in correspondence of the outlet of the pipe 4.
  • the valve 12 when the piston element 3 is moved by the electromagnetic coil 10, the valve 12 is closed while the valve 13 opens; viceversa, the valve 13 closes when the piston element 3 is moved by the spring 11 and while the valve 12 opens.
  • an abutment 14 is formed on the piston element 3, close to the end opposite to the bottom end 9, said abutment 14 being apt to cooperate with the inner surface 15 of a cup 16, apt to stop the cylinder 2 into the casing 1.
  • Said cup 16 bears in fact with its projecting peripheral edge 17 onto said cylinder 2 and is pressed against the same by a stout Belleville spring 18 engaging the plane surface 19 of the casing 1.
  • the stroke of the piston element 3 into the cylinder 2 is thereby limited by the cooperation, on one side, between the abutment 14 and the inner surface 15 of the cup 16, and on the other side, between the bottom end 9 of the piston element 3 and the plane surface 8 of the casing 1.
  • Said stroke determines the capacity (or volume) of the pumping chamber 7 and the metering of the oil to be fed.
  • the figure of the accompanying drawing illustrates the pump according to the invention with the chamber 7 full of oil, the piston element 3 having its bottom end 9 spaced apart from the plane surface 8 of the casing 1 and the abutment 14 in contact with the inner surface 15 of the cup 16.
  • the coil 10 When, in operation, the coil 10 is energized, the piston element 3 moves towards the plane surface 8 compressing the oil into the chamber 7, while the valve 12 closes the pipe 4 into which flows the oil let in through the branch 5.
  • the oil pressure in the chamber 7 opens the valve 13 and the oil is fed through the branch 6 into the engine.
  • the pumping of the oil is carried out by energizing the electromagnetic coil 10.
  • the piston element 3 stops, with the chamber 7 empty, when the bottom element 9 thereof cooperates with the plane surface 8 of the casing 1.
  • the pump described heretofore has a very simple structure and its working is very reliable; but, above all, it can be very easily adapted, at extremely reduced costs, to the most different requirements of capacity: the volume of the oil pumping and metering chamber 7 (namely, the amount of oil being fed at each piston stroke C) can in fact be easily adjusted, not only by acting on the axial position of the abutment 14 of the piston element 3, but also by simply replacing the existing cup 16 with a similar cup in which the projection of its peripheral edge 17 differs from the inner surface 15 thereof, or even by varying with a simple mechanical operation the projection in the cup 16 being used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)
EP20020004697 2001-03-01 2002-02-28 Pompe électromagnetique Expired - Lifetime EP1236895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001MI000420A ITMI20010420A1 (it) 2001-03-01 2001-03-01 Pompa comandata da elettromagnete
ITMI010420 2001-03-01

Publications (2)

Publication Number Publication Date
EP1236895A1 true EP1236895A1 (fr) 2002-09-04
EP1236895B1 EP1236895B1 (fr) 2006-06-28

Family

ID=11447070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020004697 Expired - Lifetime EP1236895B1 (fr) 2001-03-01 2002-02-28 Pompe électromagnetique

Country Status (4)

Country Link
EP (1) EP1236895B1 (fr)
DE (1) DE60212743T2 (fr)
ES (1) ES2266326T3 (fr)
IT (1) ITMI20010420A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874961A1 (fr) * 2004-09-06 2006-03-10 Peugeot Motocycles Sa Systeme de commande du fonctionnement d'une pompe electrique d'huile de lubrification d'un moteur a deux temps

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006630B4 (de) 2009-01-29 2016-12-15 Continental Automotive Gmbh Hochdruckpumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306842A (en) * 1978-06-28 1981-12-22 Jidosha Kiki Co., Ltd. Electromagnetic pumps
EP0288216A1 (fr) * 1987-04-15 1988-10-26 Eaton S.A.M. Pompe électrique à liquides
US5492449A (en) * 1991-09-11 1996-02-20 Lang Apparatebau Gesellschaft Mit Beschraenkter Haftung Piston diaphragm pump for the delivery of liquids in doses
EP0953764A1 (fr) * 1998-04-27 1999-11-03 MAGNETI MARELLI S.p.A. Pompe volumétrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306842A (en) * 1978-06-28 1981-12-22 Jidosha Kiki Co., Ltd. Electromagnetic pumps
EP0288216A1 (fr) * 1987-04-15 1988-10-26 Eaton S.A.M. Pompe électrique à liquides
US5492449A (en) * 1991-09-11 1996-02-20 Lang Apparatebau Gesellschaft Mit Beschraenkter Haftung Piston diaphragm pump for the delivery of liquids in doses
EP0953764A1 (fr) * 1998-04-27 1999-11-03 MAGNETI MARELLI S.p.A. Pompe volumétrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874961A1 (fr) * 2004-09-06 2006-03-10 Peugeot Motocycles Sa Systeme de commande du fonctionnement d'une pompe electrique d'huile de lubrification d'un moteur a deux temps

Also Published As

Publication number Publication date
EP1236895B1 (fr) 2006-06-28
DE60212743T2 (de) 2007-06-28
DE60212743D1 (de) 2006-08-10
ITMI20010420A1 (it) 2002-09-01
ES2266326T3 (es) 2007-03-01

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