JPH0227112A - Nozzle assembly for cooling crown of piston for internal combustione engine - Google Patents

Abstract

PURPOSE: To simplify the structure of a nozzle assembly by providing housing means having an inlet cylinder with a pair of side walls, arranging a plate means between the side walls and forming a nozzle orifice in the plate means. CONSTITUTION: Housing means 30 having an inlet cylinder 42 is provided with a pair of skirt portions 36, 38. An intermediate passage plate 40 and a cover plate 50 are arranged between the skirt portions 36 and 38. A nozzle passage 48 and a nozzle orifice 47 are formed in the intermediate passage plate 40. The inlet cylinder 42 is provided with a check valve, whereby oil is injected from the nozzle orifice 47 to the underside of a crown of a piston when an oil pressure exceeds a predetermined value. As a consequence, the structure of a nozzle assembly is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for cooling a piston of an internal combustion engine.
More particularly, the present invention relates to an oil spray nozzle for a crankcase used to cool a piston.

BACKGROUND OF THE INVENTION In internal combustion engines, particularly diesel engines, oil and lubrication systems are used to remove heat from and cool the piston and cylinder areas. In one conventional cooling system, a tubular nozzle extends into the crankcase of an internal combustion engine and is oriented to direct a spray of oil onto the underside of the crown of the piston. The tubular nozzle communicates with an oil supply gear gallery. A check valve within the nozzle selectively prevents oil from being sprayed by the nozzle until the oil pressure exceeds a preset threshold. An oil spray nozzle is provided within each cylinder of the internal combustion engine.

SUMMARY OF THE INVENTION Briefly stated, the present invention, in its preferred form, comprises:
This is an oil spray nozzle for the crankcase that cools the pistons of internal combustion engines. The oil spray nozzle has an efficient and inexpensive sandwich-type construction that allows it to be efficiently installed in the crankcase of an internal combustion engine. The oil spray nozzle in some embodiments incorporates an internal filter system to ensure reliable operation.

In one embodiment, the housing member defines a laterally projecting inlet cylinder, the cylinder extending between a first end (nozzle end) and a second end of the housing member. An entrance hole has been defined. The housing member also includes a pair of laterally spaced side walls. A cover plate is received between the side walls and secured to the housing member by folding the extensions of the side walls.

The cover plate cooperates with the housing member to define a nozzle passageway extending from the cylinder to a nozzle orifice located at the nozzle end. A check valve including a valve member and a spring is received within the cylinder and captured between the housing member and the cover plate. The valve member is spring biased to prevent fluid from passing through the nozzle passageway when the fluid pressure is below a preset threshold. The valve member is also displaceable such that fluid passes through the nozzle passageway and is injected through the nozzle orifice.

An intermediate plate is sandwiched between the housing member and the cover plate. The intermediate plate, housing member, and cover plate cooperate with each other to define a nozzle passage.

The spring is also used to act as a filter for fluid passing between the inlet hole and the nozzle orifice. The housing member and cover plate also have a row of projections that cooperate with each other to define an internal edge filter within the nozzle passageway.

In one embodiment, a leaf spring is locked at one end between the housing and the cover plate to allow fluid to pass through the nozzle when the fluid pressure is below a preset threshold. It is designed to prevent The cover plate has an arcuate cross-sectional shape, and the housing member has a flat portion that cooperates with the arcuate portion to define a fluid passageway of the nozzle. The cover plate has a curved end adjacent the nozzle orifice to define a deflector.

In another embodiment, a tubular nozzle tip member is connected to a holder member formed of sheet metal, and the combination curves the flange of the housing or cover plate portion of the holder member. It is secured to the nozzle assembly by tightening. The nozzle tip has a D-shaped cross-section at one end for attachment to a holder member, the holder member defining a passageway for receiving the nozzle tip and supplying oil to the discharge orifice of the nozzle tip. Preferably, the cover plate includes a groove having a similar cross-sectional shape.

In some embodiments of the oil spray nozzle, the nozzle body is formed from two pieces. One member is stamped or coined in a fineblanking or semi-shirring process to form a recess. The depression partially defines the cylindrical portion of the passageway extending from the nozzle inlet to the orifice. The depression and passageway have a rectangular cross-sectional shape at the orifice to control the spray pattern of the nozzle.

One object of the present invention is to provide a new and improved oil spray nozzle for cooling the piston of an internal combustion engine by spraying lubricant and directing the spray to the underside of the crown of the piston.

Another object of the present invention is to provide a new and improved crankcase oil spray nozzle that is efficient and inexpensive in construction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below by way of example embodiments with reference to the accompanying figures.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, an oil spray nozzle according to the invention is indicated generally at 10. An oil spray nozzle 10 is incorporated into an internal combustion engine 12 and is oriented to spray oil onto the underside of the crown of a piston 16 within the cylinder 10 . The oil spray nozzle 10 is installed in a crankcase 20 of an internal combustion engine, and supplies pressurized oil to an oil supply passage or a gear rally 2 of the crankcase.
2. When the oil pressure exceeds a preset threshold pressure, the pressurized oil passes through the nozzle 10 and is injected onto the underside of the piston crown.

The nozzle thus serves to cool the crown of the piston during operation of the internal combustion engine.

For purposes of better illustrating the invention, connecting rods and other engine components have been omitted from FIG. The position and low external dimensions of the nozzle are selected so as not to interfere with the movement path of the connecting rod or counterweight. Preferably, the oil spray nozzle 10 is provided corresponding to each piston of the internal combustion engine.

2-4, an oil spray nozzle 10 according to one embodiment has a sandwich construction of stamped components. The oil spray nozzle 10 includes a housing 30, an intermediate passage plate 40,
It includes a sandwich-like body structure consisting of three components including a cover plate 50 and a cover plate 50. The three components may be formed from metal materials by stamping or the like.

Housing 30 defines the nozzle profile and provides structure for securing the nozzle components in an assembled condition. The housing begins with a plate with nose-shaped end tabs 32 and a pair of skirt portions 36 laterally spaced apart from each other to form side walls and secure flanges as will be described in detail below.
and 38. An integrally extending cylinder 42 forms the base plate 3 of the housing.
1 is formed in the center of the plate so as to protrude from the plate. The cylinder 42 is substantially cylindrical and has a comb-shaped end defining an inlet hole 47 for the nozzle.

A hole 46 is formed in the base plate 31 at a position equidistant from the skirt parts 36 and 38 and spaced apart from the cylinder 42 in the longitudinal direction.

Base plate 31 extending between skirt portions 36 and 38 functions as a receiving tray for a substantially flat intermediate passage plate 40. The passage plate 40 is substantially flat and has a similar outer shape to the base plate 31 of the nodding.

The passage plate 40 is received within the housing and abuts the base plate 31 in surface contact with each other. The intermediate passage plate 40 has a cylindrical hole 43 and a nozzle passage 48.
The nozzle passage 48 extends from the hole 43 to a narrow nozzle orifice 47 formed at the front end of the passage plate 40. Hole 43)S
It is substantially aligned with the cylinder 42 formed in the housing. The nozzle passage 48 extends obliquely from the hole 43 to the nozzle orifice 47. The passageway 48 is tapered at its outlet end, thereby forming a nozzle orifice 47. Passage plate 40 has a nose-shaped end that substantially matches the shape of the nose-shaped end of base plate 31 .

Plate 40 has a hole 46' formed therein that is substantially similar in size and shape to hole 46. The dimensions of the cylindrical bore 43, the nozzle orifice 47 and the passage 48 are precisely defined by the inner edge of the passage plate 40.

Cover plate 50 is substantially flat and has a contour substantially similar to the contour of passageway plate 40 . Cover plate 50 also has a hole 46'' having dimensions substantially similar to and substantially aligned with the dimensions of holes 46 and 46. and the play 1-40 engages the base plate 31,
Because of this, the plates are in substantial three-layer surface contact relationship. The skirts 36 and 38 engage the cover plate 50 to secure the three plates in a sandwich-like structure. retaining flange 3
7 and 3. The north end of cover plate 50 extends beyond the corresponding nose end of the housing. The tip of the nose-shaped end of the cover plate and the corresponding portion of the nose-shaped end of the passage plate are bent to form a nozzle hole deflector 56 which deflects the oil spray towards the crown. The shape of the deflector 56 is selected to provide a spray pattern that fits a given crankcase and piston configuration.

The cover plate, the passageway plate, and the first nozzle cooperate with each other to define an internal nozzle passageway, which passageway is substantially configured such that the fluid flow path extends from the artificial hole 44 through the nozzle first nofice 47. to prevent fluid leakage. In the preferred use of the nozzle as a cooling device for a piston, the nozzle passageway and fluid flow path through the nozzle need not be hermetically sealed.

A check valve assembly including a ball valve 60 and a spring 62 is attached to the cylinder 4.
2 and captured between the housing 30 and the cover plate 50.

Ball valve 60 is biased to seat in an internal valve seat proximate the end of the cylinder to close artificial hole 44.

After inserting the valve 60 and spring 62 into the cylinder 42, the skirts 36 and 38 are curved around the passage plate and cover plate so that the ball valve 60 and spring 62
A check valve assembly including a check valve assembly is received and retained. The check valve assembly functions to close the inlet hole and prevent passage of pressurized oil until the oil pressure exceeds a preset threshold pressure. When the oil pressure exceeds the threshold pressure,
Oil communicates with inlet hole 44 and nozzle passage 48, which injects oil through nozzle orifice 47. The threshold pressure is defined by the spring force of spring 62. Base play! - substantially identical circular holes 46, 46' formed in the passage plate and the cover plate;
46" define holes for fastening elements extending transversely through the flat sandwich-like nozzle body in alignment with each other. Thus, the nozzle 10 is secured into the crankcase by a conventional fastening element 68. The nose-shaped ends of the passage plate and cover plate are slightly curved to properly orient the nozzle relative to the crown of the piston.

One modified embodiment of an oil spray nozzle is shown generally at 11 in FIGS. 5 and 6. Nozzle 11 is substantially identical in form and function to nozzle 10, except for modifications described below. Due to the low profile structure,
The outlet end of the nozzle can be curved away from the cylinder block of the internal combustion engine so as to receive the end of the skirt of the piston at the dead center of the piston's movement when the nozzle is installed. Furthermore, the housing of the nozzle may have a shape with legs that are significantly curved so as to ensure sufficient clearance between the outlet of the nozzle and the connecting rod of the piston. The pivoting path of the connecting rod of the piston is indicated by 24 in FIG.

In FIG. 7, spring 62 is configured to function as an auxiliary filter. The spring 62 is configured to allow oil to flow from the radially outer portion to the central inner portion, as schematically shown by the flow path arrows in the figure. The spacing between each turn of the spring is sized to prevent the passage of particulate matter. The wall defining the hole 45 in the intermediate plate is curved to form a vertical shoulder supporting the end turns of the spring 62. A passage 48' is defined by a recess of a predetermined shape in the cover plate so as to form a fluid passage from the hole 45 to the nozzle orifice 47 via passages 48' and 48.

Another filter structure for nozzle 10 is shown in FIGS. 2 and 3. A plurality of rows of protrusions 39 and 59 are provided on the opposing inner surfaces of the base plate 31 and the cover plate 50 of the housing, respectively.
These protrusions cooperate with each other to form an internal edge filter of the nozzle that filters particulate matter and prevents it from adhering to the nozzle orifice 47. When particulate matter becomes attached to the nozzle orifice, the spray characteristics of the nozzle are significantly changed. In some situations, the nozzle orifice can become completely blocked by particulate matter. The spacing between the opposing surfaces of the protrusions 39 and 59 is dimensioned to form a throttle passage.

Yet another internal edge filter structure that may be incorporated into nozzle 10 is shown in FIGS. 13 and 14. The passage from the inlet hole to the nozzle orifice 47 includes a pair of longitudinally extending passage segments 72 and 74 that are laterally offset from each other. Passage segments 72 and 74 are separated from each other by ridges 76. The oil flow path (indicated generally by the arrow) to the nozzle orifice is substantially across the ridge 76 and through the gap between the ridge and the base plate 31 of the housing. The gap between the upper surface of the ridge 76 and the lower surface of the base plate 31 is sized to prevent particulate matter having a diameter greater than the gap from moving across the ridge. The ridges 76 thus function as an edge filter. The ridges may be configured to cooperate with either the base plate or the cover plate to form a gap therebetween.

In FIGS. 8-11, yet another embodiment of an oil spray nozzle according to the invention is shown generally at 9°. The oil spray nozzle 90 differs from the oil spray nozzle 1o described above in that it has a main body structure formed by stamping and molding two plates to form a base plate 92 and a cover plate 94 of the housing. Base plate 92 includes integral tabs 96 and 98 that extend from laterally spaced side walls 100 and 102, respectively. Tabs 96 and 98 are curved relative to cover plate 94 to form the nozzle body. The cover plate 94 is the base plate 92
The nozzle passageway 104 cooperates with the substantially flat support of the nozzle passageway 104 to form a nozzle passageway 104.

The base plate 92 has a cylinder 106 with an inlet hole 108.
It is formed in a shape that has. Cylinder 106 receives a check valve assembly that includes a ball valve 110 and a spring 112 that biases the ball valve against the cylinder's internal valve seat to close inlet hole 108 . Valve 110 and spring 112 are captured between cover plate 94 and base plate 92 as best shown in FIG.

The nose of the cover plate 94 is curved to form a deflector 114. The cover plate has a recess that partially defines the nozzle passage 104. Passage 104 extends from the entrance of the cylinder to a nozzle orifice 120 defined between cover plate 94 and base plate 92 adjacent deflector 114 . In order to better control the shape of the deflector 114, the portion of the deflector 114 that defines the nozzle passage 104 has a predetermined shape.
and is formed in the base plate 92 at the nozzle end adjacent the nozzle orifice 120. The nozzle has a hole 118 formed therein and configured to receive a fastening element for mounting the nozzle to a cylinder block 134 of an internal combustion engine, as described above with respect to nozzle 10.

In the oil spray nozzle, generally indicated at 130 in FIG. 12, a leaf spring 132 is used in place of the check valve assembly described above. Leaf springs 132 are disposed between opposing flats of the housing and cover plate and are secured in place by bending retaining tabs on the housing, as described above for nozzle 90. In some embodiments, a retention structure extending integrally from the cover plate and curved onto the housing may be employed, rather than a retention structure extending from the side wall of the housing as described above.

In some applications, neither a check valve nor a leaf spring is necessary, in which case a flow path is continuously defined between the inlet hole and the outlet orifice of the nozzle.

In FIGS. 15 and 16, yet another embodiment of the oil spray nozzle is indicated generally by the reference numeral 50. In FIGS. Oil spray nozzle 150 is suitable for applications where there is little room to accommodate the nozzle. Nozzle 150 includes a base plate 152, an intermediate passage plate 154, and a cover plate 156 made of sheet metal. The base plate 152 is folded around the passage plate and over the cover plate to form a retaining flange 153 as described above. The thus assembled plates are curved to form a nozzle head terminating in a nozzle orifice 160. A hole 158 extends through the assembled plate.

In FIG. 16, the nozzle 150 is shown in a very large configuration for applications where sufficient clearance does not exist to incorporate independently disposed check valve assemblies and fastening elements to fasten and secure the nozzle in place. It is a compact nozzle. An oil gear rally 146 communicates with a bore 148 that receives a threaded fastening element 162. The fastening element 162 serves to secure the nozzle in place and to accommodate the check valve assembly. The fastening element 162 includes a longitudinal bore 164 and a radial bore 170 that communicates with the bore 64 near the head of the fastening element. The fastening element and the portion of the hole 158 adjacent to the fastening element cooperate with each other to define an annular space 172, which allows fluid to flow from the oil gear rally 146 through the bore 148, 164, 170 and the annular space 172 to the nozzle passage. A passage is defined which communicates with the nozzle orifice 160 and leads to the outside. A threaded surface of the fastening element fixes the nozzle to the internal combustion engine. A spring 166 biases a ball valve 168 that is positioned by a tight fit retaining ring 174.

Retaining ring 174 is secured in place by crimping the distal material 175 of fastening element 162 onto the edge of retaining ring 174 to retain the spring and ball valve assembly. The retaining ring also functions as a valve seat for the ball valve 168. It will be appreciated that this nozzle 150 is very compact due to the fact that the check valve assembly is integrated with the fastening element for mounting the nozzle. ,
and 150 are formed in a relatively efficient and low profile construction and assembly process to form a sandwich type nozzle structure that has a compact, low profile and provides a suitable spray pattern for cooling the crown of the piston. It's something you get.

The housing components for each nozzle described above may be assembled by methods that do not require welding, brazing, or similar methods. The cooperating engagement of the housing components with each other by crimping is sufficient to maintain the components assembled and to seal the nozzle passageway. In one embodiment of the oil spray nozzle 10, the assembled housing 30 is about 0.110 to 0.120 inches (2.8 to 3.0 mm).
) and a width of about 0.60 inches (15 mm) and a length of about 1.5 inches (38 mm). The dimensions of the holes 43 and the passages 48 may vary depending on the internal combustion engine to which the nozzle is applied. In one embodiment of nozzle 90, the assembled housing has approximately 0.0
85~0.108 inch (2,2~2.7111 In)
It has a thickness in the range of .

In some applications, the clearance of the nozzle with the cylinder or piston is not a critical issue, so the nozzle flow path extending from the oil gear rally can be made longer, and the direction of oil discharge can be made more precise. I can do it.

17-19 illustrate an improvement over the nozzle assembly shown in FIG. 8, in which a longer, more elaborate nozzle tip member formed from a tubular member extends from a nozzle holder formed from sheet metal. are doing. The connection between the nozzle tip and the nozzle holder is made by an interference fit, so the entire nozzle assembly can be easily manufactured at relatively low cost, and the direction of the cooling oil discharge and spray pattern can be easily controlled. Can be highly optimized. Nozzle assembly 176 includes a holder 178 that includes components that are the same or functionally similar to many of the components shown in FIG. In FIGS. 17 to 19, the same parts as those shown in FIG. 8 are designated by the same reference numerals with the suffix raJ. 17th
The most significant difference between the illustrated nozzle assembly 176 and the nozzle assembly illustrated in FIG. is an extension of the nozzle passageway 104 and nozzle forming structures 114, 120 of FIG.

The nozzle tip member 180 has a cylindrical portion 182 having a desired bending angle of, for example, 90°. The mounting end 184 is configured to fit within the nozzle passageway X04a of the holder 178, and the other end 186 has an orifice configured to discharge cooling fluid in a predetermined spray pattern.

The nozzle holder 178 includes a housing 92a that is substantially flat at a first longitudinal end 200 and a second longitudinal end 216 and has an intermediate protrusion 1 defining an inlet cylinder.
06a, through which the cooling oil flows to the holder 17.
8. A cover plate 94a is provided having a first end 188 and a second end 214 extending substantially coextensive with the first end 200 and second end 216 of the housing, respectively. The cover plate includes a longitudinally extending arcuate groove that cooperates with the front portion of the housing to form a passageway 104a.

As shown in FIG. 19, the mounting end 184 of the nozzle tip 180 is substantially D-shaped to match the shape of the passageway 104a defined by the cover plate 94a and the housing 92a. is preferred. As in each of the above embodiments, the integral flange portion 100a
and 102a are folded to form retaining rails 96a and 98a that cooperate with the sides of cover plate 94a, the nozzle hole 178 is itself sealed and the nozzle tip 180 is in the passageway 104a. However, it is mechanically sealed.

Preferably, the nozzle tip 180 is retained within the passageway 104a by an interference fit, such as a swage joint 190 and a locking ledge 192.

In the preferred embodiment, the features of the embodiment shown in FIG. 7 are also incorporated into the nozzle holder 178. Thus, intermediate plate 202 having first end 204 and second end 206 is sandwiched between cover plate 94a and housing 92a at least at corresponding second ends. The first end 204 and second end 206 of the intermediate plate 202 are connected to the first end 200, second end 216 of the housing and the first end 218, second end 214 of the cover plate. a portion of the intermediate plate 202 or a flat portion of the D-shaped passageway 104a extending over the same extent as and thereby extending longitudinally between the inlet cylinder of the housing and the first end 200 of the housing. It is preferable that the The intermediate plate 202 has an orifice 208 located between the passageway 104a and the inlet cylinder 106a, the orifice extending through the annular rim 2.
10 is preferable.

Rim 210 provides a seating surface for coil spring 112a that maintains ball 110a in sealing engagement with the inlet hole until the oil pressure reaches the sill pressure. The incoming oil must pass through the gaps between each turn of spring 112a before passing through orifice 208, thereby filtering particulate matter. Housing 92a
The use of an intermediate plate 202 that extends substantially coextensively with the cover plate 94a prevents oil from leaking or bypassing around the spring 112a, so that any oil entering the spring 112a is prevented from leaking or bypassing. It must pass through the filter under the filtration action of

As shown in FIG. 19, in a preferred embodiment, the mounting end 184 of the nozzle tip 180 is not sealed directly to the first end 200 of the housing, but rather is attached to an intermediate plate 202. is sealed against the upper side of the first end 204 of.

An effective sill between the tubular nozzle tip 180 and the flat sheet metal holder 178 is provided by a cover plate 94a that extends substantially coextensively with each other.
This can be achieved by appropriately caulking the flange portions 96a and 98a against the side portions of the ends of the intermediate plate 202 and tightening them appropriately.

As in the previous embodiments, holes 11 for fastening elements
8a is housing 92a1 force bar plate 94a1 intermediate plate 202, flange portion 96a of housing 92a
and 98a.

As shown in FIG. 17, the assembled nozzle holder 178 includes a cover plate 94a and an intermediate plate 2.
It is similar to the box-shaped structure of the housing 92a surrounding the housing 92a.

A preferred method of manufacturing nozzle assembly 176 is to form the housing 92a and cover plate 94a from sheet metal, with one of the housing and cover plate folded relative to the other to accommodate it. forming the housing and cover plate to have a large lateral dimension; The cover plate 94a also has a longitudinal groove 19 extending from a position between the ends 188 and 214 to the end 188.
4 is formed. The intermediate plate 202 has an orifice 20
It is substantially flat except for the rim portion 210 which defines g.

These members are valve components 110a s 112a
are aligned within the inlet cylinder 106a, and the intermediate plate 2o
2 is placed on the housing 92a, and then the cover plate 94a is placed on the intermediate plate 202 and the housing 92a.
It is assembled so that it is disposed on top to form a passageway 104a. According to the illustrated embodiment, the laterally extending tab portion 1
00a and 102a may be curved 9o0 to laterally hold the intermediate plate and cover plate.

The nozzle tip member 180 has a D-shaped mounting end 184 from the beginning.
Alternatively, it may be later squeezed into a desired shape.

The mounting end 184 is inserted into the passage 104a and fixed by forming a clinching joint 190. Alternatively, the mounting end 184 may be lightly upset and the cover plate crimped just forward of the upset. The flange portions 96a and 98a are then curved to form the first
7 and 19, whereby the orifice 208 and the passage 10 are opened from the inlet cylinder 106a.
The flow path through the 4a1 attachment end 184 is sealed.

In the crankcase of an internal combustion engine, the nozzle assembly 1
Note that it is not necessary to completely seal 76. A small amount of oil leakage contributes to the oil lubrication within the crankcase and is tolerated as long as the amount of oil that flows into the inlet cylinder 106a is discharged through the nozzle orifice 186 to cool the piston crown.

An oil spray nozzle 250 is shown in FIGS. 20-23 and has an efficient two-piece body construction including a housing 252 and a cooperating plate 254.

Housing 252 and plate 254 are assembled in a compact, face-to-face sandwich relationship. The housing includes an integral cylinder 256 as described above and a pair of laterally spaced upright skirts 258 and 260.
Contains. Integral extensions 259 and 261 extending from the skirt are folded back into engagement with plate 254, thereby securing the plate to the housing. The nozzle 250 also includes a hole 264 provided through the housing and plate to receive a fastening element for mounting the nozzle 250.

Plate 254 is formed by first stamping a substantially flat L-shaped blank.

A depression 262 is formed in the blank plate by fine blanking or semi-shirring. Recess 262 includes a circular edge 266 that positions one end of the valve spring and a constricted tip 268 that cooperates with housing 252 to form a nozzle orifice 270. The depressions are formed with low friction by displacing material in predetermined portions of the blank using a conventional punching process. The punch die engages a surface of the blank located over a complementary sized hole thereto. The coining process forms very well defined edges 272 and 274 that are substantially perpendicular to the floor 276 of the depression. Note that the cross section of the recess in the portion forming the orifice of the tip is substantially rectangular. The depth of the recess may be uniform throughout or may vary as desired. Generally, the depth of the depression at the constricted tip in the vicinity of the orifice 270 is uniform.

The coined plate 254 has a rigid structure that allows it to be bent significantly without compromising the functional and structural integrity of the nozzle passageway or buckling. The formation of the depression is accompanied by a displacement of the material, resulting in a second
As shown in FIG. 2, a protrusion 280 is formed on the upper surface of the opposite side of the plate. After the housing and plate are assembled together, the assembly is curved into the final curved configuration shown in FIG. This curved nozzle structure is called a three-dimensional compound J-shape. One of the J-shaped bends is formed by stamping the housing 252 and plate 254, and the other bend is formed after the housing and plate are assembled. The shape and dimensions of the passageway formed, particularly the orifice 270, are precisely set so that the spray pattern is properly controlled.

24-27, yet another embodiment of an oil spray nozzle having a two-piece body structure is shown generally at 300. nozzle 300
housing 302 and cooperating plate 304
has an initially offset stamping shape forming a slightly curved nozzle passage. Plate 304 also undergoes a fineblanking or coining process in which material is displaced by a punch to form a recess 310 having straight edges and substantially vertical corners at a distal orifice 306 as described above for plate 254. It is molded by. Thus plate 30
4 is formed with relatively low friction, but is sufficiently rigid for subsequent compound curvature to position the nozzle orifice as shown in FIG. The first planar portion of the housing 302 is of substantially rectangular cross section with well defined corners in the nozzle portion that engages the plate 304 and thereby defines the orifice so that the spray pattern is accurately controlled. A passage is formed. The particular curvature shape and orifice positioning may depend on the requirements of the application to which the nozzle is applied.

The two-piece nozzle body structure of nozzles 250 and 300 provides an efficient and compact nozzle structure that is shaped and dimensioned to suit a wide range of applications. The coining process in which the nozzle forms passages and orifices allows for a low-friction nozzle in which the spray pattern is effectively controlled by precise sizing of the nozzle orifice.

Although the present invention has been described above in detail with reference to several embodiments, the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art that

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the crankcase of an internal combustion engine, showing the cylinder, piston and oil spray nozzle according to the invention. FIG. 2 is an enlarged exploded perspective view of the oil spray nozzle shown in FIG. 1. FIG. 3 is a longitudinal sectional view of the oil spray nozzle shown in FIG. 2. FIG. 4 is a cross-sectional view of the oil spray nozzle taken along line 4--4 of FIG. FIG. 5 is a partial sectional view showing a part of an internal combustion engine and a second embodiment of an oil spray nozzle according to the invention. FIG. 6 is an exploded view of the internal combustion engine and the oil spray nozzle shown in FIG. 5, seen from below, and the swing path of the connecting rod of the piston is shown by a broken line. FIG. 7 is a longitudinal sectional view showing a third embodiment of the oil spray nozzle according to the invention. FIG. 8 is a longitudinal sectional view showing a fourth embodiment of an oil spray nozzle according to the present invention, with the nozzle being shown attached to a portion of the crankcase of an internal combustion engine. FIG. 9 is a cross-sectional view of the oil spray nozzle taken along line 9--9. FIG. 10 is a cross-sectional view of the oil spray nozzle taken along line 10--10 of FIG. FIG. 11 is an enlarged partial plan view of the end of the oil spray nozzle shown in FIG. 8. FIG. 12 is a partial sectional view showing a fifth embodiment of the oil spray nozzle according to the present invention. FIG. 13 is an enlarged partial bottom view of a filter device used in an oil spray nozzle according to the present invention. FIG. 14 is a partial cross-sectional view of the oil spray nozzle taken along line 14--14 of FIG. 13. FIG. 15 is a partial sectional view showing a sixth embodiment of an oil spray nozzle according to the present invention. FIG. 16 is a partial cross-sectional view of the oil spray nozzle 3 shown in FIG. 15, with the nozzle shown attached to a portion of the crankcase of an internal combustion engine. FIG. 17 is a perspective view showing still another embodiment of the oil spray nozzle according to the present invention having a tubular nozzle tip. FIG. 18 is a cross-sectional view of the oil spray nozzle taken along line 18-18 of FIG. 17. FIG. 19 is a sectional view of the oil spray nozzle along line 19- ], 9 of FIG. 18. FIG. 20 is a perspective view showing still another embodiment of the oil spray nozzle according to the present invention. FIG. 21 is a partially cutaway side view of the oil spray nozzle shown in FIG. 20. FIG. 22 is a plan view of the oil spray nozzle shown in FIG. 20. FIG. 23 is a bottom view of the oil spray nozzle shown in FIG. 20. FIG. 24 is a side view showing still another embodiment of the oil spray nozzle according to the present invention. FIG. 25 is a plan view of the oil spray nozzle shown in FIG. 24. FIG. 26 is a bottom view of the oil spray nozzle shown in FIG. 24. FIG. 27 shows the oil spray nozzle shown in FIG.
This is an elevational view seen from the left in Figure 4. 10...Oil spray nozzle, 12...Internal combustion engine, ]6
...Piston 18...Cylinder 20...Crankcase, 22...Oil gear rally 130...
Housing, 32... End tab, 36. 38. Skirt portion. 40...Middle passage plate, 42...Cylinder, 44...
・Inlet hole 46...hole, 47...orifice, 48
... Passage 50 ... Cover plate, 60 ... Ball valve, 62 ... Spring, 68 ... Fastening element, 72.74.
- Passage segment 76...Ribule 90...Oil spray nozzle, 92...Base plate 94...Cover plate, 96.98...Tab, 100.102...
side wall, 104... passage, 106... cylinder, 108...
...Inlet hole, 1]0...Ball valve, 112...Spring,
114...Deflector. 118 hole 120 orifice, 130... oil spray nozzle, 132... leaf spring, 134... cylinder block, 150... oil spray nozzle, 152... base, 153... flange, 154... intermediate passage plate, 156... Cover plate, 158... Hole 160
... Orifice, 162 ... Fastening element, 164.1
70... Bore, 172... Annular space, 174...
Retaining ring, 176... Nozzle assembly, 178...
Holder, 180... Tip member, 182... Cylindrical part, 184... Mounting end, 186... Other end, 188.2
00 first end, 124.216... second end, 2
50... Oil spray nozzle, 252 Housing, 2
54...Plate, 256...Cylinder, 258.260
・・Skirt part, 259.261 ・・Extension part, 262・
... hollow, 264 ... hole, 270 ... orifice,
272.274...edge, 276...floor, 280...
・Protrusion, 300...Oil spray nozzle, 302...
Housing 304... plate, 306... orifice, 3]O... recess

Claims (3)

[Claims] (1) A nozzle assembly for cooling the crown of a piston of an internal combustion engine, the nozzle assembly having first and second ends and having an inlet hole between the first end and the second end. housing means defining a laterally projecting inlet cylinder and including a pair of laterally spaced side walls; and an integral extension of said side walls received between said housing means; plate means secured to a nozzle defining a recess having spaced edges, said recess cooperating with said housing means extending from said cylinder to said first end; defining a passageway, said edge of said recess including plate means partially defining a constricted nozzle orifice at said first end, and a valve member and a spring received within said cylinder; captured between housing means and said plate means, said valve member biased by said spring to prevent said fluid from passing through said passageway when fluid pressure is below a preset threshold; check valve means displaceable so that fluid passes through the passageway and is injected through the orifice. (2) a nozzle assembly for cooling the crown of a piston of an internal combustion engine, the nozzle assembly having first and second ends and having an inlet hole between the first end and the second end; housing means integrally forming a laterally projecting inlet cylinder defining a recess; plate means secured to said housing means defining a recess and cooperating with said housing means to define a nozzle passageway and said housing means; defining a nozzle orifice located at a first end, said passageway extending from said cylinder to said orifice, said orifice being defined by substantially perpendicularly intersecting surfaces of said recess and said housing means; a plate means integrally extending from one of the housing means and the plate means and bent relative to the other of the housing means and the plate means so that the housing means and the plate means are assembled together; a retaining flange is provided between the inlet hole and the orifice, the retaining flange being secured between the housing means and the plate means, the fluid being retained when the pressure of the fluid is below a preset threshold; a valve means including a valve member for blocking passage from the inlet hole to the nozzle orifice. (3) A nozzle assembly for cooling the crown of a piston of an internal combustion engine, the nozzle assembly having first and second ends and having an inlet hole between the first end and the second end. housing means integrally forming a laterally projecting inlet cylinder defining a recess; and plate means secured to said housing means defining a recess, the plate means cooperating with said housing means defining a nozzle passageway and said inlet cylinder. defining a constricted nozzle orifice located at one end, said passageway extending integrally from one of said housing means and said plate means, plate means extending from said cylinder to said orifice; a retaining flange folded relative to the other of the housing means and the plate means to secure the housing means and the plate means in assembled relation to each other.