JP2015203326A - Oil filter attachment structure of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil filter attachment structure of an engine which enables an oil filter to be efficiently disposed in a narrow space around an engine and enables improvement of the workability of replacement of the oil filter.SOLUTION: A chain case 70 is provided between an engine body and a transmission case, and the chain case 70 has a lower case part 71 at its lower part side and an upper case 74 integrally provided with the lower case part 71 at the upper part side of the lower case part 71. The lower case part 71 has a lower outer peripheral wall 72 and the lower outer peripheral wall 72 has an expansion part 80 extending from a lower part of the upper outer peripheral wall 76 to an area above a balancer shaft 26. An oil pump 82 and an oil passage 78 are disposed in a space enclosed by the expansion part 80. An oil filter 110 is attached to an upper surface of the expansion part 80 through an adapter 90.

Description

  The present invention relates to an engine oil filter mounting structure, and more particularly to an engine oil filter mounting structure in which an oil filter is mounted on a chain case.

  In general, an engine (internal combustion engine) mounted on a vehicle or the like includes an oil filter that filters oil, and the oil pumped by an oil pump passes through the oil filter and is supplied to each part of the engine.

  As an oil filter mounting structure for this type of engine, a structure in which a chain case is disposed at an end in the crankshaft direction with respect to the engine body and an oil filter is mounted on the chain case is known (Patent Document). 1). In the oil filter mounting structure described in Patent Literature 1, a chain case is provided at an end of the engine body opposite to the transmission in the crankshaft direction.

JP 2012-21416 A

  However, in the conventional engine oil filter mounting structure described in Patent Document 1, an auxiliary machine such as a generator and an auxiliary machine driving belt for transmitting power from a crankshaft to the auxiliary machine are arranged around the chain case. Has been.

  For this reason, in order to place the oil filter in the chain case so as to avoid the accessories and the belt for driving the accessory in a narrow space around the engine, it is necessary to place the oil filter in the lower part of the engine. There was a problem that the exchange workability was not good.

  The present invention has been made in view of the above problems, and an oil filter mounting structure for an engine that can efficiently arrange an oil filter in a narrow space around the engine and can improve the workability of replacing the oil filter. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, a first aspect of the present invention includes an engine body having a cylinder block and a cylinder head, and a drive disposed in parallel to a crankshaft at a lower portion of the engine body. A shaft, a chain case disposed between the engine body and the transmission case, an exhaust pipe extending vertically downward from the cylinder head and passing through a space on a side in a radial direction of the drive shaft, An oil filter mounting structure for an engine comprising: an oil pump driven by the drive shaft; and an oil filter to which oil is pumped from the oil pump through an oil passage. The chain case extends along the transmission case. A lower outer peripheral wall formed in a shape and joined to both the engine body and the transmission case, and the engine An upper outer peripheral wall formed in a shape along a portion of the body that is exposed above the transmission case and joined to the exposed portion, and the lower outer peripheral wall is driven from the lower portion of the upper outer peripheral wall. A bulging portion extending upward of the shaft, wherein the oil pump and the oil passage are arranged in a space surrounded by the bulging portion, and the oil filter is attached to an upper side surface of the bulging portion. ing.

  As a second aspect of the present invention, the engine body preferably has two cylinders.

  As a third aspect of the present invention, between the bulging part and the oil filter, a bulging part side joining part joined to the bulging part and an oil filter side joining part joined to the oil filter are provided. And an adapter in which an oil passage in the adapter that communicates the bulge portion side joint portion and the oil filter side joint portion is formed, and the oil filter side joint portion is disposed on the bulge portion side. It is preferable that the transmission case is closer to the transmission case than the joint and is separated from the exhaust pipe.

  As a fourth aspect of the present invention, the adapter has a flange portion protruding in a hook shape from the oil filter side joint portion toward the outer periphery of the oil filter, and the flange portion is viewed from the crankshaft direction. Inclined so that the height in the vertical direction decreases from the engine body toward the exhaust pipe, and flows out from the oil filter side joint when the oil filter is removed to the outer edge of the flange portion. It is preferable that a vertical wall portion for receiving the oil to be erected is provided, and a notch portion for dropping the oil received by the vertical wall portion downward is formed in a portion of the vertical wall portion on the side separated from the exhaust pipe.

  According to the first aspect of the present invention, the chain case is disposed between the engine body and the transmission case, and the oil filter is attached to the chain case, so that the oil filter is installed in a narrow space around the engine. It can be efficiently arranged at a position away from the accessory driving belt, the accessory and the exhaust pipe. In addition, the oil filter can be replaced from above the engine body by attaching an oil filter to the upper side surface of the bulging portion of the lower outer peripheral wall of the chain case, thus improving the oil filter replacement workability. be able to. Therefore, the oil filter can be efficiently arranged in a narrow space around the engine and the oil filter replacement workability can be improved.

  According to the second aspect of the present invention, in a two-cylinder engine having an engine main body having two cylinders, the engine main body is shorter in the crankshaft direction than the three-cylinder engine, and therefore the space around the engine in which an oil filter can be installed. However, by applying the engine oil filter mounting structure described above, the oil filter can be efficiently arranged in a narrow space around the engine and the oil filter replacement workability can be improved.

  According to the third aspect of the present invention, since the oil filter can be disposed at a position away from the exhaust pipe by attaching the oil filter to the bulging portion via the adapter, the oil filter is heated by the heat of the exhaust pipe. Can be prevented.

  According to the fourth aspect of the present invention, the oil flowing out from between the oil filter side joint and the oil filter during the oil filter replacement operation is received by the vertical wall portion, and the space away from the exhaust pipe from the notch portion. Can be dropped. For this reason, since there is no possibility that oil will adhere to an exhaust pipe at the time of oil filter exchange work, oil filter exchange workability can be improved.

FIG. 1 is a view showing an embodiment of an oil filter mounting structure for an engine according to the present invention, and is a plan view of an engine in which an oil filter is mounted on a chain case. FIG. 2 is a view showing an embodiment of an oil filter mounting structure for an engine according to the present invention, and is a front view of the engine in which an oil filter is mounted on a chain case. FIG. 3 is a view showing an embodiment of an oil filter mounting structure for an engine according to the present invention, and is a left side view of the engine with an oil filter attached to a chain case. FIG. 4 is a view showing an embodiment of an oil filter mounting structure for an engine of the present invention, and is a perspective view of a chain case to which an oil filter is mounted as viewed from the left front. FIG. 5 is a view showing an embodiment of an oil filter mounting structure for an engine according to the present invention, and is a side view of a chain case to which an oil filter is mounted as viewed from the engine side. FIG. 6 is a view showing an embodiment of an oil filter mounting structure for an engine of the present invention, and is a side view of a chain case to which an oil filter is mounted as viewed from the transmission side. FIG. 7 is a view showing an embodiment of an oil filter mounting structure for an engine of the present invention, and is a front view of the oil filter and the adapter as viewed from the front.

  Hereinafter, an embodiment of an oil filter mounting structure for an engine according to the present invention will be described with reference to the drawings. 1-7 is a figure which shows the oil filter attachment structure of one Embodiment which concerns on this invention.

  First, the configuration will be described. 1 to 3, the engine 10 is configured as a four-stroke two-cylinder engine in which two cylinders 22 are arranged in series, and is mounted on a vehicle (not shown).

  Here, in the present embodiment, the front, left, and upper letters are attached in the drawing so as to correspond to the front-rear direction, the left-right direction, and the vertical direction as seen from the driver seated in the driver's seat, and an arrow is indicated. ing.

  A transmission 60 is connected to the left side of the engine 10, and the transmission 60 decelerates the rotation input from the engine 10 and transmits it to the wheels of the vehicle. The transmission 60 is a transaxle type transmission in which a differential device is integrated, and includes both a transmission mechanism (not shown) and a differential device inside a transmission case 62.

  The engine 10 includes an engine main body 12 and auxiliary equipment described later. The engine main body 12 includes a cylinder block 14, a cylinder head 16, a cylinder head cover 18, and an oil pan 20.

  Two cylinders 22 each having a piston (not shown) that reciprocates in the vertical direction by combustion of the fuel mixture are arranged in series in the left-right direction at the upper part in the cylinder block 14. A crankshaft 24 that converts the reciprocating motion of the piston of each cylinder 22 into a rotational motion and outputs it is provided below the cylinder block 14.

  The crankshaft 24 is arrange | positioned at the lower part of the engine main body 12 as shown in FIGS. A balancer shaft 26 as a drive shaft is disposed in parallel with the crankshaft 24 at the lower portion of the engine body 12. The balancer shaft 26 has a balance weight and cancels vibrations generated in the crankshaft 24 and the like by rotating in conjunction with the crankshaft 24.

  Inside the cylinder head 16, an intake valve and an exhaust valve (not shown), and a valve mechanism such as a camshaft (not shown) that drives the intake valve and the exhaust valve are provided. In addition, an intake port and an exhaust port (not shown) are formed on the rear side and the front side of the cylinder head 16, respectively. Air intake and exhaust gas for air to a combustion chamber (not shown) via the intake port and the exhaust port are formed. Is exhausting.

  The cylinder head cover 18 is provided on the upper part of the cylinder head 16 and covers the upper surface of the cylinder head 16. The oil pan 20 is provided at the lower part of the cylinder block 14 and stores oil as lubricating oil for lubricating each part of the engine 10.

  An auxiliary machine 30 and an auxiliary machine driving belt 28 for driving the auxiliary machine 30 are provided on the right side and the front side of the engine body 12. Further, an auxiliary machine 31 and an auxiliary machine driving belt 29 for driving the auxiliary machine 31 are provided on the right side and the rear side of the engine body 12.

  Auxiliary machines 30 and 31 are constituted by either an alternator for power generation or a compressor for an air conditioner, for example. The auxiliary machine driving belts 28 and 29 transmit the rotation of the crankshaft 24 to the auxiliary machines 30 and 31, respectively.

  An air cleaner 34 is provided on the left side of the upper portion of the engine main body 12, and the air cleaner 34 filters the air sucked from the air inlet 32.

  An air pipe 36 is connected to the right side of the air cleaner 34, and the air pipe 36 extends forward of the cylinder head 16 through the cylinder head cover 18. A turbocharger 38 is provided in front of the cylinder head 16, and a rear end of the air pipe 36 is connected to an air inlet 40 of the turbocharger 38.

  An engine cover 19 having a rectangular shape as viewed from above is provided above the engine body 12, and the engine cover 19 covers the cylinder head cover 18 and the air pipe 36 located above the cylinder head cover 18.

  The turbocharger 38 has a turbine and a compressor (not shown) that rotate integrally with each other, and the turbine is driven by the pressure of exhaust gas introduced from the engine body 12 via the exhaust manifold 46, so that the air The compressor compresses the air introduced from the pipe 36.

  The air compressed by the turbocharger 38 is introduced from the air outlet 42 through an intake pipe (not shown) into the intercooler, and is cooled by heat exchange with the outside air in the intercooler.

  The air cooled by the intercooler is introduced into an intake manifold 44 disposed at the upper rear part of the engine body 12. The air introduced into the intake manifold 44 is introduced into the combustion chamber via an intake port (not shown) formed on the rear side of the combustion chamber in the cylinder head 16.

  A turbo outlet pipe 48 is connected to the turbine of the turbocharger 38, and a catalytic converter 50 is connected downstream of the turbo outlet pipe 48. The turbo outlet pipe 48 and the catalytic converter 50 constitute an exhaust pipe 47.

  Here, since the exhaust gas that has passed through the turbine of the turbocharger 38 is discharged leftward, the upstream end of the turbo outlet pipe 48 is formed to face in the left-right direction. The catalytic converter 50 is disposed below the turbocharger 38 in a posture extending in the vertical direction. Accordingly, the turbo outlet pipe 48 is formed to bend so as to extend in the left direction from the turbine of the turbocharger 38 and then turn in the lower right direction.

  The exhaust gas discharged from the turbocharger 38 is introduced into the catalytic converter 50 through the turbo outlet pipe 48, purified by the catalytic converter 50, and then discharged to the atmosphere through an unillustrated exhaust path. . A catalyst outlet pipe 51 downstream of the catalytic converter 50 is supported by the oil pan 20 via a flange 53.

  Further, an EGR (Exhaust Gas Recirculation) device 52 is provided on the rear side of the engine body 12, and this EGR device 52 circulates a part of the exhaust gas discharged from the exhaust manifold 46 to the intake path. .

  Thus, on the front side of the engine body 12, the accessory driving belt 28, the accessory 30, the exhaust manifold 46, the turbocharger 38, and the catalytic converter 50 are sequentially arranged from the right side to the left side. Further, on the rear side of the engine body 12, an auxiliary machine driving belt 29, an auxiliary machine 31, an intake manifold 44, and an EGR device 52 are sequentially arranged from the right side to the left side.

  A chain case 70 is provided between the engine body 12 and the transmission case 62, and the chain case 70 covers a timing chain (not shown) that drives the valve operating mechanism. The timing chain is wound around a crank sprocket and a cam sprocket (not shown) provided at the left end of the crankshaft 24 and the left end of the camshaft of the valve mechanism, and is synchronized with the rotation of the crankshaft 24. And the camshaft is rotating.

  As shown in FIGS. 4 to 6, the chain case 70 has a lower case portion 71 on the lower side thereof, and an upper case portion integrally with the lower case portion 71 on the upper side of the lower case portion 71. 74.

  In the present embodiment, the lower case portion 71 extends along a substantially disc-shaped partition portion 73 that partitions the lower portion of the cylinder block 14 that is the lower portion of the engine body 12 and the transmission case 62, and the outer edge portion of the transmission case 62. It has a lower outer peripheral wall 72 that is formed into a shape and is joined to both the engine body 12 and the transmission case 62 on the right and left sides.

  The upper case portion 74 includes a substantially dish-shaped closing portion 75 that closes the upper portion of the cylinder block 14 and the left side of the cylinder head 16 that are exposed to the upper side of the transmission case 62 of the engine body 12. It has an upper outer peripheral wall 76 which is formed in a shape along the upper part and the outer edge part of the cylinder head 16 and is joined to the upper part of the cylinder block 14 and the outer edge part of the cylinder head 16.

  An oil injection port 102 for injecting oil opens upward in the front portion of the upper outer peripheral wall 76 of the upper case portion 74. A vacuum pump mounting portion 104 to which a vacuum pump (not shown) is mounted opens leftward in the closing portion 75 of the upper case portion 74.

The lower outer peripheral wall 72 has a bulging portion 80 that extends upward from the lower portion of the upper outer peripheral wall 76 to the balancer shaft 26. The bulging portion 80 is an arc-shaped portion from the front end portion of the lower outer peripheral wall 72 to the boundary with the front lower end portion of the upper outer peripheral wall 76 and is surrounded by the bulging portion 80 in the lower case portion 71. An oil pump 82 and an oil passage 78 are arranged in the space. An oil filter 110 is attached to the upper side surface of the bulging portion 80 via an adapter 90.
The oil pump 82 is driven by the left end portion of the balancer shaft 26, thereby pumping up oil stored in the oil pan 20 and pumping it to each part of the engine 10. Oil delivered from the oil pump 82 passes through the oil passage 78 and is introduced into the oil filter 110.

  The oil passage 78 is formed integrally with the partition portion 73 of the lower case portion 71 and introduces oil sent from the oil pump 82 into the oil filter 110. The oil filter 110 has a filter medium inside and filters the oil introduced from the oil passage 78.

  An oil outlet passage 79 is opened on the engine body 12 side of the partition portion 73 of the lower case portion 71. The oil outlet passage 79 communicates with the cylinder block 14, and the oil filtered by the oil filter 110 is supplied to the cylinder block. 14 is supplied.

  In the present embodiment, the adapter 90 includes a bulging portion side joining portion 92 that joins to the bulging portion 80 and an oil filter side joining portion 94 that joins to the oil filter 110. Inside the adapter 90, as shown in FIG. 7, an in-adapter oil passage 91 that connects the bulging portion side joining portion 92 and the oil filter side joining portion 94 is formed.

  The oil filter side joint portion 94 is closer to the transmission case 62 than the bulge portion side joint portion 92 and is separated from the exhaust pipe 47. Specifically, the adapter 90 extends from the bulging portion 80 toward the transmission case 62 in the crankshaft direction, so that the oil filter side joining portion 94 is more exhausted than the bulging portion side joining portion 92. It is set apart from 47.

  The adapter 90 is not limited to a linearly extending shape, and may be any shape as long as the oil filter side joint portion 94 is separated from the exhaust pipe 47 than the bulge portion side joint portion 92. The shape may be curved so as to bypass the member.

  Further, in the present embodiment, as shown in FIG. 7, the adapter 90 has a flange portion 96 that projects from the oil filter side joint portion 94 in the shape of a bowl in the outer peripheral direction of the oil filter 110. The flange portion 96 protrudes in a leftward and forward direction from the outer peripheral portion of the oil filter side joint portion 94, and in the vertical direction as viewed from the crankshaft direction toward the exhaust pipe 47 from the engine body 12. It is formed so as to incline so that the height thereof becomes lower.

  Further, a vertical wall portion 98 is erected on the outer edge portion of the flange portion 96, and this vertical wall portion 98 receives oil flowing out from the oil filter side joint portion 94 when the oil filter 110 is removed. ing. A cutout portion 100 is formed in a portion of the vertical wall portion 98 that is separated from the exhaust pipe 47, and the cutout portion 100 discharges the oil received by the vertical wall portion 98 in the left front direction indicated by an arrow and moves downward. It is supposed to be dropped.

  Next, the operation will be described. In the engine 10 configured as described above, the auxiliary machine 30 and the space on the right side of the engine body 12 on the side opposite to the transmission case 62 with respect to the exhaust pipe 47 in the crankshaft direction (front side) An auxiliary machine driving belt 28 for driving is arranged.

  For this reason, if the oil filter 110 is arranged around the auxiliary machine 30, the installation position of the oil filter 110 becomes a low position such as below the auxiliary machine 30, and the replacement workability of the oil filter 110 is poor. turn into.

  In contrast, in the present embodiment, a chain case 70 is disposed between the engine body 12 and the transmission case 62, and the chain case 70 includes a lower outer peripheral wall 72 and an upper outer peripheral wall 76. The side outer peripheral wall 72 has a bulging portion 80 extending from the lower end of the upper outer peripheral wall 76 to above the balancer shaft 26. Further, the oil pump 82 and the oil passage 78 are arranged in a space surrounded by the bulging portion 80, and the oil filter 110 is attached to the upper side surface of the bulging portion 80.

  Thereby, the chain case 70 is disposed between the engine body 12 and the transmission case 62, and the oil filter 110 is attached to the chain case 70. For this reason, the oil filter 110 is driven by an auxiliary machine in a narrow space around the engine where the exhaust pipe 47 extends vertically downward from the cylinder head 16 and passes through the space on the radial side of the balancer shaft 26. The belts 28 and 29, the auxiliary machines 30 and 31, and the exhaust pipe 47 can be efficiently disposed at positions away from each other.

  Further, by attaching the oil filter 110 to the upper side surface of the bulging portion 80 of the lower outer peripheral wall 72 of the chain case 70, the oil filter 110 can be replaced from above the engine body 12, so that the oil filter 110 The replacement workability can be improved.

  Therefore, the oil filter 110 can be efficiently arranged in a narrow space around the engine and the workability of replacing the oil filter 110 can be improved.

  In this embodiment, the engine body 12 has two cylinders 22 and the engine 10 is configured as a two-cylinder engine.

  Thereby, in the engine 10 in which the engine body 12 has two cylinders, since the engine body 12 is shorter in the crankshaft direction than the three-cylinder engine, the space around the engine in which the oil filter 110 can be installed is narrowed. By attaching the oil filter 110 to the chain case 70 configured as described above, the oil filter 110 can be efficiently disposed in a narrow space around the engine, and the workability of replacing the oil filter 110 can be improved.

  In the present embodiment, the adapter 90 has a bulging portion side joint portion 92 and an oil filter side joint portion 94, an adapter internal oil passage 91 is formed therein, and the oil filter side joint portion 94 is It is closer to the transmission case 62 than the bulging portion side joint portion 92 and is separated from the exhaust pipe 47.

  Accordingly, the oil filter 110 can be disposed at a position away from the exhaust pipe 47 by attaching the oil filter 110 to the bulging portion 80 via the adapter 90, so that the oil filter 110 is heated by the heat of the exhaust pipe 47. Can be prevented.

  Further, in the present embodiment, the oil filter side joint portion 94 has a flange portion 96 protruding in a hook shape in the outer peripheral direction of the oil filter 110, and the flange portion 96 is seen from the crankshaft direction when the engine main body 12. It is inclined so that the height in the vertical direction becomes lower as it goes to the exhaust pipe 47 side. Further, a vertical wall portion 98 that catches oil flowing out from the oil filter side joint portion 94 when the oil filter 110 is removed is erected on the outer edge portion of the flange portion 96, and is separated from the exhaust pipe 47 in the vertical wall portion 98. A cutout portion 100 is formed in the side portion to drop the oil received by the vertical wall portion 98 downward.

  As a result, the oil that has flowed out between the oil filter side joint portion 94 and the oil filter 110 during the replacement operation of the oil filter 110 is received by the vertical wall portion 98 and dropped into the space away from the exhaust pipe 47 from the cutout portion 100. Can be made. For this reason, since there is no possibility that oil will adhere to the exhaust pipe 47 during the oil filter replacement operation, the oil filter replacement workability can be improved.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 12 ... Engine main body, 14 ... Cylinder block, 16 ... Cylinder head, 22 ... Cylinder, 24 ... Crankshaft, 26 ... Balancer shaft (drive shaft), 47 ... Exhaust pipe, 62 ... Transmission case, 70 ... Chain case, 72 ... lower outer peripheral wall, 76 ... upper outer peripheral wall, 78 ... oil passage, 80 ... bulging part, 82 ... oil pump, 90 ... adapter, 91 ... oil passage in adapter, 92 ... bulging part side joint part, 94 ... Oil filter side joint part, 96 ... flange part, 98 ... vertical wall part, 100 ... notch part, 110 ... oil filter

Claims (4)

An engine body having a cylinder block and a cylinder head;
A drive shaft disposed parallel to the crankshaft at the bottom of the engine body;
A chain case disposed between the engine body and the transmission case;
An exhaust pipe extending vertically downward from the cylinder head and passing through a space on a radial side of the drive shaft;
An oil pump driven by the drive shaft;
In an oil filter mounting structure for an engine, comprising an oil filter to which oil is pumped from the oil pump through an oil passage,
The chain case is formed in a shape along the transmission case, and has a lower outer peripheral wall joined to both the engine body and the transmission case, and a portion exposed to the upper side of the transmission case of the engine body. An upper outer peripheral wall that is formed in a shape that follows and is joined to the exposed portion,
The lower outer peripheral wall has a bulging portion extending upward from the drive shaft from a lower portion of the upper outer peripheral wall,
Disposing the oil pump and the oil passage in a space surrounded by the bulging portion;
An oil filter mounting structure for an engine, wherein the oil filter is mounted on an upper side surface of the bulging portion.   2. The engine oil filter mounting structure according to claim 1, wherein the engine body has two cylinders. Between the bulging part and the oil filter, there is a bulging part side joining part joined to the bulging part and an oil filter side joining part joined to the oil filter, and the bulging part side An adapter in which an oil passage in the adapter that communicates the joint and the oil filter side joint is formed is interposed,
3. The engine according to claim 1, wherein the oil filter side joint portion is closer to the transmission case than the bulge portion side joint portion and is separated from the exhaust pipe. 4. Oil filter mounting structure. The adapter has a flange portion projecting in a bowl shape from the oil filter side joint portion in the outer peripheral direction of the oil filter,
The flange portion is inclined so that the height in the vertical direction decreases from the engine body toward the exhaust pipe as viewed from the crankshaft direction.
On the outer edge of the flange portion, when removing the oil filter, a vertical wall portion is provided to receive the oil flowing out from the oil filter side joint,
The engine oil filter attachment according to claim 3, wherein a cutout portion for dropping the oil received by the vertical wall portion downward is formed in a portion of the vertical wall portion that is separated from the exhaust pipe. Construction.

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