JP4775580B2 - Oil filter mounting structure for tilt engine - Google Patents

Description

  The present invention relates to an oil filter mounting structure for a tilt engine, and more particularly to an improved oil filter mounting state, which increases the amount of oil that can be stored in an oil pan and protects the oil filter from below. This invention relates to an oil filter mounting structure for a tilt engine that prevents the damage of the oil filter, lowers the temperature of oil in the oil filter, and suppresses the protruding amount of the oil filter.

As a vehicle, there is known a vehicle in which an engine is mounted in an engine room at a lower floor such as a lower side with a crankshaft directed in the vehicle front-rear direction and a cylinder axis inclined at a predetermined angle from a vertical direction.
In this case, the engine is disposed close to the floor in order to enlarge the space in the passenger compartment and prevent the lower part of the engine from contacting the ground.
On the other hand, on the upper surface of the engine, auxiliary machines such as an alternator and an air conditioning compressor are disposed so as to protect them from water breakage and stepping stones.
The alternator is attached to all engines, while the air-conditioning compressor is limited to the engine to be attached depending on the presence or absence of an air-conditioner. For this reason, an auxiliary machine mounting structure in which an alternator is disposed above a cylinder block constituting the engine body and an air conditioning compressor is disposed on the side of the alternator is often employed.

JP-A-7-197803

By the way, in an oil filter mounting structure of a conventional tilt engine, in order to dispose the engine under the floor such as under the seat, an engine with the cylinder axis passing through the crankshaft tilted has a large tilt angle and the oil pan The oil pan may be formed in a triangular shape in order to secure the oil storage amount.
More specifically, the triangular oil pan is formed with a top at a portion facing an opening formed along the oil pan side mating surface joined to a cylinder block or a lower case (hereinafter referred to as a cylinder block or the like). The oil pan is such that the upper side surface and the lower side surface extending along the cylinder axis so as to sandwich the opening with the top portion as a base point are the upper surface and the bottom surface, respectively.
In this case, if the oil filter is attached to the upper surface of the oil pan, interference with the engine mount or the like becomes a problem. When the oil filter is attached to the side surface of the oil pan as shown in Patent Document 1, the minimum ground surface is required. In the case of a four-wheel drive vehicle, the propeller shaft extends forward and backward in the vicinity of the side surface of the oil pan, so that the mounting position is limited.

  In addition, since the oil filter is inevitably disposed at a position close to the ground, there is a disadvantage that the oil filter is damaged by a stepping stone.

On the other hand, the oil passage that connects the oil filter and the engine body can be made as compact as possible, and the oil filter can be arranged close to the communication hole with the engine body side provided in the oil pan. preferable.
However, the engine room of the engine disposed in the lower part of the floor is likely to be hot and the oil is liable to deteriorate, and this deterioration has the disadvantage that the performance of the engine is reduced.

Furthermore, since the oil pan is a triangular oil pan, the side away from the oil pan side mating surface with the cylinder block is a triangular top, so that the oil in the oil pan reservoir will turn to the top when turning left and right. The problem of bias does not occur so much.
However, the larger the angle at which the cylinder axis is tilted with respect to the vertical direction, the larger the opening formed along the oil pan side mating surface is so inclined that the opening side approaches the horizontal direction. In particular, the oil that has flowed out of the opening of the reservoir when turning counterclockwise can easily escape to the cylinder block or the like, and there is a disadvantage that the amount of oil is reduced around the oil strainer that sucks up the oil.

  The object of the present invention is to increase the amount of oil that can be stored in the oil pan, protect the lower part of the oil filter to prevent damage to the oil filter, reduce the temperature of the oil in the oil filter, and An object of the present invention is to provide an oil filter mounting structure for an inclined engine that can suppress the protruding amount of the oil filter.

Therefore, in order to eliminate the inconvenience described above, the present invention mounts the engine with the cylinder axis passing through the crankshaft inclined at a predetermined angle from the vertical direction, and mounts the crank on the front of the chain cover attached to the front of the engine. A crank pulley attached to the shaft end of the shaft is disposed, and an oil pan formed in a triangular shape as viewed from the axial direction of the crankshaft is disposed below the crank pulley, and oil is supplied to the oil pan. in the oil filter mounting structure of the tilt engine provided with a reservoir for storing, from the front of the chain cover in the longitudinal direction of the crankshaft on a portion which is disposed below the at least the cylinder axis a front surface of the oil pan to form a front protruding portion that bulges in a direction away, providing the reservoir in the bottom part of the front-side projection and the oil pan DOO The filter recess provided on the upper surface of the front protrusion, provided an inclined surface on the chain cover side of the filter concave portion, an oil filter mounting holes provided in the inclined surface, at least one of an oil filter connected to the oil filter mounting hole The lower part in the vicinity of the oil filter mounting hole enters the space surrounded by the filter recess, and the oil filter is disposed in the filter recess, and the oil filter is obliquely below the crankshaft in the vehicle width direction. It is characterized by being arranged.

As described above in detail, according to the present invention, by forming the front protrusion on the front surface of the oil pan, the amount of oil that can be stored in the oil pan can be increased. By attaching the oil filter to the oil pan, it can be attached to the oil pan without affecting the overall height of the engine, and the lower part of the oil filter can be protected by the filter recess to prevent the oil filter from being damaged by a stepping stone or the like.
Further, since the oil filter is disposed in front of the crank pulley in the rotational direction, the oil filter can be cooled by the cold air generated by the rotation of the crank pulley, and the temperature of the oil in the oil filter can be lowered. .
Furthermore, by providing an oil filter with an inclined surface provided on the chain cover of the filter recess, the oil filter can be accommodated in the filter recess without affecting the amount of oil stored, and the protrusion of the oil filter protruding from the filter recess The amount can be reduced.

By inventing as described above, a front protrusion is formed on the front surface of the oil pan to increase the amount of oil that can be stored in the oil pan, and an oil filter is attached to the front protrusion to affect the overall height of the engine. The oil filter is attached to the oil pan without giving it, and the lower part of the oil filter is protected by the filter recess to prevent the oil filter from being damaged by a flying stone or the like.
Further, the oil filter is disposed in front of the crank pulley in the rotational direction, and the oil filter is cooled by the cold air generated by the rotation of the crank pulley, so that the temperature of the oil in the oil filter is lowered.
Furthermore, an oil filter is attached by providing an inclined surface on the chain cover of the filter recess, and the oil filter is accommodated in the filter recess without affecting the oil storage amount, and the amount of protrusion of the oil filter protruding from the filter recess is reduced. It is suppressed.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 12 show an embodiment of the present invention.
In FIG. 2, 1 is a vehicle, 2 is a vehicle body, 3 is a passenger compartment, 4 is a front wheel, 5 is a rear wheel, 6 is a dash panel, and 7 is a floor of the vehicle 1.
The floor 7 includes a front floor 7A on the front side of the vehicle, a vehicle compartment portion floor 7B below the vehicle compartment 3, a center floor 7C in the middle of the vehicle, and a rear floor 7D on the rear side of the vehicle. The part 7E and the rear inclined step part 7F are stepped up to a predetermined height to form an engine room 8 in a required space below.
An engine 9 is mounted in the engine room 8 as shown in FIGS.
The engine 9 is mounted in the engine room 8 with the crankshaft 10 directed in the vehicle front-rear direction and the cylinder axis C passing through the crankshaft 10 inclined at a predetermined angle θ from the vertical line V that is the vertical direction. .
Further, as shown in FIGS. 4 to 6, the engine 9 is supported by a mount member 11 that extends in the vehicle width direction (the vehicle left-right direction).
As shown in FIG. 5, the mount member 11 includes a central support portion 12 that supports the engine 9 at the central portion, a left stepped portion 13 that stands up on the left end side of the central support portion 12, and a central support portion 12. The right stepped portion 14 is provided on the right end side of the right stepped portion 14, the left stepped portion 15 is provided on the left stepped portion 13 horizontally, and the right end portion 16 is provided on the right stepped portion 14.
As shown in FIG. 6, the mount member 11 has a left end portion 15 and a right end portion 16 supported by a left side member 17 and a right side member 18.
A front floor 7A is supported by the left side upright portion 17A of the left side member 17 and the left side upright portion 18A of the right side member 18.

The engine 9 includes a cylinder block 20 and a cylinder head 21 as a main body 19 as shown in FIGS.
An oil pan 22 is attached to the lower part of the cylinder block 20.
Further, a cylinder head cover 23 is attached to the upper part of the cylinder head 21.
At this time, as shown in FIGS. 4 to 6, the intake manifold 24 is attached to the cylinder head 21 on the right side surface which is the inclined upper side surface.
As shown in FIG. 6, the intake manifold 24 includes a plurality of branch pipes 25 that extend substantially horizontally on the right side in the vehicle width direction, and a surge tank 26 is continuously provided.
The intake manifold 24 and the surge tank 26 are disposed directly below the passenger compartment floor 7B.
Furthermore, a mounting bracket 27 connected to the right end side of the mount member 11 is attached to the right side surface, which is the inclined upper side surface of the cylinder head 21, as shown in FIGS.
On the other hand, an exhaust manifold 28 is attached to the left side surface, which is the inclined lower side surface of the cylinder head 21, as shown in FIGS.
The exhaust manifold 28 is disposed immediately above the left end side of the mount member 11.

As shown in FIGS. 4 to 6, an alternator 29 is attached to the main body 19 of the engine 9 as an engine accessory on the front side.
As shown in FIG. 6, the alternator 29 is disposed on the right side surface, which is the inclined upper side surface of the cylinder block 20, and on the front side of the vehicle with respect to the mount bracket 27. As shown in FIG. 5, the alternator shaft 30 and the alternator shaft are arranged. And an alternator pulley 31 attached to 30.
The alternator 29 is disposed above the oil pan 22 disposed below the engine 9 and at a position lower than the front floor 7A in front of the engine room 8, and is located on the right side of the vehicle relative to the crankshaft 10. Yes.
Further, as shown in FIG. 5, the alternator 29 includes, as viewed from the front, an alternator rotation center side mounting portion 32 that protrudes diagonally upward to the left in the radial direction and an alternator that protrudes diagonally downward to the right of the vehicle in the radial direction. A rotation / oscillation side mounting portion 33 is provided.
An alternator arm 34 fixed to the oil pan 22 toward the oil pan 22 so as to be substantially orthogonal to the cylinder axis C of the main body 19 of the engine 9 is connected to the rotation swing side mounting portion 33 for the alternator. Is done.
Accordingly, as shown in FIGS. 5 and 6, the alternator 29 is disposed at a position away from the floor 7 above the engine room 8 and above the upper wall 22 </ b> A of the oil pan 22.

As shown in FIGS. 3 and 5, an inclined portion 36 that rises toward the alternator 29 is formed on the front wall 35 located on the vehicle front side of the oil pan 22.
The inclined portion 36 has a lower portion protruding toward the front of the vehicle from the upper portion, and guides traveling wind from the front of the vehicle upward to the alternator 29 side.
Further, as shown in FIGS. 3 to 6, a projecting portion 37 protruding on the front side of the vehicle is formed at a lower portion of the oil pan 22.
The protrusion 37 has a function of guiding the traveling wind from the front of the vehicle to the inclined portion 36 side.
As described above, since the alternator 29 is disposed at a position away from the floor 7 above the engine room 8 and at a position where the traveling air flows, the hot air flowing out from the alternator 29 is flown from the alternator 29 as shown in FIGS. As a result, the engine room 8 can be pushed backward to prevent the temperature of the floor 7 above the engine room 8 from rising.
Further, at this time, the traveling wind is guided in the direction of the alternator 29 by the inclined portion 36 formed in the oil pan 22, and the power generation performance of the alternator 29 can be improved by enhancing the cooling effect of the alternator 29.
Thereby, problems such as a decrease in comfort in the passenger compartment 3 due to the hot air flowing out from the alternator 29 and a decrease in power generation performance of the alternator 29 itself can be solved.

Further, as shown in FIGS. 3 to 6, an oil filter mounting portion 38 is provided on the front wall 35 of the oil pan 22 at a position aligned with the inclined portion 36 in the vehicle width direction.
The oil filter 39 is attached to the oil filter attachment portion 38 so as to protrude largely to the vehicle front side from the protrusion 37.
The oil filter 39 can guide the traveling wind from the front side of the vehicle to the inclined portion 36 and increase the amount of traveling wind toward the alternator 29, thereby further improving the cooling effect of the alternator 29, Problems such as a decrease in comfort in the room 3 and a decrease in power generation performance of the alternator 29 itself can be solved.

Furthermore, as shown in FIG. 5, when the engine 9 is viewed from the front side of the vehicle, a gap 40 is formed between the alternator 29 and the main body 19 of the engine 9.
Then, as shown in FIGS. 3 to 6, an air conditioning compressor 41 is arranged as another engine auxiliary machine at a position covering the gap 40 from above.
As shown in FIGS. 3 and 5, the air conditioning compressor 41 is disposed above the crankshaft 10 of the engine 9 and directly below the passenger compartment floor 7B, and is attached to the compressor shaft 42 and the compressor shaft 42. The compressor pulley 43 is provided.
As shown in FIG. 5, the air-conditioning compressor 41 includes a compressor rotation center side mounting portion 44 that protrudes diagonally downward to the right of the vehicle on the alternator rotation center side mounting portion 32 side in the radial direction in a front view, and a radial direction. And a compressor rotation swing side mounting portion 45 protruding upward.
A compressor arm 46 is connected to the compressor rotation / oscillation side mounting portion 45.
With this structure, as shown in FIG. 3, a part of the traveling wind guided to the alternator 29 by the inclined portion 36 of the oil pan 22 tries to escape through the gap 40 above the engine room 8. Such traveling wind can be captured by the air-conditioning compressor 41 and guided to the rear of the vehicle, thereby further improving the cooling effect of the alternator 29 and reducing the comfort in the passenger compartment 3 or the power generation of the alternator 29 itself. Problems such as performance degradation can be solved.
The air-conditioning compressor 41 is connected to an evaporator and a condenser mounted on the vehicle 1 via a refrigerant pipe, so that vibration is more easily transmitted to the vehicle body than the alternator 29.
Conventionally, the alternator 29 has been disposed closer to the cylinder block 20 than the air conditioning compressor 41.
However, in this embodiment, the arrangement of the air conditioning compressor 41 and the alternator 29 is switched, and the air conditioning compressor 41 is arranged at a position closer to the cylinder block 20 than the alternator 29.
Thereby, the support rigidity to the cylinder block 20 of the compressor 41 for air conditioning can be improved, and the vibration transmission to a vehicle body can be reduced.

Further, as shown in FIG. 5, an auxiliary machine support bracket 47 extending upward between the alternator 29 and the air conditioning compressor 41 is fixed to the cylinder block 20 in the vicinity of the joint surface with the lower oil pan 22. The
As shown in FIG. 5, an alternator rotation center side mounting portion 32 is attached to the auxiliary machine support bracket 47 by an alternator side bolt 48 serving as a rotation shaft, and a compressor rotation center side mounting portion 44 is a rotation shaft serving as a rotation shaft. It is attached by a side bolt 49.
Therefore, the auxiliary machine support bracket 47 also serves as a bracket that supports the alternator 29 and the air conditioning compressor 41.
Thereby, the number of auxiliary machine support brackets can be reduced, the configuration can be simplified, and the cost can be reduced.

Further, as shown in FIGS. 5 and 6, a water pump 50 is attached to the main body 19 of the engine 9 as another engine accessory on the front side.
As shown in FIG. 5, the water pump 50 is disposed above the crankshaft 10 of the engine 9 and to the left of the air conditioning compressor 41, and includes a water pump shaft 51 and a water pump attached to the water pump shaft 51. And a pump pulley 52.
The water pump pulley 52 is arranged on the same plane as the compressor pulley 43 as shown in FIG.

As shown in FIGS. 3 and 5, the shaft end of the crankshaft 10 of the engine 9 is the same as the alternator pulley 31 on the front side of the chain cover 77, which will be described later, attached to the front side of the engine 9. A first crank pulley 53 on a plane and a second crank pulley 54 which is smaller in diameter than the first crank pulley 53 and protrudes toward the front of the vehicle and on the same plane as the compressor pulley 43 and the water pump pulley 52 are attached. .
A first belt 55 is wound around the first crank pulley 53 and the alternator pulley 31.
A second belt 56 is wound around the second crank pulley 54, the compressor pulley 43, and the water pump pulley 52 as shown in FIGS.
Therefore, as shown in FIGS. 3 and 5, the alternator 29 and the air conditioning compressor 41 are driven independently from the crankshaft 10 by the first belt 55 and the second belt 56, respectively.
Further, as shown in FIGS. 4 and 6, the second belt 56 is disposed on the vehicle front side of the first belt 55 in the crankshaft direction (vehicle longitudinal direction).
Therefore, the alternator 29 is driven via the first belt 55 by the rotation of the crankshaft 10.
The air conditioning compressor 41 and the water pump 50 are driven via the second belt 56 by the rotation of the crankshaft 10.
As described above, the air conditioning compressor 41 is disposed on the vehicle front side of the alternator 29 in the crankshaft direction, so that the traveling wind passing upward from the gap 40 can be captured further upstream.
Thereby, the cooling effect of the alternator 29 can be further improved to solve problems such as a decrease in comfort in the passenger compartment 3 and a decrease in power generation performance of the alternator 29 itself.
In this case, the first belt 55 is wound around the first crank pulley 53 and the alternator pulley 31 as two axes, and the second crank pulley 54 and the compressor pulley 43 as the second belt 56 as three axes. Since it is wound around the water pump pulley 52, the second belt 56 is wound around the first crank pulley 53, the alternator pulley 31 and the water pump pulley 52 with the first belt 55 as the three axes as in the prior art. Compared with the case of winding around the second crank pulley 54 and the compressor pulley 43 as two shafts, the diameter of the alternator pulley 31 and the diameter of the water pump pulley 52 can be set independently, and the pulley ratio can be set freely. The degree can be increased.
Therefore, for example, when the diameter of the first crank pulley 53 is increased to increase the speed of the alternator pulley 31 to increase the amount of power generation, the water pump pulley 52 is increased in accordance with the first crank pulley 53 as in the prior art. There is no need to do it.
Thereby, while increasing the electric power generation amount of the alternator 29, the diameter of the water pump pulley 52 can be prevented from being increased, which is advantageous in terms of the layout to the vehicle 1.

At this time, the oil pan 22 joined to a mounting flange (not shown) formed around the lower opening of the cylinder block 20 is a triangle positioned on the front side of the vehicle as shown in FIGS. 9, 10, and 12. The front part 57 of the shape and the triangular rear surface part 58 positioned on the rear side of the vehicle, the upper surface part 59 continuous with the respective sides on the upper side of the front part 57 and the rear surface part 58, and under the front part 57 and the rear surface part 58 And a bottom surface portion 60 that continues to one side of the top surface 59 and extends in the front-rear direction of the vehicle, and is a front projecting portion 61 that is a front extending portion that extends obliquely forward from the front surface portion 57 to the vehicle. It has.
The oil pan 22 is formed in a triangular cross section by extending the bottom surface portion 60 in a direction away from the crankshaft 10 from a case side boss portion 71 described later.
The oil pan 22 is formed with an upper surface opening 62 that is surrounded by the front surface portion 57 and the rear surface portion 58 and the upper surface portion 59 and the bottom surface portion 60 and opens upward, and the cylinder block 20 is mounted around the upper surface opening 62. A mounting flange 63 to be attached to the flange is provided, a mating surface 64 with the cylinder block 20 is formed on the mounting flange 63, and a mounting boss portion 65 is formed on the mounting flange 63.
Further, the mounting flange 63 of the oil pan 22 is formed so that the portion located on the vehicle rear side (transmission case side) is thicker than the portions located on the intake side and exhaust side (both sides in the width direction) of the cylinder block 20. is doing.
The oil pan 22 joins the mating surface 64 of the mounting flange 63 to the mating surface (not shown) of the cylinder block 20, and engages the mounting bolt inserted through the mounting boss portion 65 with the mounting boss portion of the cylinder block 20. The cylinder block 20 is attached by tightening.
Further, as shown in FIG. 9, the oil pan 22 has a bottom opening 66 formed on the vehicle front side (chain cover side) of the bottom surface portion 60, and a mounting flange 67 is provided around the bottom opening 66. A mounting boss portion 68 is formed.
A closing member 91 made of a plate member to be described later is attached to the attachment flange 67 of the bottom surface portion 60.
The closing member 91 has the mounting flange abutted against the mounting flange 67 of the bottom surface portion 60, passes a mounting bolt through a mounting boss portion (not shown) formed on the mounting flange, and the mounting boss portion 68 of the bottom surface portion 60. The bottom opening 66 is closed by engaging and tightening.
Therefore, the oil pan 22 stores oil therein.

Further, the oil pan structure of the engine 9 includes an end surface of the other end wall (not shown) positioned on the vehicle rear side (transmission case side) of the cylinder block 20 and a rear surface portion of the oil pan 22 positioned on the vehicle rear side. A case-side mounting surface (not shown) and a case-side mounting surface 70 are provided on the end surface of 58, respectively.
The case side mounting surface of the cylinder block 20 and the case side mounting surface 70 of the oil pan 22 are end surfaces located on the vehicle front side (engine side) of a transmission case (not shown) of an automatic transmission (not shown). It is joined to the engine side mounting surface (not shown) provided in the.
The case-side mounting surface of the cylinder block 20 is formed in a substantially C-shape that opens toward the lower portion of the cylinder block 20 when viewed from the axial direction of the crankshaft 10, and is connected to the transmission case. (Not shown).
Further, the case-side mounting surface 70 of the oil pan 22 is continuous with the lower left end of the case-side mounting surface of the cylinder block 20 and in the vicinity of the joint surface with the oil pan 22 when viewed from the axial direction of the crankshaft 10. A case-side boss portion 71 formed in an arc shape and connected to the transmission case is provided so as to reach the center between the two case-side boss portions on both sides in the width direction of the cylinder block 20 disposed in the cylinder block 20.
Further, the oil pan 22 is formed in a triangular cross section by extending the bottom surface portion 60 in a direction away from the crankshaft 10 from the case side boss portion 71.
At this time, the engine-side mounting surface of the transmission case is formed in a substantially annular shape so as to join the case-side mounting surface of the cylinder block 20 and the case-side mounting surface 70 of the oil pan 22. An engine-side boss portion (not shown) is provided so as to match the side boss portion and the case-side boss portion 71 of the oil pan 22.

Further, as shown in FIG. 12, the oil pan 22 has a recess 72 formed on the transmission case side of the upper surface portion 59 disposed above the axis C of the cylinder bore of the engine 9. It is arranged continuously with a work opening (not shown) of the case.
The recess 72 includes a flange wall 73 formed continuously along the mounting flange 63 of the oil pan 22 attached to the cylinder block 20 in parallel with the mounting flange 63, and an upper surface portion from the flange wall 73. A flat plate wall 74 that extends in the radial direction of the crankshaft 10 so as to be substantially parallel to the crankshaft and constitutes the bottom surface of the recess 72, and the crankshaft between the flat plate wall 74 and the upper surface 59 of the oil pan 22. 10 and a vertical wall portion 75 extending in the radial direction and continuing the step between the flat plate wall portion 74 and the upper surface portion 59.
The upper surface 59 of the oil pan 22 is formed one step higher than the recess 72 through the vertical wall 75, and the oil in the oil pan is configured to accumulate on the engine side from the automatic transmission side.
Further, an upper surface portion 59 of the engine-side oil pan 22 continuously formed from the vertical wall portion 75 and higher than the concave portion 72 is extended in the longitudinal direction of the crankshaft with substantially the same width as the concave portion 72. The mounting bracket 27 is disposed on the surface.
Further, the upper surface portion 59 has a lateral protrusion 76 that is a laterally extending portion by extending a portion in front of the upper portion of the oil pan 22 where the mounting bracket 27 is disposed to the right in the width direction. Forming and securing the required amount of oil.
The side protrusions 76 continue to the cylinder block 20 to which the chain cover 77 is attached. The side protrusions 76 protrude from the recesses 72 in the width direction on the front side of the chain cover 77 side, but are positioned on the inner side of the side protrusions 76. A front protrusion 61 is formed.
The oil pan 22 is disposed such that the flat plate wall 74 is closer to the cylinder axis C side, which is the axis of the cylinder bore, than the upper surface 59 of the oil pan 22 when viewed from the axial direction of the crankshaft 10.
The oil pan 22 is provided with a case-side boss 71 continuous on the same plane as the flat plate wall 74.
The oil pan 22 is oil in the center between two case-side boss portions located on both sides in the width direction of the cylinder block 20 disposed in the vicinity of the joint surface with the oil pan 22 when viewed from the axial direction of the crankshaft 10. In order to position the case-side boss portion 71 of the pan 22, the case-side boss portion 71 of the oil pan 22 is disposed in the vicinity of the cylinder axis C.
Thus, this oil pan structure is provided with the case-side boss portion 71 of the oil pan 22 being continuous with the flat plate wall portion 74 of the oil pan 22 on the same plane.
Therefore, the rigidity of the case-side boss portion 71 of the oil pan 22 is improved to enhance the coupling rigidity between the oil pan 22 and the transmission case.
In addition, the concave portion 72 that is recessed to the vicinity of the cylinder axis C is formed, and the opening area of the working opening is widened to simplify the coupling work between the torque converter and the drive plate.
Further, the oil pan structure is provided in the center of the case-side boss portion of the cylinder block 20 provided in the vicinity of the joint surface with the oil pan 22 as viewed from the axial direction of the crankshaft 10, that is, on both sides in the width direction of the cylinder block 20. The case-side boss portion 71 of the oil pan 22 is disposed at a substantially equal position from the two case-side boss portions.
Therefore, the case-side boss portion 71 of the oil pan 22 can be arranged in a balanced manner with respect to the transmission case, and the tightening force can be efficiently applied to the transmission case without increasing the number of case-side boss portions. The number of case-side boss portions 71 of the oil pan 22 can be reduced.

Furthermore, in the oil pan structure, as shown in FIG. 12, the flat plate wall rib 78 extending from the case side boss portion 71 of the oil pan 22 to the vertical wall portion 75 side in the axial direction of the crankshaft 10. The flat plate wall rib 74 is connected to the vertical wall portion 75.
Thus, this oil pan structure can further improve the coupling rigidity between the oil pan 22 and the transmission case by extending the plate wall rib 78 from the case-side boss portion 71 of the oil pan 22. The radiated sound generated from the flat plate wall portion 74 of the oil pan 22 can be reduced.

In addition, as shown in FIG. 12, the oil pan structure projects the case-side boss portion 71 of the oil pan 22 upward from the flat plate wall portion 74 to form a semi-cylindrical protruding portion 79. A semi-cylindrical engaging portion (not shown) that engages with the protruding portion 79 is formed on the side wall portion of the closing plate, and the plate is moved to the case-side boss portion 71 by the engagement between the protruding portion 79 and the engaging portion. They are joined together.
In this way, this oil pan structure has the case-side boss portion 71 of the oil pan 22 protruding upward from the flat plate wall portion 74 to engage the plate. Positioning can be performed and plate mounting workability can be improved.

9, 10, and 12, the oil pan 22 has a shallow bottom portion 80 on the transmission case side and a depth on the chain cover 77 side on the bottom surface portion 60 facing the top surface portion 59 of the oil pan 22. A bottom 81 is formed through a step 82.
At this time, the deep bottom portion 81 is set to have a greater depth from the upper surface portion 59 than the shallow bottom portion 80, and is formed by the closing member 91.
Therefore, in the oil pan structure, the deep bottom portion 81 of the oil pan 22 is formed on the chain cover 77 side of the bottom surface portion 60 facing the top surface portion 59 of the oil pan 22, and the hollow portion 83 protruding in the direction of the deep bottom portion 81 An oil strainer mounting flange 84 is provided on the upper surface 59 of the pan 22, and an oil strainer mounting flange 84 is mounted on the inner surface of the recess 83, and an oil strainer 85 is mounted on the oil strainer mounting flange 84.
Thus, in this oil pan structure, since the deep bottom portion 81 of the oil pan 22 is formed on the chain cover 77 side, the shallow bottom portion of the oil pan 22 on the transmission case side, which is the side away from the deep bottom portion 81. By reducing the volume of 80 by the recess 72, oil can be stored as much as possible on the deep bottom 81 side, and oil can be efficiently sucked from the oil strainer 85 to the engine 9 side.

The oil pan 22 is provided with a front protruding portion 61 that extends from the front surface portion 57 so as to incline toward the vehicle front side. In order to increase the amount of oil that can be stored in the oil pan 22, the front protruding portion 61 is formed continuously with the deep bottom portion 81 of the oil pan 22, is closed by a closing member 91 made of a plate member, and is stored inside the storage portion 86. Part of A filter mounting portion 38 is provided on the front protruding portion 61.
As shown in FIG. 1, the oil filter 39 is attached to the filter attaching portion 38 so as to protrude to the front side of the vehicle.
As shown in FIG. 2, an oil filter 39 is attached to the front surface of the engine mounted in a vertically mounted state in the engine room formed under the front seat, and this oil filter 39 is located at the center in the vehicle width direction behind the front wheels. In particular, it is located at a position where it can easily receive stepping stones when the front wheels turn left and right.
In addition, the portion of the oil pan 22 where the recess 83 is formed is wider in the vehicle width direction (left-right direction) than the engine side where the front protrusion 61 is formed and the automatic transmission side where the recess 72 is formed. ) Is formed so as to protrude.
Between the lateral protrusion 76 and the recess 72, the left and right direction is substantially the same length as the recess 72, and the vertical direction is the upper surface of the oil pan 22 where the recess 83 of the oil pan 22 is formed. 59 is formed on the same plane, and the mount bracket 27 is disposed on the upper side thereof.

Further, the oil pan 22 formed in a triangular shape when viewed from the axial direction of the crankshaft 10 is arranged below the first and second crank pulleys 53 and 54 as shown in FIGS. Set up.
The oil pan 22 has a tilt engine oil filter mounting structure provided with a reservoir 86 for storing oil.

At this time, the front surface of the oil pan 22 and at least a portion disposed below the cylinder axis C is bulged in the longitudinal direction of the crankshaft 10 in a direction away from the front surface of the chain cover 77, and the front side. Protruding portion 61 is formed, and the storage portion 86 is provided on the front protruding portion 61 and the bottom surface portion 60 which is the bottom of the oil pan 22, and the upper surface of the front protruding portion 61 has a triangular shape in side view. A filter recess 87 is provided in a portion near the mating surface 64 of the oil pan 22, that is, a corner formed by the mating surface 64 of the oil pan 22 and the bottom surface of the deep bottom portion 81 of the oil pan 22. The oil pan 22 mating surface 64 side is formed with a communication hole 93 connected to a block oil passage (not shown) formed in a cylinder block or the like on the chain cover 77 side. That is, an inclined surface 89 is formed so that the concave portion becomes deeper as it approaches the top of the oil pan 22, and an oil filter mounting hole 90 is provided in the filter mounting portion 38 of the inclined surface 89. The oil filter 39 is attached, the oil filter 39 is accommodated in the filter recess 87, and the oil filter 39 is disposed obliquely below the crankshaft 10 in the width direction of the vehicle 1.
More specifically, in the mounting flange 67 of the bottom surface portion 60 of the oil pan 22, as shown in FIG. 9, the front protrusion 61 is formed on the right side and the front part, and on the rear side of the front protrusion 61. The lateral protrusion 76 is located and protrudes to the right.
As a result, the side protrusions 76 expand the bottom surface 60 of the oil pan 22 and contribute to an increase in the amount of oil contained in the oil pan 22.
As shown in FIG. 8, the oil pan 22 abuts the bottom opening 66 by bringing the closing member 91 made of a plate member into contact with the mounting flange 67 of the bottom surface portion 60, and the bottom surface that is the bottom of the oil pan 22. The storage part 86 is provided in the part 60.
Further, as shown in FIG. 1, a filter recess 87 is provided on the upper surface of the front protruding portion 61, and an inclined surface 89 is provided on the chain cover 77 side of the filter recess 87 as shown in FIGS. .
In FIG. 1, an arrow A portion shows the shape of the lower protrusion of the oil filter 39, and this portion is integrally formed with the oil pan 22 and serves as an oil filter cover for the oil filter 39. It is a part that is formed to protrude to function.
Furthermore, an oil filter mounting hole 90 is provided in the filter mounting portion 38 of the inclined surface 89 as shown in FIG.
Then, the oil filter 39 is attached to the oil filter mounting hole 90, and the oil filter 39 is accommodated in the filter recess 87. As shown in FIGS. 3 and 5, the oil filter 39 is placed in the width direction of the vehicle in the crankshaft. 10 diagonally below.

Therefore, by forming the front protrusion 61 on the front surface of the oil pan 22, the amount of oil that can be stored in the oil pan 22 can be increased, and the oil filter 39 is attached to the front protrusion 61. As a result, it can be attached to the oil pan 22 without affecting the overall height of the engine, and the lower portion of the oil filter 39 can be protected by the filter recess 87 to prevent the oil filter 39 from being damaged by a stepping stone or the like.
The oil filter 39 is disposed on the front side in the rotational direction from the first and second crank pulleys 53 and 54, which are crank pulleys. Therefore, the oil filter 39 is caused by cold air generated by the rotation of the first and second crank pulleys 53 and 54. The oil filter 39 can be cooled, and the temperature of the oil in the oil filter 39 can be lowered.
Furthermore, by providing an inclined surface 89 on the chain cover 77 side of the filter recess 87 and attaching the oil filter 39, the oil filter 39 can be accommodated in the filter recess 87 without affecting the amount of oil stored, and the filter The protrusion amount of the oil filter 39 protruding from the recess 87 can be suppressed.

Further, in this embodiment, the engine 9 is mounted in a vertical position, and the cylinder block 20 of the engine 9 or the lower case, for example, the mating surface 64 of the oil pan 22 joined to the mating surface of the cylinder block 20 is used as the oil. An oil passage (not shown) on the engine body side is provided on the lower mating surface 92 provided along the opening 88 of the pan 22 to constitute the mating surface 64 of the oil pan 22 and disposed below the crankshaft 10. The oil passage boss 95 is formed on the inner surface of the oil pan 22, and the oil pan boss portion 95 is formed. The oil pan boss portion 95 is formed to communicate with the communication hole 93 and the oil filter mounting hole 90. It is formed by bulging toward the oil strainer 85 disposed in the storage portion 86 of the oil pan 22.
That is, as shown in FIGS. 8 and 10, when the mating surface 64 is formed along the opening 88 of the oil pan 22, a portion of the mating surface 64 disposed below the crankshaft 10 is positioned below. The side mating surface 92 is used.
The lower mating surface 92 is formed with a communication hole 93 that communicates with the oil passage on the engine body side, as shown in FIGS.
At this time, as shown in FIGS. 8 and 10, the communication hole 93 includes a first communication hole 93-1 for oil to flow from the oil strainer 85 side to the oil filter 39 side, and oil from the oil filter 39 side to the engine body. It has the 2nd communicating hole 93-2 for flowing to the side.
In addition, an oil pan oil passage 94 formed in the first oil passage boss 95-1 for communicating the communication hole 93 and the oil filter mounting hole 90, as shown in FIGS. The first oil pan oil passage 94-1 communicates with the first communication hole 93-1, and the second oil pan oil passage 94-2 communicates with the second communication hole 93-2.
Further, the first oil passage boss 95-1 bulges the inner surface of the oil pan 22 toward the oil strainer 85 disposed in the storage portion 86 of the oil pan 22, as shown in FIGS. And a first oil passage boss 95-1 having first and second oil pan oil passages 94-1 and 94-2 formed therein.
More specifically, the inner surface on the chain cover 77 side extending continuously upward from the lower mating surface 92 of the oil pan 22 is bulged toward the oil strainer 85 so as to cover the deep bottom 81 of the oil pan 22. 1 oil passage boss 95-1 is formed.
Accordingly, the first oil passage boss portion 95-1 is positioned on the upper surface of the deep bottom portion 81 of the oil pan 22.
Also, the first oil passage boss 95-1 and the communication hole 93 are formed by forming the communication hole 93 in a position close to the shallow bottom portion 80 of the oil pan 22 so as to be partially continuous with the lower mating surface 22. Is disposed in an opening 88 formed along the mating surface 64 of the oil pan 22 so as to block a part of the opening 88.
Further, the first communication hole 93-1 is arranged closer to the oil filter 39 side than the second communication hole 93-2.

  Therefore, the first oil passage boss 95-1 is formed by bulging from the lower mating surface 92 of the oil pan 22 toward the oil strainer 85, thereby baffle the first oil passage boss 95-1. The function of the plate can be provided, and the oil in the reservoir 86 of the oil pan 22 can be prevented from escaping from the opening 88 side of the oil pan 22 to the cylinder block or the like when turning left and right.

Further, the upper surface of the oil pan 22 is recessed toward the storage portion 86 side of the oil pan 22 and a strainer recess 96 is disposed closer to the chain cover 77 side than the transmission side, and the strainer recess 96 is disposed on the inner surface of the strainer recess 96. An attachment flange 97 is provided, and the oil strainer 85 is attached to the strainer attachment flange 97.
That is, on the upper surface of the oil pan 22, as shown in FIGS. 7 and 12, the strainer recess 96 is formed by being recessed toward the storage portion 86 side of the oil pan 22, and the formation position of the strainer recess 96 is changed. Move closer to the chain cover 77 side than the machine side.
The opening 88 formed along the mating surface of the oil pan 22 has a deep bottom portion by a first oil passage boss 95-1 and a strainer concave portion 96 disposed on the upper surface of the deep bottom portion 81 in which oil is stored. The opening area of the opening portion 100 of the 81 is narrowed in the vertical direction so that the oil stored in the storage portion 86 does not flow out to the cylinder block side through the opening portion 88 of the oil pan 22.
Further, the first oil pan oil passage 94-1 and the second oil pan oil passage 94-2 are disposed on the upper surface of the reservoir 86 of the oil pan 22 so as to be adjacent to each other in the cylinder axial direction. Since the boss portion 94-1 is swelled and arranged also in the cylinder axial direction, the boss portion 94-1 does not easily flow out to the cylinder block side.
More specifically, when the engine is arranged vertically, the top of the oil pan 22 is located on the right side and the mating surface 64 of the oil pan 22 is located on the left side. When it does, it tries to flow to the left side.
However, the oil flow is hardly caused by the oil pan when turning right, and the first oil passage boss 94-1 is turned back when turning left, and the oil flowing to the left is the first oil passage. The baffle prevents the oil from flowing out to the cylinder block side and prevents the oil from flowing out to the cylinder block because it collides with the boss portion 94-1 and bounces back to the storage portion 86 side (downward) of the oil pan 22. No plate is required.
Further, as shown in FIGS. 7 to 10, a strainer mounting flange 97 is provided on the inner surface of the strainer recess 96, and the oil strainer 85 is attached to the strainer mounting flange 97 via an oil suction pipe 98.
And the 2nd oil passage boss | hub part 95-2 is provided along the approximate center of the front side wall surface (wall surface by the side of a chain cover) which comprises the strainer recessed part 96, and this boss | hub part 95-2 for this 2nd oil passage is continued. A third oil passage boss 95-3 is provided at the front end portion of the upper surface of the oil pan 22 along the upper surface of the oil pan 22, and a third communication hole is a downstream end of the third oil passage boss 95-3. 101 is provided at the corner of the mating surface 64 of the oil pan 22 where the upper mating surface disposed above the cylinder axis and the front mating surface formed between the upper mating surface and the lower mating surface intersect. The third communication hole 101 is connected to an oil pump inlet passage (not shown) provided in the cylinder block or the like.

Accordingly, since the oil strainer 85 is installed close to the storage portion 86 side of the oil pan 22, the pipe of the oil strainer 85 can be formed short, and the strainer recess 96 is formed on the upper surface of the oil pan 22. The rigidity of the oil pan 22 can be improved.
In addition, the strainer recess 96 can prevent the oil around the oil strainer 85 from colliding with the strainer recess 96 and turning the oil away from the oil strainer 85 as much as possible. The amount of oil stored around the oil pan 22 can be secured, and the rigidity of the oil pan 22 can be improved.

The oil sucked up from the strainer 85 is supplied to the second oil passage boss 95-2 and the third oil passage boss 95-. 3 flows through the third oil pan oil 94-3 passage formed in No. 3, and flows into the oil pump inlet passage (not shown) through the third communication hole. The oil pump inlet passage communicates with an oil pump formed in the chain cover, and the oil pressurized by the oil pump is an oil pump outlet passage (not shown) formed in a cylinder block and the oil pump outlet passage. And the first oil pan oil passage 94-1 communicating with each other through the one communication hole 95-1, and flows into the oil filter 39.
The oil purified by the oil filter 39 flows through the second oil pan oil 94-2 passage and is supplied to a block oil passage (not shown) formed in a cylinder block or the like that communicates with the second communication hole 95-2. The block oil passage is supplied to each part of the engine.

Furthermore, in the storage portion 86 of the oil pan 22, as shown in FIG. 7, a closing member 91 made of a plate member that closes the bottom surface portion 60 of the oil pan 22 is attached and protrudes upward to the closing member 91. Oil level ribs 99 are provided.
At this time, the oil level rib 99 is disposed so as to surround the oil strainer 85 as shown in FIG.
Therefore, since the oil flow in the oil pan 22 is suppressed by the oil level rib 99, it is possible to maintain good suction efficiency of the oil strainer 85.

  The present invention is not limited to the above-described embodiments, and various application modifications are possible.

For example, the auxiliary machine layout described in the embodiment of the present invention may be used for other layouts such as a midship layout and an RR layout to have a special configuration that suppresses the overall engine height.
In addition, it is possible to increase the oil temperature reduction effect in the oil filter by specially forming a cooling part having a fin shape or the like in the crank pulley.

It is a schematic perspective view of the oil filter attachment state of the oil filter attachment structure of the inclination engine which shows the Example of this invention. It is a right view of a vehicle. It is a partial tilt view of an engine. It is a right view of an engine. It is a front view of an engine. It is a rear view of an engine. It is a schematic sectional drawing of the front side protrusion part of an oil pan. It is a schematic perspective view of the state seen from the mating face side of the oil pan. It is the perspective view of the state seen from the bottom face side of the oil pan which removed the closure member which consists of a plate member. It is a front view of an oil pan. It is a principal part expanded sectional view by the 11-11 line of FIG. It is a top view of an oil pan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 7 Floor 8 Engine room 9 Engine 10 Crankshaft C Cylinder axis V Vertical line 20 Cylinder block 21 Cylinder head 22 Oil pan 23 Cylinder head cover 24 Intake manifold 25 Branch pipe 26 Surge tank 27 Mount bracket 28 Exhaust manifold 29 Alternator 38 Oil filter Mounting portion 39 Oil filter 41 Air conditioning compressor 47 Auxiliary equipment support bracket 50 Water pump 53 First crank pulley 54 Second crank pulley 55 First belt 56 Second belt 61 Front protrusion 76 Side protrusion 77 Chain cover 84 Oil strainer Mounting flange 85 Oil strainer 86 Reservoir 87 Filter recess 88 Opening 89 Inclined surface 90 Oil filter mounting hole 91 Closure member 92 Bottom Mating surfaces 93 communication hole 94 oil pan oil passage 95 an oil passage boss portion 96 strainer recess 97 strainer mounting flange 98 oil suction pipe

Claims (3)

The engine is mounted with the cylinder axis passing through the crankshaft inclined at a predetermined angle from the vertical direction, and a crank pulley attached to the shaft end of the crankshaft is disposed on the front of the chain cover attached to the front of the engine. An oil filter mounting structure for an inclined engine in which an oil pan formed in a triangular shape as viewed from the axial direction of the crankshaft is disposed below the crank pulley, and a reservoir for storing oil is provided in the oil pan in the a front surface of the oil pan to form a front protruding portion that bulges in a direction away from the front surface of the chain cover in the longitudinal direction of the crankshaft on a portion which is disposed below the at least the cylinder axis, Providing the reservoir on the front protrusion and the bottom of the oil pan, and providing a filter recess on the top surface of the front protrusion, The chain cover side of the filter concave portion is provided an inclined surface, the oil filter mounting holes provided in the inclined surface, the filter recess the lower portion of at least the oil filter mounting hole near one of the oil filter coupled to the oil filter mounting hole An oil filter mounting for a tilt engine , wherein the oil filter is disposed in the filter recess and is placed in an obliquely lower portion of the crankshaft in a vehicle width direction. Construction.   The engine is mounted in a vertical state, a block side mating surface is provided on the cylinder block or lower case of the engine, and an oil pan side mating surface is provided on the oil pan to be joined to the block side mating surface. A pan-side mating surface is provided with a lower mating surface disposed below the cylinder axis, a communication hole is provided continuously with the lower mating surface, and the communication hole is provided in the cylinder block or the lower case. An oil passage boss is formed in which an oil pan oil passage is formed to communicate with the oil passage on the engine body side, and the communication hole communicates with the oil filter mounting hole, and the inner surface of the oil pan is connected to the oil pan storage portion. 2. The oil filter mounting structure for a tilt engine according to claim 1, wherein the oil filter mounting structure is formed so as to bulge toward an oil strainer disposed on the inclined engine. The oil forming the oil pan strainer recess recessed reservoir side of the upper surface of the pan, and disposed near the strainer recess on the side of the chain cover from the side of the transmission case mounted on the rear surface of the engine , oil filter mounting structure of the tilt engine according to claim 1, wherein the strainer mounting flange provided on the inner surface of the strainer recess, characterized in that attaching the oil strainer to the strainer mounting flange.