JP2020176540A - Vehicular engine - Google Patents

Abstract

To provide a vehicular engine capable of preventing water which has entered an air cleaner from being delivered to an engine body, without increasing height dimension of the air cleaner.SOLUTION: In an engine 3, an air cleaner 30 includes: a lower case 31; an upper case 32; and a filter element 33 held by a joint part 30B of them. A bottom wall of the lower case 31 includes: a front part bottom wall 31F extending in parallel with an upper surface of a cylinder head cover 13; and a rear part bottom wall 31E extending obliquely downward on the rear side from a rear end of the front part bottom wall 31F. An air inlet 31B is arranged at one side part in a vehicle width direction of the lower case 31, and opens facing the lateral side so as to take in air at a position above the rear part bottom wall 31E in the vehicular longitudinal direction. An air outlet 32B is arranged in the vicinity of the other side part in the vehicle width direction of the upper case 32, and opens facing the rear side so as to take out the air from a position above the front part bottom wall 31F in the vehicular longitudinal direction.SELECTED DRAWING: Figure 7

Description

The present invention relates to a vehicle engine.

Conventionally, as a technique for preventing rainwater from entering an air cleaner in a vehicle engine mounted on a vehicle, the one described in Patent Document 1 is known.

In the one described in Patent Document 1, the air cleaner includes a lower case provided with an air inlet, an upper case provided with an air outlet, and a filter element interposed between the upper case and the lower case. ing.

Further, in the case described in Patent Document 1, an air inlet is provided on the side surface portion or the bottom portion of the lower case, and the air flowing in from the air inlet is once directed downward by the guide portion provided in the lower case below the filter element. After changing the direction, it is turned upward.

JP-A-2018-84200

However, in the case described in Patent Document 1, although it is possible to prevent rainwater from being sent from the air cleaner to the engine, it is necessary to change the direction of the air in the lower case in the vertical direction, so that the height in the lower case is increased. There is a problem that the dimension in the direction becomes large and it becomes difficult to mount the air cleaner on the upper part of the engine.

The present invention has been made in view of the above circumstances, and provides a vehicle engine capable of preventing water that has entered the air cleaner from being sent to the engine without increasing the height dimension of the air cleaner. The purpose is to do that.

The present invention includes an engine body, a cylinder head cover arranged on the upper part of the engine body, and an air cleaner arranged on the upper part of the cylinder head cover. The air cleaner has an air inlet and is an upper part of the engine body. A vehicle engine having a lower case arranged in, an upper case having an air outlet and joined to the upper part of the lower case, and a filter element held at a joint portion between the lower case and the upper case. The bottom wall forming the bottom surface of the lower case extends parallel to the upper surface of the cylinder head cover, and forms the front portion of the bottom wall with the front bottom wall and the rear diagonally downward side from the rear end of the front bottom wall. Has a rear bottom wall that extends to and forms the rear portion of the bottom wall, the air inlet is located on one side of the lower case in the vehicle width direction and is located above the rear bottom wall in the vehicle front-rear direction. The air outlet is arranged in the vicinity of the other side portion of the upper case in the vehicle width direction, and the air is arranged from a position above the front bottom wall in the vehicle front-rear direction. The lower surface of the filter element is lower than the front side in the vehicle front-rear direction, and the lower surface of the filter element is lower than the one side side in the vehicle width direction. It is characterized in that the filter element is tilted so as to be.

As described above, according to the present invention, it is possible to prevent the water that has entered the air cleaner from being sent to the engine without increasing the height dimension of the air cleaner.

FIG. 1 is a front view of a vehicle engine according to an embodiment of the present invention. FIG. 2 is a rear view of a vehicle engine according to an embodiment of the present invention. FIG. 3 is a right side view of a vehicle engine according to an embodiment of the present invention. FIG. 4 is a left side view of a vehicle engine according to an embodiment of the present invention. FIG. 5 is a plan view of a vehicle engine according to an embodiment of the present invention. FIG. 6 is a right side view of an air cleaner for a vehicle engine according to an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line XX of FIG. FIG. 8 is a cross-sectional view taken along the line in the XI-XI direction of FIG. FIG. 9 is a cross-sectional view taken along the line in the XII-XII direction of FIG. FIG. 10 is a plan view of a lower case and a filter element of an air cleaner for a vehicle engine according to an embodiment of the present invention.

A vehicle engine according to an embodiment of the present invention includes an engine body, a cylinder head cover arranged on the upper part of the engine body, and an air cleaner arranged on the upper part of the cylinder head cover, and the air cleaner provides an air inlet. A vehicle engine having a lower case arranged at the upper part of the engine body, an upper case having an air outlet and being joined to the upper part of the lower case, and a filter element held at a joint between the lower case and the upper case. The bottom wall forming the bottom surface of the lower case extends parallel to the upper surface of the cylinder head cover, and the front bottom wall forming the front part of the bottom wall and the front bottom wall diagonally downward from the rear end of the front bottom wall. It has a rear bottom wall that extends and forms the rear part of the bottom wall, and the air inlet is located on one side of the lower case in the vehicle width direction to take in air above the rear bottom wall in the vehicle front-rear direction. It opens toward the side, and the air outlet is located near the other side of the upper case in the vehicle width direction, and opens backward so that air is taken out from the position above the front bottom wall in the front-rear direction of the vehicle. However, the filter element is tilted so that the lower surface of the filter element is lower than the front side in the vehicle front-rear direction and the lower surface of the filter element is lower in the vehicle width direction than the one side side. It is a feature. Thereby, the vehicle engine according to the embodiment of the present invention can prevent the water that has entered the air cleaner from being sent to the engine without increasing the height dimension of the air cleaner.

Hereinafter, a vehicle engine according to an embodiment of the present invention will be described with reference to the drawings. 1 to 10 are diagrams showing a vehicle engine according to an embodiment of the present invention. In FIGS. 1 to 10, the up / down / front / rear / left / right directions are the up / down / front / rear / left / right directions of the vehicle engine installed in the vehicle, the direction orthogonal to the front / rear direction is the left / right direction, and the height direction of the vehicle engine is It is in the vertical direction.

First, the overall configuration will be described. In FIGS. 1 and 2, the engine 3 as a vehicle engine is composed of an engine main body 4, various parts such as an intake manifold 50 and an air cleaner 30, and the like. In FIG. 5, the engine 3 is arranged in the engine room 1A of the vehicle 1 in a so-called horizontal posture. The horizontal installation means that the cylinder row direction of the engine 3 and the vehicle width direction (left-right direction) of the vehicle 1 coincide with each other.

In FIGS. 1 and 2, the engine body 4 includes a cylinder block 11, a cylinder head 12, a cylinder head cover 13, and an oil pan 14.

The cylinder block 11 is provided with a plurality of cylinders (not shown). The engine 3 of this embodiment is composed of a three-cylinder engine having three cylinders, but is not limited to the three-cylinder engine.

A piston (not shown) is housed in the cylinder, and the piston reciprocates in the vertical direction with respect to the cylinder. The piston is connected to the crankshaft 11S (see FIG. 4) via a connecting rod (not shown), and the reciprocating motion of the piston is converted into the rotational motion of the crankshaft 11S via the connecting rod.

In FIGS. 1, 2, and 3, a chain case 7 is fastened to the right end of the cylinder block 11 in the cylinder row direction. A transmission (not shown) is fastened to the left end of the cylinder block 11 in the cylinder row direction.

The cylinder head 12 is arranged above the cylinder block 11. The cylinder head 12 is provided with a plurality of intake ports (not shown), a plurality of intake valves for opening and closing the intake ports, a plurality of exhaust ports, and a plurality of exhaust valves for opening and closing the exhaust ports.

In FIG. 1, an electric component 26 is provided on the front surface of the cylinder block 11. Further, a collective exhaust outlet 17 for exhausting exhaust gas is provided on the front surface of the cylinder head 12. The collective exhaust outlet 17 is open to the front side surface of the cylinder head 12 at the central portion in the cylinder row direction.

An exhaust manifold (not shown) is formed inside the cylinder head 12, and the exhaust manifold is a collection of a plurality of exhaust ports (not shown) that communicate with the cylinder. Further, the exhaust manifold leads to the collective exhaust outlet 17.

As described above, the exhaust manifold is formed inside the cylinder head 12 integrally with the exhaust port. The exhaust gas (also referred to as exhaust gas or exhaust gas) discharged from each cylinder is merged by the exhaust manifold inside the cylinder head 12 and discharged from the collective exhaust outlet 17.

An oil pan 14 is arranged under the cylinder block 11, and the oil pan 14 stores lubricating oil. A cylinder head cover 13 is arranged on the upper side of the cylinder head 12.

In FIGS. 1 to 5, the engine 3 includes an intake pipe 40, an air cleaner inlet hose 52, an air cleaner 30, an air cleaner outlet hose 53, a throttle body 51, and an intake manifold 50 in addition to the engine body 4.

The air cleaner 30 is connected to the intake pipe 40 via the air cleaner inlet hose 52, and filters the air (outside air) taken in from the intake pipe 40. Further, the air cleaner 30 is connected to an intake port (not shown) of the cylinder block 11 via an air cleaner outlet hose 53, a throttle body 51 and an intake manifold 50, and the air filtered by the air cleaner 30 is introduced into the intake port. ..

The air cleaner 30 is formed in a rectangular box shape as a whole, and is arranged above the cylinder head cover 13.

The intake pipe 40 is arranged on the right side of the air cleaner 30 in a posture extending in the front-rear direction. An intake port 40A opens to the right at the front end of the intake pipe 40.

The intake manifold 50 is connected to the rear surface of the cylinder head 12. The rear end of the intake pipe 40 is curved toward the left, and the air cleaner inlet hose 52 is connected to it. An air inlet pipe 31A is provided in the lower part of the right side surface of the air cleaner 30, and the air cleaner inlet hose 52 is connected to the air inlet pipe 31A.

In FIGS. 2, 4, and 5, the air cleaner 30 is provided with an air outlet pipe 32A in a posture extending rearward to the left, and an air cleaner outlet hose 53 is connected to the air outlet pipe 32A. The left rear end of the air cleaner outlet hose 53 is bent downward.

A throttle body 51 is arranged below the air cleaner outlet hose 53 and to the left rear of the engine body 4, and the upper end of the throttle body 51 is connected to the lower end of the air cleaner outlet hose 53.

In FIGS. 1, 2, and 4, the air cleaner 30 has an upper case 32 and a lower case 31 arranged on the lower surface of the upper case 32. The air outlet pipe 32A is provided in the upper case 32, and the air inlet pipe 31A is provided in the lower case 31.

The air cleaner 30 has an air inlet 31B (see FIG. 5) at the base end of the air inlet pipe 31A and an air outlet 32B (see FIG. 2) at the base end of the air outlet pipe 32A. As shown in FIG. 5, the air outlet pipe 32A is arranged in the recessed portion 32D which is recessed downward at the left rear end portion of the upper case 32.

In FIG. 2, the lower case 31 and the upper case 32 are joined in a closed state by engaging the engaging portions 31C and 32C provided on the rear surface side with each other and attaching a plurality of clips 66 to the side surface. Will be done.

In FIG. 1, the air cleaner 30 and the intake pipe 40 are fixed by fastening with fixing portions 35, 45 and bolts 61 to each other. The fixing portion 35 of the air cleaner 30 is integrally provided on the right side surface of the lower case 31.

In FIG. 3, a resonator 46 is integrally provided on the lower surface of the intake pipe 40, and the resonator 46 reduces intake noise by utilizing the resonance effect. The intake pipe 40 is curved so as to surround the resonator 46 from above.

In FIG. 1, a recessed portion 46A recessed to the right is provided at a lower portion of a side portion (left end portion) of the resonator 46 facing the cylinder head cover 13 in the vehicle width direction. Branch harnesses 22 and 23 (see FIG. 5), which will be described later, are arranged in the gap formed between the resonator 46 and the cylinder head cover 13 by the recessed portion 46A.

In FIGS. 1 and 5, a front mounting bracket 31G is provided on the front portion of the lower case 31 of the air cleaner 30, and the front mounting bracket 31G is fixed to the front portion of the upper surface of the cylinder head cover 13.

Two front mounting brackets 31G are provided at intervals in the vehicle width direction. The tip of the front mounting bracket 31G is fixed to the upper end of the pedestal portion 13C formed at the front end portion of the upper surface of the cylinder head cover 13 by a bolt 62.

The lower end of the pedestal portion 13C is in contact with the cylinder head 12, and the pedestal portion 13C directly transmits the load acting from the front mounting bracket 31G to the cylinder head 12. Therefore, the load acting on the pedestal portion 13C from the front mounting bracket 31G is hardly transmitted to the portion of the cylinder head cover 13 other than the pedestal portion 13C.

In FIG. 4, a rear mounting bracket 31J projecting downward is integrally provided at the rear portion of the bottom of the lower case 31. Two rear mounting brackets 31J are provided at intervals in the vehicle width direction. The rear mounting bracket 31J is supported by the cylinder head 12 via the support member 55. In this way, the air cleaner 30 is fixed to the engine body 4 by the two front mounting brackets 31G and the two rear mounting brackets 31J.

In FIG. 4, the cylinder head cover 13 constituting the upper surface of the engine body 4 has a front side portion 13A and a rear side portion 13B that bulge upward. The front side portion 13A is a front portion of the upper surface of the cylinder head cover 13 and is arranged above the cam shaft 8A having the exhaust side cam 8C shown in FIG. 7.

Further, the rear side portion 13B is located at the rear portion of the upper surface of the cylinder head cover 13 and above the cam shaft 8B having the intake side cam 8D shown in FIG. 7. The front side portion 13A is formed so as to be higher than the rear side portion 13B.

The intake manifold 50 has a surge tank 50A and a plurality of branch pipes 50B connected to the surge tank 50A, and the lower end of the throttle body 51 is connected to the left end portion of the surge tank 50A. The plurality of branch pipes 50B are curved so as to cover the rear portion of the surge tank 50A and then extend upward, and their downstream ends are connected to each intake port on the rear surface of the cylinder head 12. An electrical component 27 (see FIG. 2) is attached to the intake manifold 50.

In FIGS. 1 and 5, the engine 3 includes a harness 20 that supplies electric power to electrical components 26 and the like. The harness 20 passes near the front end of the upper surface of the cylinder head cover 13 of the engine body 4 in the cylinder row direction (hereinafter, also referred to as the vehicle width direction), and passes in the front-rear direction near the right end of the upper surface of the cylinder head cover 13. It is laid out like this. The air cleaner 30 and the intake pipe 40 are arranged above the harness 20.

The harness 20 has a main harness 21 and branch harnesses 22 and 23. The main harness 21 is arranged near the front end portion of the upper surface of the cylinder head cover 13. The branch harnesses 22 and 23 and the cylinder head cover 13 are branched from the main harness 21 at the side end portion (right end portion). The branch harnesses 22 and 23 are connected to the electrical components 26 and 27 (see FIG. 2), respectively. The branch harnesses 22 and 23 are branched from the main harness 21 in the vicinity below the fixed portion 35 (see FIG. 5).

The diameter of the main harness 21 is larger than that of the branch harnesses 22 and 23. The main harness 21 is supported by the cylinder head 12 via a bracket 67 (see FIG. 4) at the upper part of the left end portion of the engine body 4.

The main harness 21 is arranged so as to pass through a gap formed between the front mounting bracket 31G and the cylinder head cover 13 by the recessed portion 31D of the lower case 31 of the air cleaner 30.

Further, the main harness 21 is covered from the front and above by the front mounting bracket 31G, is covered from below by the cylinder head cover 13, and is covered from above and behind by the lower case 31.

In FIG. 5, the branch harnesses 22 and 23 are branched from the main harness 21 in the vicinity below the fixed portion 35, and then between the resonator 46 and the cylinder head cover 13 by a recessed portion 46A (see FIG. 1) at the lower part of the resonator 46. It extends forward and backward, respectively, through the gaps formed in.

In FIG. 1, the branch harness 22 extends forward along the front of the vehicle and then downwards along the vicinity of the right end of the front surface of the cylinder head 12 and the cylinder block 11 and is connected to the electric component 26.

In FIG. 2, the branch harness 23 extends rearward of the vehicle, then extends to the left along the rear surface of the cylinder head 12, and is connected to the electric component 27 of the intake manifold 50.

Next, a detailed configuration not described in the above overall configuration will be described. In FIGS. 7 and 8, the air cleaner 30 has a flat plate-shaped filter element 33, and the filter element 33 is held in a state of being sandwiched between the joint portion 30B between the lower case 31 and the upper case 32.

In FIG. 7, the bottom surface of the lower case 31 is provided with a front bottom wall 31F forming the front part of the bottom wall and a rear bottom wall 31E forming the rear part of the bottom wall. The front bottom wall 31F extends parallel to the upper surface of the cylinder head cover 13. The rear bottom wall 31E extends obliquely downward on the rear side from the rear end of the front bottom wall 31F.

In FIG. 6, the air inlet 31B is arranged on one side (right side) of the lower case 31 in the vehicle width direction, and is lateral (right) so as to take in air at a position above the rear bottom wall 31E in the vehicle front-rear direction. It is open toward.

The air outlet 32B is arranged near the other side (left side) of the upper case 32 in the vehicle width direction, and opens rearward so as to take out air from a position above the front bottom wall 31F in the vehicle front-rear direction. ing.

The filter element 33 is tilted so that the lower surface of the filter element 33 is lower on the rear side than the front side in the vehicle front-rear direction, and the lower surface of the filter element 33 is lower on the other side than the one side in the vehicle width direction.

In FIGS. 7 and 9, a plurality of ignition coils 25 are arranged along the cylinder row on the upper portion of the cylinder head cover 13. The lower case 31 extends from a position above the ignition coil 25 to the rear side of the cylinder head cover 13 in the vehicle front-rear direction. The front bottom wall 31F is arranged above the ignition coil 25. The rear bottom wall 31E extends to a position behind the ignition coil 25. That is, the rear bottom wall 31E extends downward to a position behind the ignition coil 25.

In FIG. 10, the filter element 33 has a filter 33A and an outer frame portion 33B surrounding the outer circumference of the filter 33A. The outer frame portion 33B has a partition plate portion 33C for partitioning the internal space between the lower case 31 and the upper case 32 on the other side side of the filter 33A in the vehicle width direction.

In FIGS. 5 and 8, the upper case 32 has a recessed portion 32D. The recessed portion 32D is arranged on the other side of the rear edge of the upper case 32 in the vehicle width direction. In FIG. 8, it is recessed downward toward the partition plate portion 33C. An air outlet 32B (see FIG. 9) is arranged in the recessed portion 32D.

As described above, in the engine 3 of the present embodiment, the air cleaner 30 arranged on the upper part of the cylinder head cover 13 has an air inlet 31B and a lower case 31 arranged on the upper part of the engine body 4, and an air outlet 32B. It has an upper case 32 joined to the upper part of the lower case 31 and a filter element 33 held at the joint portion 30B between the lower case 31 and the upper case 32.

The bottom wall forming the bottom surface of the lower case 31 extends parallel to the upper surface of the cylinder head cover 13, and forms the front portion of the bottom wall with the front bottom wall 31F and the front bottom wall 31F diagonally from the rear end to the rear side. It has a rear bottom wall 31E that extends downward and forms the rear part of the bottom wall.

Further, the air inlet 31B is arranged on one side of the lower case 31 in the vehicle width direction, and is opened sideways so as to take in air at a position above the rear bottom wall 31E in the vehicle front-rear direction.

As a result, the air inlet 31B can be arranged at a position corresponding to the rear bottom wall 31E, which is the lowermost part of the lower case 31, so that the water that has entered the lower case 31 can be stored inside the rear bottom wall 31E. The structure can be made so that water does not easily flow into the upper case 32.

In the engine 3 of this embodiment, the air outlet 32B is arranged in the vicinity of the other side portion of the upper case 32 in the vehicle width direction, and is rearward so as to take out air from a position above the front bottom wall 31F in the vehicle front-rear direction. It is open facing you.

As a result, the air discharge direction from the air outlet 32B can be brought closer to the air intake direction from the air inlet 31B, and the air flow does not bend significantly inside the air cleaner 30. Therefore, from the front portion of the upper case 32. Air can easily flow to the air outlet 32B, and the ventilation resistance can be reduced.

In the engine 3 of the present embodiment, the lower surface of the filter element 33 is lower than the front side in the vehicle front-rear direction, and the lower surface of the filter element 33 is lower than the one side side in the vehicle width direction. The filter element 33 is tilted.

As a result, the gap between the front bottom wall 31F of the lower case 31 and the lower surface of the filter element 33 becomes larger toward the front side of the vehicle, so that the ventilation resistance can be reduced and the flow velocity of the air is slowed down from the air. Water can be easily separated.

Therefore, as shown by an arrow in FIG. 7, the air flowing into the lower case 31 from the air inlet 31B flows from the rear side to the front side of the lower case 31 on one side in the vehicle width direction of the lower case 31, and the front bottom wall of the lower case 31. It rises along 31F, passes through the filter element 33, and flows into the upper case 32. After that, the air in the upper case 32 curves to the rear of the vehicle along the upper wall of the upper case 32 and is sent to the engine body 4 through the air outlet 32B.

With the above structure, the ventilation resistance of the air passage from the lower case 31 to the upper case 32 can be reduced, and the flow velocity of the air is reduced, so that the water can be easily separated from the air, and the water rides on the air flow and the upper case 31 side. It is possible to prevent the flow to the case 32 side.

Further, the shape of the bottom wall of the lower case 31 and the simple structure of inclining the filter element 33 can prevent the movement of water from the lower case 31 side to the upper case 32 side, so that the height dimension of the air cleaner 30 is increased. There is nothing to do.

As a result, it is possible to prevent the water that has entered the air cleaner 30 from being sent to the engine body 4 without increasing the height dimension of the air cleaner 30.

In the engine 3 of the present embodiment, a plurality of ignition coils 25 are arranged along the cylinder row on the upper part of the cylinder head cover 13, and the lower case 31 is rearward of the cylinder head cover 13 from a position above the ignition coil 25 in the vehicle front-rear direction. It extends to the side. Further, the front bottom wall 31F is arranged above the ignition coil 25, and the rear bottom wall 31E extends behind the ignition coil 25.

Thereby, the air cleaner 30 can be arranged at a lower position than the case where the rear bottom wall 31E located at a position lower than the front bottom wall 31F is arranged above the ignition coil 25.

As a result, the effect of preventing the water that has entered the air cleaner 30 from being sent to the engine body 4 can be remarkably exhibited without increasing the height dimension of the air cleaner 30.

In the engine 3 of the present embodiment, the filter element 33 has a filter 33A and an outer frame portion 33B surrounding the outer circumference of the filter 33A, and the outer frame portion 33B provides an internal space between the lower case 31 and the upper case 32. The partition plate portion 33C for partitioning is provided on the other side of the filter 33A in the vehicle width direction.

The upper case 32 has a recessed portion 32D that is recessed downward toward the partition plate portion 33C on the other side of the rear side edge portion in the vehicle width direction, and the air outlet 32B is arranged in the recessed portion 32D. ing.

As a result, the air outlet 32B is arranged above the partition plate portion 33C of the filter element 33, so that it is possible to prevent the filter element 33 from being arranged so as to block the air outlet 32B.

As a result, it is not necessary to greatly incline the stretching direction 30C of the filter element 33 from the horizontal plane 30D, and it is not necessary to lower the position of the filter element 33 on the other end side (left end side) in the vehicle width direction more than necessary. The height dimension of the air cleaner 30 can be reduced.

Although the embodiments of the present invention have been disclosed, it is clear that some skilled in the art can make changes without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

3 ... Engine (vehicle engine), 4 ... Engine body, 13 ... Cylinder head cover, 25 ... Ignition coil, 30 ... Air cleaner, 30B ... Joint, 31 ... Lower case , 31B ... air inlet, 31E ... rear bottom wall, 31F ... front bottom wall, 32 ... upper case, 32B ... air outlet, 32D ... recess, 33 ... Filter element, 33A ... filter, 33B ... outer frame part, 33C ... partition plate part

Claims (3)

With the engine body
A cylinder head cover arranged on the upper part of the engine body and
With an air cleaner located on top of the cylinder head cover,
The air cleaner
A lower case that has an air inlet and is located above the engine body,
An upper case that has an air outlet and is joined to the upper part of the lower case,
A vehicle engine having a filter element held at a joint between the lower case and the upper case.
The bottom wall forming the bottom surface of the lower case extends parallel to the upper surface of the cylinder head cover, and forms the front portion of the bottom wall with the front bottom wall and diagonally downward from the rear end of the front bottom wall. It has a rear bottom wall that extends and forms the rear part of the bottom wall.
The air inlet is arranged on one side of the lower case in the vehicle width direction, and is opened laterally so as to take in air at a position above the rear bottom wall in the vehicle front-rear direction.
The air outlet is arranged in the vicinity of the other side portion in the vehicle width direction of the upper case, and opens rearward so as to take out air from a position above the front bottom wall in the vehicle front-rear direction.
The filter element is tilted so that the lower surface of the filter element is lower on the rear side than the front side in the vehicle front-rear direction, and the lower surface of the filter element is lower on the other side than the one side in the vehicle width direction. A vehicle engine characterized by being A plurality of ignition coils are arranged along the cylinder row on the upper part of the cylinder head cover.
The lower case extends from a position above the ignition coil to the rear side of the cylinder head cover in the vehicle front-rear direction.
The vehicle engine according to claim 1, wherein the front bottom wall is arranged above the ignition coil, and the rear bottom wall extends behind the ignition coil. The filter element has a filter and an outer frame portion that surrounds the outer circumference of the filter.
The outer frame portion has a partition plate portion that partitions the internal space between the lower case and the upper case on the other side portion side of the filter in the vehicle width direction.
The upper case has a recessed portion that is recessed downward toward the partition plate portion on the other side portion side of the rear side edge portion in the vehicle width direction.
The vehicle engine according to claim 1 or 2, wherein the air outlet is arranged in the recessed portion.

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