JP5168650B2 - Auxiliary structure for internal combustion engine - Google Patents

Auxiliary structure for internal combustion engine Download PDF

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JP5168650B2
JP5168650B2 JP2008230491A JP2008230491A JP5168650B2 JP 5168650 B2 JP5168650 B2 JP 5168650B2 JP 2008230491 A JP2008230491 A JP 2008230491A JP 2008230491 A JP2008230491 A JP 2008230491A JP 5168650 B2 JP5168650 B2 JP 5168650B2
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exhaust manifold
internal combustion
oil filter
combustion engine
portion
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JP2010065552A (en
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明広 藤田
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スズキ株式会社
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Description

The present invention relates to an auxiliary equipment arrangement structure for an internal combustion engine.
In particular, the present invention relates to a lubrication device and an exhaust device that are mounted to face the outer surface of an engine casing, and further to an internal combustion engine accessory that is driven by the internal combustion engine and an internal combustion engine accessory that is related to the arrangement of the mount portion on which the internal combustion engine is mounted. The present invention relates to an arrangement structure.

  Emission regulations for harmful gas components emitted by vehicles are becoming stricter.Therefore, in exhaust systems, it is necessary to enhance the functions of exhaust purification equipment and maximize efficiency. It is provided in the vicinity of the internal combustion engine so as to be closer to the combustion chamber of the internal combustion engine.

On the other hand, in order to improve the stability of the vehicle, it is generally known that the vehicle is mounted so that the position of the center of gravity of a heavy object such as a power unit is lowered.
In the power unit, the mounting position of the internal combustion engine itself is lowered, or the internal combustion engine accessories are mounted at a low position.
However, it is physically difficult to simply spread it on a flat surface, and all things are placed in a low position due to various problems in terms of transmission efficiency, thermal effects, interference prevention, maintainability, cost, etc. It is difficult to install.
For this reason, the higher priority is placed at a lower position, and the others are placed at higher positions.

JP-A-1996-177478 JP 2000-73766 A JP 2005-36718 A JP 2007-120482 A JP 2007-270691 A Japanese Patent No. 3309129 Japanese Utility Model Publication No. 4-95617 Utility Model Registration No. 2528578

By the way, in the conventional auxiliary equipment arrangement structure of an internal combustion engine, for example, a wet sump type internal combustion engine is mounted low, and the catalyst device in the exhaust device described above and the auxiliary device driven by the internal combustion engine are also in a low position. When arranged, the internal combustion engine mount with a low degree of freedom of movement with its position determined naturally, and a catalyst device that requires a large heat generation and a large distance between the surroundings and a pipe that extends long, and If relatively large and heavy internal combustion engine accessories that are limited to positions where the power of the internal combustion engine can be obtained and whose axial direction is naturally determined are arranged at the same height, the planar expansion of the power unit is suppressed. For this, it is necessary to change the lubrication system from a low position.
However, the high oil filter position makes it easy to replace from above, but if it is placed at the top of the internal combustion engine, it will not only detract from the aesthetics, but it will also transport the oil after it has been pumped up until it is filtered. The route becomes longer, and the route until distribution becomes longer.
Further, when the cylinder head is provided with a hydraulically driven variable valve mechanism (VVT), it is necessary to provide an oil control valve (OCV) and a control oil passage separately from the lubrication passage. As a result, the internal combustion engine itself becomes inconvenient and heavy.
As a further hindering configuration, a cooling water passage or a cooling water pump provided on the exhaust side of the wall surface of the cylinder head or cylinder block can be considered.
In order to improve the output of the internal combustion engine, it is necessary to stabilize the combustion by cooling around the cylinder head constituting the combustion chamber.

As a result, it is considered that the position of the oil filter settles in the vicinity of the exhaust manifold (also referred to as “exhaust manifold”) as a position that avoids the above-described accessories.
By positioning the oil filter below the exhaust manifold, it is arranged on the wall surface of the cylinder block that is narrower than the crankcase. it can.
However, maintenance and cooling (overheating avoidance) require further improvements and are possible.

  The present invention provides an auxiliary equipment arrangement that allows an increase in the size of auxiliary equipment mounted at a low position, ensures cooling of the auxiliary equipment (avoids overheating), ensures maintenance of the auxiliary equipment, The purpose is to lower the center of gravity of the internal combustion engine including the machine.

Therefore, in order to eliminate the above-described disadvantages, the present invention is provided with an exhaust manifold connected to each cylinder of a multi-cylinder internal combustion engine, an exhaust manifold covering the exhaust manifold, and provided downstream of the exhaust manifold assembly. A catalyst is disposed in correspondence with an outer wall surface of the internal combustion engine, and an auxiliary machine arrangement structure for the internal combustion engine in which an oil filter is disposed on the outer wall surface of the internal combustion engine. And the center axis of the catalyst is further offset from the center of the collecting portion toward one side in the cylinder row direction, so that the exhaust manifold piping extends from the center of the cylinder row to the cylinder. while the forms so that the circuitous column was provided so as to cover the collecting part Ekimanikaba , In the center side of the cylinder bank, and the exhaust manifold of the pipe is provided with an outer edge having a curved surface portion scooped the portion serving as the detour, its upper or laterally acrid the curved portion of the outer edge the characterized in that a said oil filter inside position surrounding afar.

According to the present invention, the position of the engine wall is relatively high, close to the center of the exhaust manifold, which is the start position of the exhaust pipe, and further, the engine width (the length in the direction perpendicular to the cylinder row direction). ) Can be disposed in a relatively narrow position.
A large area of the sealing surface of the oil filter can be secured.

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

1 to 5 show an embodiment of the present invention.
2 to 5, reference numeral 1 denotes a vehicle, 2 denotes an engine room formed in the front portion of the vehicle 1, and 3 denotes a power unit arranged in the engine room 2.
As shown in FIG. 4, the engine room 2 formed in the front portion of the vehicle 1 is provided with a radiator 5 having a radiator fan (also referred to as “radio fan”) 4 on the front side of the vehicle.
Further, at the bottom of the engine room 2 of the vehicle 1, as shown in FIG. 5, subframes 6 extending in the vehicle width direction are disposed at the vehicle front side portion, and left and right sides extending in the vehicle front-rear direction at both vehicle side portions. First and second side frames 7 and 8 are provided, respectively.
At this time, as shown in FIG. 2 and FIG. 3, a bumper 9 is disposed in the vehicle front side portion of the radiator 5, and the bumper member 10 of the bumper 9 and the mounting height position of the radiator 5 are mounted on the vehicle 1. The power unit 3 can be understood.
An upper cross member 11 that extends in the vehicle width direction is disposed on the radiator 5 as shown in FIG.

As shown in FIGS. 2 to 4, the power unit 3 disposed in the engine room 2 includes an internal combustion engine (also referred to as “multi-cylinder internal combustion engine”) 12 and a transmission 13.
As shown in FIG. 3, the internal combustion engine 12 of the power unit 3 includes a cylinder block 14, a cylinder head 15 mounted on the upper surface of the cylinder block 14, and a cylinder head cover 16 mounted on the upper surface of the cylinder head 15. And a crankcase lower 17 mounted on the lower surface of the cylinder block 14 and an oil pan 18 mounted on the lower surface of the crankcase lower 17.
The internal combustion engine 12 is provided with an intake manifold (also referred to as “intake manifold”) 19 that constitutes a part of the intake system, while an exhaust manifold (also referred to as “exhaust manifold”) that constitutes a part of the exhaust system. 20) is attached.
At this time, when the power unit 3 is disposed in the engine room 2, the exhaust manifold 20 of the internal combustion engine 12 is positioned on the front side of the vehicle, while the intake manifold 19 of the internal combustion engine 12 is positioned on the rear side of the vehicle. As shown in FIG.
As shown in FIG. 5, the exhaust manifold 20 has an exhaust pipe 21 (also referred to as “exhaust pipe” or “exhaust pipe”) that extends below the internal combustion engine 12 and extends from the vehicle front side to the vehicle rear side. It is attached.

As shown in FIG. 5, the internal combustion engine 12 of the power unit 3 is attached to the subframe 6 via the front engine mount 22 on the front side of the vehicle of the power unit 3.
At this time, the front engine mount 22 has a vehicle body side mount bracket 23 and an internal combustion engine side mount bracket 24.
Further, on the vehicle left side of the power unit 3, as shown in FIG. 5, the transmission 13 of the power unit 3 is attached to the left first side frame 7 via a left engine mount 25 which is the transmission side engine mount.
Further, on the vehicle right side of the power unit 3, as shown in FIG. 5, the internal combustion engine 12 of the power unit 3 is attached to the second side frame 8 on the right side via a right engine mount 26 which is the engine mount on the internal combustion engine side.

That is, among the mounts of the internal combustion engine 12, the front engine mount 22 located in front of the horizontally mounted internal combustion engine 12 is arranged with the internal combustion engine side mount bracket 24 on the side of the catalyst case portion 34 to be described later. 12 and a transmission case (also referred to as “transmission 13”).
The front engine mount 22, which is a cylindrical rubber mount that absorbs vibration, is attached to the upper surface of the subframe 6 via the vehicle body side mounting bracket 23 at a position spaced forward from the surface of the catalyst case portion 34.
At this time, even if the front engine mount 22 is relatively close to the internal combustion engine 12, the influence of heat is reduced by the shape of the internal combustion engine side mount bracket 24.

An exhaust manifold 20 connected to each cylinder (not shown) of the internal combustion engine 12 is provided, an exhaust cover 27 that covers the exhaust manifold 20 is provided, and a catalyst 29 that is provided downstream of the collecting portion 28 of the exhaust manifold 20 is provided. On the other hand, the outer surface 12f of the internal combustion engine 12 is disposed so that the surface of the cases are substantially opposed to each other, and the oil filter 30 is disposed on the outer wall 12f of the internal combustion engine 12.
The exhaust manifold 20 has a collecting portion 28 which is offset from the center C of the cylinder row (see FIG. 3) in one of the cylinder row directions, and the cylinder row of the exhaust manifold 27 provided so as to cover the collecting portion 28. A portion sandwiched between outer edge portions 31 on the center C side is formed, and the oil filter 30 is disposed at an inner position surrounded by the outer edge portion 31.
More specifically, as shown in FIGS. 1 to 5, the exhaust manifold cover 27 has a T-shape or a Y-shape when viewed from the front.
This is because the form when the branches 33 of the coated exhaust manifold 20 (or the catalyst-integrated manipulator 32) are gathered in the gathering portion 28 is "4-2-1 gathering", so that the exhaust stroke is achieved. In a structure in which the branches of cylinders that are not continuous are connected together, and these branches are connected together, the branch 33 is made equal in length and distributed.
The exhaust manifold cover 27 covers all the branches 33 and covers the exhaust pipe 21 to the catalyst 29, the maniverter 32, and the catalyst case portion 34 including the start cat (not shown), and the space formed therebetween. This is because it is formed so as to be open and covers the minimum necessary surface area.

Among them, the “2-1 assembly” portion of the exhaust manifold 20 is offset from the central axis L of the catalyst case 34 as shown in FIG. 3, and the offset is away from the oil filter 30. This is a so-called detoured pipe.
Further, since the oil filter 30 is provided, the “2-1 set” portion is offset to the separation side.
As a result, the position of the piping (herein, the catalyst case 34) on the downstream side of the exhaust manifold 20 is largely offset as it moves away from the center of the row of cylinders.
Further, in the “2-1 set” portion immediately upstream of the catalyst 29, the two branches 33 are arranged in the vertical direction (the direction in which they approach or separate) from the outer wall surface 12f of the internal combustion engine 12. A narrow width is provided in the cylinder row direction.
In the exhaust manifold 20 (or the catalyst-integrated manipulator 32), the length of the branch 33 is made equal, the capacity can be secured by the length of the branch 33, and the output can be secured high. 12 and the upstream position close to the combustion chamber of the catalyst 29 leads to improvement and securing of exhaust gas purification performance by its early activation.

The T-shape or Y-shape of the exhaust manifold 27 has a meaning in the handling of the exhaust manifold 20, and an oil filter 30 is arranged in the inner space of the constricted portion (curved curved portion). .
A curved space (air passage) is secured between the inner cylindrical surface of the oil filter 30 and the outer edge (virtual surface passing through the outer edge) of the exhaust manifold 20 provided so as to surround the upper side or the side of the oil filter 30 in a distant manner. can do.

As shown in FIG. 1, the exhaust manifold cover 27 has an upper surface 27 t formed on the upper portion, and this upper surface 27 t is located near the center in the cylinder row direction of the multi-cylinder from the lower inside to the upper outside. A large number of holes (also referred to as “exhaust holes”) 35 serving as vent holes for venting are provided.
Thereby, the stay of hot air is reduced.

As shown in FIGS. 2, 3, and 5, the external wall surface 12 f of the internal combustion engine 12 has an engine driving accessory, for example, A, corresponding to the height of the crankshaft 36 so as to be substantially opposed to the case surface. The / C compressor 37, the catalyst case 34, and the front engine mount 22 are arranged side by side, and the oil filter 30 is arranged above the arrangement and below the exhaust manifold cover 27.
Therefore, the center of gravity of the entire internal combustion engine including the auxiliary machines can be lowered by intensively arranging the auxiliary machines having a large weight mass downward.
Since it is not necessary to secure the sealing surface of the oil filter 30 below the outer wall surface 12f of the internal combustion engine 12, other auxiliary machinery can be enlarged or the space between them can be expanded to avoid the influence of temperature. Can do.

Lowering the internal combustion engine 12 mounting position can be rephrased as, for example, lowering the position of the crankshaft 36, which is its output shaft.
The crankshaft 36 of the internal combustion engine 12 can grasp its vertical position by a split surface (mating surface) of a crankcase (not shown) having a vertically split structure.

When this cut surface (mating surface) is virtually extended, the A / C compressor 37, which is an auxiliary machine, and the catalyst case portion are at the same height as the crankshaft 36, as shown in FIGS. 34, the front engine mount 22 is neatly arranged in the left-right direction of the vehicle.
The oil filters 30 are arranged in an upwardly offset manner, unlike their arrangement.
As a result, problems such as interference in the occupied space are eliminated, leading to actions such as securing the capacity of the auxiliary machine and catalyst, increasing the attachment rigidity of the auxiliary machine, and expanding the gap between them.
Moreover, the arrangement of the A / C compressor 37 and the catalyst case part 34 as auxiliary machines prevents the wind directed around the oil filter 30 from flowing around the internal combustion engine 12.

Further, the height of the lower end of the exhaust manifold cover 27 is exactly the same (the height of the crankshaft 36, the split surface), and as shown in FIG. 1 and FIG. The exhaust pipe 21 exposed below or below the catalyst case 34 is exposed to the catalyst case 34.
Wind (running wind or exhausted wind) from the radiator 5 side, which is the front side of the vehicle, directly hits the surface of the catalyst case 34 or the surface of the auxiliary equipment.
The struck wind flows over the surface while taking heat away from it and cooling it.

As shown in FIGS. 1 to 3 and 5, the oil filter 30 is positioned upward so as to be separated from this (the height of the crankshaft 36, the split surface) and the arrangement.
And the wind (running wind and exhausted wind) from the radiator 5 side, which is the front side of the vehicle, directly hits the surface of the oil filter 30 as well.
The struck wind flows over the surface so as to escape to a place with low inertia and pressure while cooling by taking heat by heat conduction.

As shown in FIG. 1 to FIG. 5, a water pump case 38 is provided at a lateral position on the opposite side of the collection portion 28 of the branch 33 of the exhaust manifold 20 with the oil filter 30 having the same height. .
Although not shown in the figure, the water pump case 38 is provided with a cooling water hose connected to the radiator 5 in the front.

The protruding end face 30s side of the oil filter 30 is surrounded by an exhaust manifold 27 on the upper side or one side (transmission 13 side, front engine mount 22 side) as shown in FIGS. Is surrounded by an auxiliary machine (water pump case 38, A / C compressor 37), and is exposed deeply from the front and disposed deeper than the others.
A part of the exposed exhaust manifold 27 corresponding to the upper part of the oil filter 30 is formed as a concave portion 39 in a substantially planar manner, and the oil filter 30 is utilized using a space 40 formed between the radiator 5 as shown in FIG. The external appearance of the internal combustion engine 12 is improved by making the replacement work easier and less noticeable.

By positioning the oil filter 30 below the exhaust manifold 20 and disposing the oil filter 30 on the wall surface of the cylinder block 14 that is narrower than the crankcase lower 17, the oil filter 30 is pumped up without sacrificing aesthetics. It is possible to shorten the conveyance route until the operation is performed.
Note that the fact that the position of the oil filter 30 is in the vicinity of the collecting portion 28 of the branch 33 of the exhaust manifold 20 is also affected by the presence of a cooling water passage or a cooling water pump on the exhaust side of the wall surface of the cylinder block 14.

2 and 3, the oil filter 30 is provided with an adapter case 41 between the outer wall surface 12f of the internal combustion engine 12, and the adapter case 41 is provided with a vertical wall 42. The vertical wall 42 and the exhaust manifold cover are provided. 27 end edges 43 are provided close to each other.
Accordingly, it is possible to block the ventilation that flows through the exhaust manifold 27 and becomes hot due to heat from the exhaust manifold 20 and the catalyst case 34 so as not to flow to the oil filter 30 side.
Even if the oil filter 30 is disposed at a position where the engine width (the length in the direction orthogonal to the cylinder row direction) is narrow, maintainability can be ensured.

In other words, the cylinder block 14 to which the oil filter 30 is attached is provided with an adapter case 41 therebetween.
The role of the adapter case 41 is mainly to make the arrangement position of the oil filter 30 a desired position that is not inconvenient with respect to the components arranged in the vicinity.
Here, as additional functions, there are guiding oil that may flow when the oil filter 30 is attached / detached, guiding hot air, and cooling air.
In the side view of the internal combustion engine 12 (front view of the vehicle 1), the mounting seat is exactly the second cylinder (from the position of the second branch 33b in the branch 33 of the exhaust manifold 20, as shown in FIGS. 2 and 3). It can be inferred.)

The adapter case 41 is provided with a vertical wall 42 set in a direction along the inner cylindrical surface of the oil filter 30.
The height of the vertical wall 42 is cut obliquely so as to be close to the end edge 43 of the exhaust manifold cover 27, and the vertical wall 42 is curved so as to form a cylindrical shape.
Due to the outer surface of the vertical wall 42, the traveling wind from the front and the exhausted air from the radiator 5 may be along the surface of the internal combustion engine 12 (for example, “engine case”) such as the cylinder block 14. For example, it becomes possible to guide in the vertical direction.
In particular, the shape and height are such that the side facing the catalyst case 34 is shielded so as to guard the oil filter 30 from hot air flowing along the catalyst case 34 from the bottom to the top.
In the exhaust system extending to a lower position, the rising air whose temperature has been raised by the catalyst case portion 34 or the like is guided on the outer surface of the vertical wall 42.
On the other hand, the inner surface side of the vertical wall 42 guides the oil dripping when the oil filter 30 is replaced so as not to go to the exhaust manifold 20 side.

In addition, the distance between the inner surface of the vertical wall 42 and the outer shape of the oil filter 30 is such that the distance directly below the central axis of the oil filter 30 is the largest, and the distance toward the exhaust manifold 20 is small. It is formed so as to be higher.
The vertical wall 42 is substantially U-shaped with three sides closed so as to increase the protruding height so as to correspond to approximately ¼ circumference with respect to the protruding end surface 30 s which is a circular seal surface of the oil filter 30. The walls are provided.

The vertical wall 42 of the adapter case 41 cooperates with the exhaust manifold 27 to guide the traveling wind.
A large number of hot air that enters between the exhaust manifold 20 or the maniverter 32 and the exhaust manifold cover 27 and flows upward while the temperature rises is difficult to escape in the vehicle width direction, and is provided at the upper center of the exhaust cover 27. The structure is such that the hole 35 escapes upward from the internal combustion engine 12.

The exhaust manifold cover 27 has a lower portion extending to an intermediate portion of the catalyst case portion 34 below the oil filter 30, and is provided with a hole 35 that is a vent hole at the upper center above the oil filter 30.
Therefore, the ventilation that flows through the exhaust manifold 27 and becomes hot due to the heat from the exhaust manifold 20 is smoothly discharged upward from the top to prevent the stay, so that it does not flow to the oil filter 30 side. The blocking effect can be improved.

  In other words, when the radiator fan 4 is being driven even when the vehicle is running or stopped, the wind directed from the front toward the periphery of the oil filter 30 passes through while cooling the vicinity of the oil filter 30 and then upwards from the periphery of the oil filter 30. The air enters the lower space of the exhaust manifold 27 while wrapping around the back side of the exhaust manifold 20 and mixes with the hot air rising along the surface of the catalyst case 34, and these hot air is blown through a hole 35 near the upper surface of the exhaust manifold 27. It discharges upward from.

The outer wall surface 12f of the internal combustion engine 12, which is a mounting surface (not shown) of the oil filter 30 and the adapter, has an oil main gallery or a sub gallery communicating with the seal surface of the oil filter 30 therein.
At this time, the oil main gallery and the sub gallery have an engine width near the crankshaft 36 (a length in a substantially horizontal direction perpendicular to the cylinder row direction) and a center that is narrower than the engine width near the cylinder head 15. It is provided using a nearby dead space.

An exhaust manifold cover 27 and an oil filter 30 are disposed at a position facing the front surface of a range surrounded by the outer peripheral locus of the radiator fan 4 provided behind the radiator core 44 of the radiator 5.
The oil filter 30 is provided so as to overlap with the vicinity of the central axis of the radiator fan 4 (or fan motor).
The outer edge of the exhaust cover 27 is provided so as to overlap with the vicinity of the central axis of the radiator fan 4 (or fan motor).

The space opened behind the radiator 5 is a flow path through which exhaust air from a radiator fan (also referred to as “blower fan”) 4 provided integrally with the radiator 5 flows, and at the same time, the radiator 5 is lowered rearward by an external force. It is a space to avoid interference that allows movement when tilting or tilting.
In other words, the radiator 5 can be moved or dropped by a light collision and has a structure that reduces breakage.
A fan shroud (not shown) is integrally provided at the rear of the radiator core 44, and a reservoir tank (not shown) that is also integrally mounted is provided at the upper rear of the radiator core 44.
The radiator 5 includes a first cooling water hose 45 communicating with the internal combustion engine 12 and a second cooling water hose 46 communicating with the water pump case 38, as shown in FIG.

  Oil is pumped and supplied to the oil filter 30 and the crankshaft 36 by an oil pump (not shown) provided inside the oil pan 18 or the timing chain cover 47.

Cooling water cooled by the radiator 5 passes through a water pump case 38 which is located beside the oil filter 30 and is an engine-driven auxiliary machine.
A water jacket (not shown) is provided at the same height inside the internal combustion engine 12 through the water pump case 38 to efficiently cool the cylinder block 14 or the cylinder head 15 of the internal combustion engine 12.

  As shown in FIG. 5, a timing chain cover 47 is disposed on the right side of the vehicle of the internal combustion engine 12, and a generator 48 as an auxiliary device is disposed on the outer side of the timing chain cover 47, while the crankshaft A crank pulley (not shown) attached to 36 is connected to the water pump case 38 and the A / C compressor 37 by an auxiliary machine driving belt 49.

  The adapter portion of the adapter case 41 and the vertical wall portion 42 thereof may be structured so as to be integrated with the cylinder block 14 or the crankcase, respectively or originally.

By using the offset structure of the exhaust manifold 20 (or the maniverter 32) and the exhaust manifold cover 27 described in the embodiment of the present invention, an A / C compressor 37 or the like, which is an engine drive accessory, is provided at a higher position. It is possible to constitute the filter 30 at the lowermost part of the internal combustion engine 12.
However, since the problem that the center of gravity becomes higher than that in the above-described embodiment remains, it is necessary to consider the configuration according to the specifications of the vehicle.

1 is an enlarged perspective view of an exhaust cover portion provided in an internal combustion engine showing an embodiment of the present invention. It is the schematic of the power unit (an internal combustion engine and a transmission) of the vehicle front view of the state which removed the exhaust manifold cover. It is a principal part enlarged view of the power unit (an internal combustion engine and a transmission) of the vehicle front view in the state where the exhaust manifold cover was removed. FIG. 2 is a schematic plan view of a power unit (an internal combustion engine and a transmission) disposed in an engine room at the front of the vehicle. 1 is a schematic perspective view of a power unit (an internal combustion engine and a transmission) viewed from the upper right front of a vehicle.

Explanation of symbols

1 vehicle 3 power unit 4 radiator fan (also referred to as “radio fan”)
5 Radiator 6 Subframe 7, 8 Left and right first and second side frames 9 Bumper 10 Bumper member 12 Internal combustion engine (also referred to as “multi-cylinder internal combustion engine”)
13 Transmission 20 Exhaust manifold (also referred to as “exhaust manifold”)
21 Exhaust pipe (also called “exhaust pipe” or “exhaust pipe”)
27 Exhaust manifold cover 28 Collecting portion 29 Catalyst 30 Oil filter 31 Outer edge portion 34 Catalyst case portion 35 Hole (also referred to as “exhaust hole”)
36 Crankshaft 37 A / C compressor 38 Water pump case 41 Adapter case 48 Generator 49 Auxiliary drive belt

Claims (3)

  1. An exhaust manifold connected to each cylinder of the multi-cylinder internal combustion engine is provided, an exhaust manifold cover for covering the exhaust manifold is provided, and a catalyst provided downstream of the exhaust manifold assembly portion is arranged in correspondence with the outer wall surface of the internal combustion engine. while set in accessory mounting structure for an internal combustion engine provided with an oil filter to the outer wall surface of the internal combustion engine, as well as offset the set portion of the exhaust manifold to one of the cylinder row direction from the center of the cylinder bank, the The center axis of the catalyst is further offset from the center of the collecting portion toward one side in the cylinder row direction, and the exhaust manifold pipe is formed so as to be far from the center of the cylinder row to one side in the cylinder row direction, the exhaust manifold cover provided so as to cover the collecting part, in the center side of the cylinder bank, and the exhaust Ma It provided an outer edge having a curved surface portion which pipe is gouged in the portion that becomes the circuitous Horudo was placed the oil filter to the inside position surrounding the upper or side afar in harsh a curved surface portion of the outer edge An auxiliary machine arrangement structure for an internal combustion engine.
  2. On the outer wall surface of the internal combustion engine, a catalyst case portion having the catalyst at the same height as the crankshaft, an engine drive accessory located on the oil filter side with respect to the catalyst case portion, and the catalyst case portion The engine mount located on the opposite side of the oil filter with respect to the oil filter is arranged side by side, above the catalyst case part, the engine drive accessory and the engine mount, and below the exhaust manifold cover. The oil filter is disposed at a position deeper than the catalyst case and the engine-driven auxiliary machine, and a planar recess is formed in a portion of the exhaust cover that covers the oil filter. when viewed from above, thereby enlarging the space between the radiator and the exhaust manifold cover disposed in front of the exhaust manifold cover by the recess Accessory mounting structure for an internal combustion engine according to claim 1, wherein.
  3. The oil filter includes an adapter case between the outer wall surface of the internal combustion engine, and the adapter case is disposed between the oil filter and the exhaust manifold cover in the vicinity of the outer edge portion of the exhaust manifold cover. A vertical wall extending along the inner surface of the catalyst case portion is provided, and the vertical wall is curved in a direction away from the exhaust manifold cover as it goes downward from a position between the oil filter and the exhaust manifold cover. 2. A curved shape extending right below the oil filter so that a gap between the oil filter and the vertical wall is maximized immediately below the central axis of the oil filter. Or the auxiliary equipment arrangement | positioning structure of the internal combustion engine of Claim 2.
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