JP2003312272A - Vehicle engine arranging structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle engine arranging structure capable of attaining a retracted layout of an engine by arranging the rear end of an engine in an FR vehicle at a position behind of a general plane of a position at an instrument panel against a driver, capable of improving a steering stability through a reduction in yawing inertia moment caused by the retracted arrangement of the engine, capable of attaining a low bonnet formation through the retracted arrangement of the engine, improving a degree of freedom in a vehicle design and assuring a crushable space at the front part of the vehicle. <P>SOLUTION: This rear wheel driving type vehicle includes a vehicle room 3 and an engine room 2 partitioned at the front part of the vehicle room 3 by an instrument panel 4 so as to drive rear wheels through an engine 1 arranged inside the engine room 2. The engine 1 has an engine rotating shaft 15 arranged at a position above the level of a floor panel 14 of the vehicle room 3 and the rear end part 1R of the engine 1 is arranged at a portion behind of a general plane 4b of a position corresponding to the driver at the instrument panel 4. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a passenger compartment and an engine room defined by a dash panel in front of the passenger compartment, and a rear wheel is driven by an engine arranged in the engine compartment. The present invention relates to a vehicle engine arrangement structure.

[0002]

2. Description of the Related Art Conventionally, as an engine disposition structure of a rear-wheel drive vehicle of the above-mentioned example, there is a structure described in, for example, JP-A-6-2239147. That is, as shown in FIG. 6, a vehicle compartment 61 and an engine room 63 defined by a dash panel 62 in front of the vehicle compartment 61 are provided, and the engine vertically arranged in the engine room 63. This is a general structure of an FR (front engine rear wheel drive) type configured to drive a rear wheel (not shown) by 64.
In the figure, 65 is a front side frame, 66 is an intercooler, 67 is a cooler condenser, and 68 is a radiator.

In this conventional structure, since the engine as a heavy object is arranged in the engine room which is separated from the center of the vehicle to the front, there is a problem that the yaw moment of inertia is relatively large.

Therefore, in order to reduce the above-mentioned yaw moment of inertia and improve steering stability, Japanese Patent Laid-Open No. 2001-2001 has been proposed.
It is conceivable to use a compact structure of an air conditioning unit as disclosed in Japanese Patent No. 105833 or a film damper key type air conditioning unit as disclosed in Japanese Patent Laid-Open No. 10-324141.

By using such an air conditioning unit, the engine having the front engine structure can be retracted to some extent toward the center of the vehicle, and the yaw moment of inertia can be reduced to improve the steering stability to some extent.

In order to further reduce the yaw moment of inertia described above and improve the steering stability, it is necessary to downsize the engine or further rearrange the engine layout. There was a limit, so there was a request to move the engine further back in order to place it in the center of the vehicle.

However, if the engine is simply retracted, there is a problem in that the engine and the dash panel separating the vehicle compartment interfere with the engine.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, in a FR vehicle, the rear end portion of the engine is arranged rearward of the general plane of the position of the dash panel with respect to the occupant, so that the backward layout of the engine becomes possible and Steering stability can be improved by reducing the yaw moment of inertia due to the rearward arrangement, and a lower bonnet can be achieved by the rearward arrangement of the engine, improving the freedom of vehicle design and crushable on the front of the vehicle. An object of the present invention is to provide a vehicle engine disposition structure that can secure a space.

[0009]

A vehicle engine arrangement structure according to the present invention is provided with a vehicle compartment and an engine room defined by a dash panel in front of the vehicle compartment, and the engine compartment is disposed in the engine room. In the rear-wheel drive vehicle in which the rear wheels are driven by the engine, the engine has an engine rotation shaft disposed at a position higher than the height of the floor panel in the vehicle compartment, and the rear end of the engine has the dash panel. It is arranged behind the general surface at a position corresponding to the occupant.

The dash panel having the above configuration may be set as a dash lower panel. According to the above configuration, in the FR vehicle, the rear end of the engine is arranged rearward of the general plane of the position of the dash panel with respect to the occupant. Therefore, the backward layout of the engine is possible, and the rearward arrangement of the engine causes a heavy load. Since the engine is located as close to the center of the vehicle as possible, the yaw moment of inertia can be reduced, and as a result, steering stability can be improved. In addition, the rearward arrangement of the engine can reduce the bonnet, which improves the degree of freedom in vehicle design and ensures a crushable space in the front of the vehicle.

In one embodiment of the present invention, an engine installation space is formed in the center of the dash panel in the vehicle width direction, the engine installation space being recessed toward the vehicle rear side from both sides of the dash panel. The rear end portion is disposed. According to the above configuration, the engine disposition space described above is provided in the center portion of the dash panel in the vehicle width direction, so that the retracted position of the engine becomes more reliable.

In one embodiment of the present invention, an intake pipe and an exhaust pipe are provided on both sides of the engine, and the engine is inclined by a predetermined angle in a direction in which the intake pipe side is upward in a front view. It is arranged.

According to the above construction, the engine is arranged so as to be inclined so that the intake pipe side is upward when viewed from the front. Therefore, a space for disposing the intake pipe can be secured on the intake pipe side of the inclined engine. As a result, the degree of freedom in the layout of the intake pipe is improved.

In one embodiment of the present invention, an intake pipe having an intake manifold is arranged on a side portion of the engine, and the intake pipe is viewed from the outside in the vehicle width direction to the inside in the vehicle width direction in a plan view. It is arranged so as to spread to the engine side of.

According to the above construction, the intake pipe is arranged so as to spread from the outside in the vehicle width direction to the engine side in the vehicle width direction in plan view, so that the intake pipe and the dash panel are arranged during the backward layout of the engine. It is possible to surely avoid the interference.

In one embodiment of the present invention, a plurality of the intake pipes are provided, and only the rearmost intake pipe of the plurality of intake pipes is located rearward on the engine side in plan view and is outward in the vehicle width direction. It is arranged so that the side is located at the front.

According to the above construction, only the rearmost intake pipe of the plurality of intake pipes has the above-mentioned layout.
An intake pipe layout considering intake efficiency can be obtained, and intake resistance can be reduced.

In one embodiment of the present invention, an exhaust pipe having an exhaust manifold is disposed on a side portion of the engine, and the exhaust pipe extends from the outside in the vehicle width direction to the inside in the vehicle width direction in a plan view. It is arranged so as to spread to the engine side.

According to the above structure, the exhaust pipe is arranged so as to spread from the outside in the vehicle width direction to the engine side in the vehicle width direction in plan view. It is possible to surely avoid the interference.

In one embodiment of the present invention, a plurality of the exhaust pipes are provided, and only the rearmost exhaust pipe of the plurality of exhaust pipes is located rearward in the engine side in plan view and is outward in the vehicle width direction. It is arranged so that the side is located at the front.

According to the above construction, only the rearmost exhaust pipe of the plurality of exhaust pipes has the above-mentioned layout,
An exhaust pipe layout considering exhaust efficiency can be obtained, and exhaust resistance can be reduced.

In one embodiment of the present invention, a cowl portion having a closed cross-section structure extending in the vehicle width direction is provided on an upper portion of the dash panel, and the cowl portion has a recess corresponding to an engine installation space of the dash panel. Is provided. According to the above configuration, the recess is formed in the cowl portion on the upper part of the dash panel, so that the engine is more reliably retracted.

In one embodiment of the present invention, the engine is a reciprocating vertical engine. According to the above configuration, the reciprocating engine as the reciprocating period is vertically arranged, and the reversing vertically arranged reciprocating engine can be achieved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows the engine arrangement structure of the vehicle. In FIG. 1, an engine room 2 in which the engine 1 is mounted and a vehicle compartment 3 in which an occupant gets in are partitioned by a dash lower panel 4 as a partitioning means.

The upper part of the engine room 2 provided in front of the vehicle compartment 3 and divided by the dash lower panel 4 is covered with a hood 5 so as to be openable and closable, while the front part of the engine room 2 in front of the engine 1 is opened. Is provided with an intercooler 6, a cooler condenser 7 for air conditioning, and a radiator 8 inclined in a front-rear-low direction, and an air cleaner 9 as an air purifier is disposed between the radiator 8 and the engine 1. .

The engine 1 described above is a cylinder block 1.
0, a cylinder head 11, a cylinder head cover 12, and an oil pan 13, and in this embodiment, a reciprocating engine (more specifically, an in-line 4-cylinder engine) is vertically arranged.

The dash lower panel and the floor panel 14 forming the passenger compartment floor are provided at the rear ends of the passenger compartment 4 and the engine 1 described above. Floor panel 1
It is arranged at a position higher than the height of 4.

A transmission 17 is connected to the rear of the engine 1 so as to be located outside the tunnel portion 16 of the floor panel 14, and the engine 1 and the transmission 17 constitute a power train. Is configured to drive the rear wheels via the transmission 17 and the propeller shaft.

The cowl upper panel 18 and the cowl lower panel 19 are joined to the upper portion of the dash lower panel 4 described above, and the cowl portion 21 has a closed cross section 20 and extends in the vehicle width direction.
A (body rigid member) is provided, and a windshield 22 is attached to the upper portion of the cowl closed cross section 20.

Further, an air conditioning unit 23 is arranged between the dash lower panel 4 and the instrument panel as close to the engine 1 as possible. In FIG. 1, reference numeral 24 is a front wheel.

FIG. 2 is a perspective view of a main portion of FIG. 1, and the dash lower panel 4 has a central portion 4a in the vehicle width direction on both sides of the panel 4, that is, on a rear side of the vehicle from a general surface 4b at a position corresponding to a passenger. An engine installation space 25 is formed in the front part of the central portion 4a by being recessed, and a rear end portion 1R of the engine 1 is installed in the engine installation space 25. Further, the cowl portion 21 provided on the upper portion of the dash lower panel 4 described above.
Also, the recess 21a is formed so as to correspond to the engine installation space 25.
Is provided.

FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a front view of FIG. 2. In both sides of the cylinder head 11 of the engine 1, a plurality of intake pipes 26 ... And a plurality of exhaust pipes 27. As shown in FIG. 4, the engine 1 is arranged so as to be inclined at a predetermined angle in a direction in which the intake pipe 26 side is upward and the exhaust pipe 27 side is downward as shown in FIG.

When the engine 1 having an upright layout which is not inclined as indicated by the phantom line α in FIG. 4 is arranged so as to be inclined toward the engine 1 in the direction in which the intake pipe 26 side is upward as shown by the solid line in FIG. The installation space of 26 is expanded, which improves the degree of freedom in the layout of the intake pipe 26, and on the exhaust side, the distance L is provided between the exhaust port opening end of the cylinder head 11 and the upstream end of the exhaust pipe 27. Since the length is shortened, if the catalyst 28 is provided downstream of the collecting portion of the plurality of exhaust pipes 27, the position where the catalyst 28 is arranged is close to the exhaust port opening end by the distance L, which is effective. 3 and 4, reference numeral 29 denotes a front side frame as a rigid member extending in the front-rear direction of the vehicle.

In FIG. 3 shown in a plan view, the intake pipes 26 located on the left side of the cylinder head 11 have an intake manifold, and these intake pipes 26 are seen from the outside in the vehicle width direction to the inside in the vehicle width direction in plan view. It is arranged so as to spread to the engine 1 side, that is, the cylinder head 11 side.

Moreover, the rearmost intake pipe 26 of the plurality of intake pipes 26 (one intake pipe located on the right side in FIG. 3 and close to the dash lower panel 4) has the engine 1 side when viewed from a plane. It is located rearward and is arranged so that the vehicle width direction outer side is located forward.

Similarly, in FIG. 3, the cylinder head 11
The exhaust pipe 27 located on the right side of the has an exhaust manifold, and these exhaust pipes 27 are arranged so as to spread from the outside in the vehicle width direction to the engine 1 side, that is, the cylinder head 11 side in the vehicle width direction in plan view. It is set up.

Further, the rearmost exhaust pipe 27 of the plurality of exhaust pipes 27 (one exhaust pipe located on the right side in FIG. 3 and close to the dash lower panel 4) has the engine 1 side when viewed from a plane. It is located rearward and is arranged so that the vehicle width direction outer side is located forward.

As described above, in the engine disposition structure of the vehicle of the embodiment shown in FIGS. 1 to 4, the vehicle compartment 3 and the engine room 2 defined by the dash lower panel 4 in front of the vehicle compartment 3 are provided. In the rear-wheel drive vehicle in which the rear wheels are driven by the engine 1 arranged in the engine room 2, the engine 1 is located at a position higher than the height of the floor panel 14 of the vehicle compartment 3 (the crankshaft). Shaft core wire 15) of the engine 1
The rear end portion 1R is disposed behind the general surface 4b at a position corresponding to the occupant of the dash lower panel 4.

According to this structure, the rear end portion 1R of the engine 1 is arranged rearward of the general surface 4b of the dash lower panel 4 with respect to the occupant in the FR vehicle. Therefore, the backward layout of the engine 1 is possible. . That is, with respect to the position of the conventional engine shown by the phantom line β in FIG. 1, the engine 1 is rearranged as shown by the solid line in FIG. 1 to achieve the central midship. Since the engine 1 as a heavy object is positioned as close to the center of the vehicle as possible due to the rearward arrangement of the engine 1 as described above, the yaw moment of inertia can be reduced, and as a result, the steering stability can be improved. Can be planned. Further, the rearward disposition of the engine 1 can reduce the bonnet, which improves the degree of freedom in vehicle design and ensures a crushable space in the front part of the vehicle.

In addition, an engine disposing space 25 is formed in the center portion 4a of the dash lower panel 4 in the vehicle width direction so as to be recessed rearward of the vehicle from both sides thereof. The end portion 1R is arranged. According to this configuration, the engine disposition space 25 is provided in the center portion 4a of the dash lower panel 4 in the vehicle width direction, so that the retracted position of the engine 1 is further ensured.

Further, as shown in FIG. 4, an intake pipe 26 and an exhaust pipe 27 are provided on both sides of the engine 1, respectively, and the engine 1 is oriented so that the intake pipe 26 side is upward in a front view. It is arranged at a predetermined angle.

According to this structure, the engine 1 is inclined so that the intake pipe 26 side is upward when viewed from the front. Therefore, the installation space of the intake pipe 26 is on the inclined intake pipe 26 side of the engine 1. Can be secured, and as a result, the degree of freedom in the layout of the intake pipe 26 is improved.

An intake pipe 26 having an intake manifold is disposed on the side of the engine 1, and the intake pipe 26
Is arranged so as to spread from the outer side in the vehicle width direction to the engine 1 side inward in the vehicle width direction in a plan view.

According to this configuration, the intake pipe 26 is arranged so as to spread from the outside in the vehicle width direction to the engine 1 side inward in the vehicle width direction in plan view. It is possible to reliably avoid the interference between the dash lower panel 4 and the dash lower panel 4.

Further, a plurality of the intake pipes 26 are provided, and only the rearmost intake pipe 26 of the plurality of intake pipes 26 is located rearward with the engine 1 side in plan view, and is located outward in the vehicle width direction. It is arranged so that the side is located at the front.

According to this structure, only the rearmost intake pipe 26 of the plurality of intake pipes 26 has the above-mentioned layout, so that an intake pipe layout considering intake efficiency can be obtained and the intake resistance can be reduced. Can be planned.

Similarly, an exhaust pipe 27 having an exhaust manifold is arranged on the side of the engine 1, and the exhaust pipe 27
Is arranged so as to spread from the outer side in the vehicle width direction to the engine 1 side inward in the vehicle width direction in a plan view.

According to this structure, the exhaust pipe 27 is arranged so as to spread from the outer side in the vehicle width direction to the engine 1 side inward in the vehicle width direction in plan view. It is possible to reliably avoid the interference between the dash lower panel 4 and the dash lower panel 4.

A plurality of exhaust pipes 27 are provided,
Of the plurality of exhaust pipes 27, only the rearmost exhaust pipe 27 is arranged so that the engine 1 side is located rearward and the vehicle width direction outer side is located forward in plan view.

According to this structure, only the rearmost exhaust pipe 27 of the plurality of exhaust pipes 27 has the above-described layout, so that an exhaust pipe layout considering exhaust efficiency can be obtained and exhaust resistance can be reduced. Can be planned.

Further, a cowl portion 21 having a closed cross-section 20 structure extending in the vehicle width direction is provided on an upper portion of the dash lower panel 4, and the cowl portion 21 has a cowl portion 21.
The concave portion 21a corresponding to the engine installation space 25 is provided. According to this configuration, since the recess 21a is formed in the cowl portion 21 above the dash lower panel 4, the retracted arrangement of the engine 1 becomes even more reliable.

In addition, the engine 1 is a vertical reciprocating engine. According to this configuration,
Place the reciprocating engine vertically as a reciprocating period,
This reciprocating engine can be installed vertically.
FIG. 5 shows another embodiment of the engine disposition structure of the vehicle. The cowl upper panel 18, the cowl lower panel 19, and the dash upper panel 30 constitute a cowl portion 21 as a main body rigid member extending in the vehicle width direction. Along with the lower part of the dash lower panel 4, the dash cross member 3
1 is joined to improve the rigidity of the panel 4.

Also in this embodiment, the central portion 4a in the vehicle width direction of the dash lower panel 4 is recessed to form the engine installation space 25, and the cowl portion 21 is formed so as to correspond to the engine installation space 25. Is provided with a recess.

Even with this structure, the other structures, functions, and effects are almost the same as those of the previous embodiment.
In FIG. 5, the same parts as those in the previous figure are designated by the same reference numerals,
The detailed description is omitted.

In the correspondence between the structure of the present invention and the above-described embodiment, the engine rotating shaft of the present invention corresponds to the axial center line 15 of the crankshaft of the embodiment, and hereinafter, similarly, the dash panel is the dash lower panel 4. However, the present invention is not limited to the configuration of the above-described embodiment.

[0056]

According to the present invention, in the FR vehicle, the rear end portion of the engine is arranged rearward of the general plane of the position of the dash panel with respect to the occupant. By reducing the yaw moment of inertia, it is possible to improve steering stability, reduce the bonnet when the engine is retracted, improve the freedom of vehicle design, and secure a crushable space in the front of the vehicle. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a side view showing an engine disposition structure of a vehicle according to the present invention.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view of FIG.

FIG. 5 is a side view showing another embodiment of the vehicle engine disposition structure.

FIG. 6 is a plan view showing a conventional vehicle engine arrangement structure.

[Explanation of symbols]

1 ... engine 1R ... rear end 2 ... engine room 3 ... Vehicle compartment 4 ... Dash lower panel (dash panel) 4a ... central part 4b ... General section 14 ... Floor panel 15-axis core wire (engine rotation axis) 21 ... Cowl part 21a ... Recess 25 ... Engine installation space 26 ... Intake pipe 27 ... Exhaust pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Osamu Kishi             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation (72) Inventor Yukio Nakamura             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation F-term (reference) 3D003 AA05 AA18 BB02 CA05 DA03                 3D035 CA19 CA25

Claims (9)

[Claims] 1. A rear-wheel drive vehicle in which a vehicle compartment and an engine room defined by a dash panel are provided in front of the vehicle compartment, and the rear wheels are driven by an engine arranged in the engine room, In the engine, the engine rotation shaft is arranged at a position higher than the height of the floor panel in the passenger compartment, and the rear end of the engine is arranged rearward of a general surface of the dash panel at a position corresponding to an occupant. The vehicle engine structure. 2. An engine installation space is formed in a center portion of the dash panel in the vehicle width direction, the engine installation space being recessed rearward of the vehicle from both sides thereof, and the rear end of the engine is installed in the engine installation space. The engine disposition structure for a vehicle according to claim 1, 3. An intake pipe and an exhaust pipe are arranged on both sides of the engine, respectively, and the engine is arranged so as to be inclined at a predetermined angle in a direction in which the intake pipe side is upward in a front view. Alternatively, the engine disposition structure of the vehicle according to 2 is provided. 4. An intake pipe having an intake manifold is disposed on a side portion of the engine so that the intake pipe extends from the outside in the vehicle width direction to the engine side in the vehicle width direction in plan view. The engine disposition structure for a vehicle according to claim 1, wherein the engine disposition structure is provided. 5. A plurality of the intake pipes are provided, and only the rearmost intake pipe of the plurality of intake pipes is positioned rearward on the engine side and frontward on the outer side in the vehicle width direction in a plan view. The engine arrangement structure for a vehicle according to claim 4, wherein the engine arrangement structure is provided. 6. An exhaust pipe having an exhaust manifold is disposed on a side portion of the engine, and the exhaust pipe is arranged so as to spread from an outer side in a vehicle width direction to an engine side in a vehicle width direction in a plan view. The vehicle engine disposition structure according to claim 1, 2, 3 or 4, which is provided. 7. A plurality of the exhaust pipes are provided, and only the rearmost exhaust pipe of the plurality of exhaust pipes is positioned rearward on the engine side and frontward on the outer side in the vehicle width direction in a plan view. The engine arrangement structure according to claim 6, wherein the engine arrangement structure is provided. 8. A cowl portion having a closed cross-section structure extending in the vehicle width direction is provided on an upper portion of the dash panel, and a recess corresponding to an engine installation space of the dash panel is provided on the cowl portion. The engine arrangement structure described. 9. The engine of claim 1, 2, 3, 4, 5, 6, 7 or 8 wherein the engine is a reciprocating vertical engine.
The engine arrangement structure of the vehicle described.