JPH08334032A - Installing device of fuel system part in v-shaped internal combustion engine - Google Patents

Abstract

PURPOSE: To excellently cool a fuel system part, and arrange it compactly by arranging the fuel system part having a space to store fuel between a top wall inclining downward-outward and an engine room inner wall in the vicinity of a front end part of a cylinder bank. CONSTITUTION: In a V-shaped internal combustion engine where the cylinder arranging direction of respective cylinder banks 2 and 3 forming a V shape is arranged in the longitudinal direction of a vehicle, an intake manifold 4 is arranged in a cross-sectional V-shaped space between the respective banks 1 and 2, and fuel pipings 5 and 6 leading to a fuel injection valve are arranged on both left and right sides of an aggregate part of the intake manifold 4. The front end of the fuel piping 5 is connected to an outlet of a fuel damper 9 as a fuel system part through fuel piping, and an inlet of the fuel damper 9 is connected to a fuel pump through fuel piping 61. The fuel damper 9 is arranged between a top wall inclining downward-outward and an engine room inner wall in the vicinity of a front end part of the bank 1, and can be cooled by a cooling wind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting system for a fuel system component provided with a space for retaining fuel in a V-type internal combustion engine, and more particularly to the cooling performance of the fuel system component and the effective utilization of the mounting space. Regarding compatible technology.

[0002]

2. Description of the Related Art In a fuel system of an internal combustion engine, a pressure regulator for returning excess fuel to a fuel tank to maintain a constant fuel supply pressure to a fuel injection valve, and fuel generated by opening and closing a return passage of the pressure regulator. A fuel damper and the like for reducing pulsation and noise accompanying the pulsation are provided (see Japanese Patent Laid-Open No. 2-49964, etc.).

Due to their functions, the pressure regulator and the fuel damper as described above are provided with a space for temporarily retaining the fuel, and the temperature easily rises due to the retention of the fuel, so it is necessary to consider the cooling property. is there.

[0004]

In the in-line type internal combustion engine, it is easy to secure a space for disposing the fuel system parts as described above. However, in a so-called vertical V-type internal combustion engine in which the cylinder arrangement direction of each V-shaped cylinder bank is oriented in the vehicle front-rear direction, conventionally, the fuel system parts are arranged between the cylinder banks. Although many parts such as the intake system are gathered between the cylinder banks, the fuel system parts are arranged above them in order to make the cooling air hit well. It is unavoidable, but as a result, there was a problem that the engine height and vehicle height would increase.

The present invention has been made in view of the above-mentioned conventional problems, and in the V-type internal combustion engine, the fuel system parts that require cooling are satisfactorily cooled and the vehicle height is increased. It is an object of the present invention to provide a mounting device for a fuel system component that can be compactly arranged without any need.

[0006]

Therefore, in the invention according to claim 1, the fuel stays in a V-type internal combustion engine in which the cylinder arrangement direction of each V-shaped cylinder bank is arranged in the front-rear direction of the vehicle. The fuel system component having the space is arranged near the front end of the cylinder bank and between the top wall inclined downward toward the outside and the inner wall of the engine room.

The invention according to claim 2 is characterized in that the fuel system component is attached to a chain case that covers the camshaft drive chain. Further, the invention according to claim 3 is characterized in that the fuel system component is a fuel damper interposed in the middle of the fuel pipe.

Further, the invention according to claim 4 is characterized in that the fuel system component is a pressure regulator interposed in the middle of the fuel pipe. The invention according to claim 5 is characterized in that a protector for protecting the fuel system component is arranged in front of the fuel system component.

The invention according to claim 6 is characterized in that the protector is provided with a ventilation hole. The invention according to claim 7 is characterized in that the fuel system component and the protector are attached to the same component protruding from the engine body.

The invention according to claim 8 is characterized in that the fuel system component is attached to the same component with a rigidity lower than that of the protector.

[0011]

According to the invention of claim 1, since the top wall of each cylinder bank of the V-type internal combustion engine is inclined downward toward the outside, it has a triangular cross section when viewed from the front with the inner wall of the engine room. There is a space that has a shape and extends in the front-rear direction. Cooling air from the front of the vehicle satisfactorily flows through this space. Further, the front end portion of the space has a particularly high cooling property because the cooling air that does not contain the heat emitted from the engine passes through the space.

Therefore, by disposing the fuel system component having the space for accumulating the fuel at the front end portion of the space, good cooling performance can be secured, and the inner wall of the engine room is pushed up to raise the vehicle. There is no increase in height. According to the second aspect of the present invention, the fuel system component is attached to the chain case that covers the camshaft drive chain, so that the attachment portion can be easily processed and can be attached in a stable state.

According to the third aspect of the present invention, the fuel damper is provided with the damper chamber in which the fuel stays in order to alleviate the pulsation of the fuel. Therefore, by mounting the fuel damper in the space, it is preferable. Can be cooled to.
Further, according to the invention of claim 4, since the pressure regulator includes the chamber in which the fuel stays, the pressure regulator can be satisfactorily cooled by mounting the pressure regulator in the space.

According to the fifth aspect of the invention, by disposing the protector, the fuel system component can be protected from the object in front. Further, according to the invention of claim 6, the ventilation holes formed in the protector can maintain good cooling performance and satisfy lightweight.

Further, according to the invention of claim 7, since the fuel system component and the protector are attached to the same component protruding from the engine body, some external force is applied to the attached component. Even if it looks deformed,
Since the relative positional relationship between the fuel system parts and the protector can be kept constant, interference between these parts is avoided.

Further, according to the invention of claim 8, even if the protector is deformed and comes into contact with the fuel system component, the fuel system component is supported by the same component with low rigidity. Bending can absorb the displacement and prevent damage to the fuel system parts.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 showing the configuration of one embodiment, V
The internal combustion engine 10 is arranged such that the cylinder arrangement direction of each of the V-shaped cylinder banks 1 and 2 is oriented in the front-rear direction of the vehicle.
A chain case 3 that covers the chain for driving the intake / exhaust valve camshaft is connected to the front end faces of the cylinder blocks 1 and 2 and the cylinder block connected to the lower ends thereof.

An intake manifold 4 having a downstream end connected to an intake port of each cylinder is arranged in a space having a V-shaped cross section between the cylinder bank 1 and the cylinder bank 2. Fuel pipes 5 and 6 for supplying fuel to a fuel injection valve (not shown) for injecting fuel into each cylinder of each cylinder bank on both left and right sides of the collecting portion of the intake manifold 4.
Are arranged, and the rear ends of these fuel pipes 5 and 6 are connected to each other via a fuel pipe 7.

The front end of the fuel pipe 5 is connected to the outlet of the fuel damper 9 via the fuel pipe 8, and the inlet of the fuel damper 9 is connected to the fuel pump arranged in the fuel tank or the like via the fuel pipe 61. It is connected. The fuel damper 9 is provided to mitigate fuel pulsation generated by opening and closing of a return passage by a pressure regulator, which will be described later, and noise caused by the pulsation, and includes a damper chamber that retains the fuel to absorb the pulsation. ing.

A pressure regulator 11 is connected to the front end of the fuel pipe 6 for returning excess fuel to the fuel tank to keep the fuel supply pressure to the fuel injection valve constant.
The return passage 12 for returning the surplus fuel from the pressure regulator 11 to the fuel tank is provided with the upstream fuel pipe 8,
It is arranged substantially parallel to 61. Here, the fuel damper 9 is attached as follows according to the present invention.

The fuel damper 9 is arranged in the vicinity of the front end of the cylinder bank 1 and between the top wall inclined downward toward the outside and the inner wall of the engine room (bonnet cover). More specifically, the chain case 3 is configured by connecting a front case 3A and a rear case 3B, as shown in an enlarged manner in FIG.
The rear case 3B protrudes upward from the front case 3A from an end edge of the rear case 3B along the top wall of the cylinder bank 1 and projects from the boss 32.
Are formed.

A bracket 21 for mounting a fuel damper is mounted on the front surface of the boss 32 with a resin insulator 31 interposed therebetween.
The front ends of are joined and fastened with bolts 22. The bracket 21 is bent rearward from a front end portion fastened by the bolts 22, and further has a rear end portion bent obliquely outward, and the fuel outlet of the fuel damper 9 is formed at the rear end portion. And a fuel inlet of a fuel pipe 8 which communicates with the fuel outlet.

Further, a protector 41 for covering the front of the fuel damper 9 mounted as described above is provided, and an inner end portion of the protector 41 is formed on a pair of bosses 33, 34 formed by projecting forward from the front end surface of the front case 3A. Fasten with bolts 23 and 24. The protector 41 is bent and formed so that the outer portion thereof is directed rearward and is substantially parallel to the axis of the fuel damper 9, and a plurality of ventilation holes are provided so that the cooling air from the front is efficiently distributed toward the fuel damper 9. The hole 41a is formed.

In this way, the fuel damper 9 is a component that easily rises in temperature because it has the damper chamber in which the fuel stays, but it is provided in the space between the top wall of the cylinder bank and the inner wall of the engine room. As a result, the cooling air from the front of the vehicle satisfactorily flows, and the front end of the space passes the cooling air in front of the engine that does not include the heat released from the engine, so that sufficiently good cooling performance can be obtained. it can.

Further, this space originally exists as a dead space and is large enough to accommodate a fuel damper and other pressure regulators, so that the height of the bonnet cover is restricted. It does not happen and does not affect the vehicle height. Further, in this embodiment, since the protector 41 is provided, an object such as an electrode terminal 51a of the battery 51 disposed in front of the fuel damper 9 is detached from the front of the fuel damper 9 at the time of a vehicle collision or the like. Even if there is a case of flying in the direction, it is possible to avoid hitting the fuel damper 9 by the protector 21, and it is possible to reliably prevent damage to the fuel damper 9.

Further, the fuel damper 9 can obtain a sufficient cooling performance only by the cooling air which goes around the protector 41. However, since the protector 41 is provided with the ventilation hole 41a, it can be directly passed through the ventilation hole 41a. The cooling air can be applied to the protector 41 to ensure higher cooling performance, and at the same time, the weight of the protector 41 can be reduced. In addition, the fuel damper 9
And the protector 41 are both the engine body [cylinder head
(Cylinder bank) and cylinder block] are attached to the same chain case 3 (front case 3A and rear case 3A, which may be integrated), so that the chain case can be used in the event of a collision. Even if 3 is deformed, the relative positional relationship between the protector 41 and the fuel damper 9 does not change, so the protector 41
It is possible to prevent the fuel damper 9 from being damaged due to.

Further, since the fuel damper 9 is supported by the chain case 3 (rear case 3B) with low rigidity through the insulator 31, even if the protector 41 deforms and comes into contact with the fuel damper 9, Insulator
It is possible to prevent the damage of the fuel damper 9 by bending the 31 to absorb the displacement. In the present embodiment, the fuel damper 9 is selected as the fuel system component arranged in the space, but any fuel system component having a space for retaining fuel is required to have a cooling property, and the fuel damper 9 is effective. Alternatively, a pressure regulator may be used. A fuel damper may be provided in the return passage from the pressure regulator, and in that case, the fuel damper may be arranged in the space.

[0028]

As described above, according to the first aspect of the present invention, the fuel system component having the space for retaining the fuel is provided between the top wall of the cylinder bank of the V-type internal combustion engine and the inner wall of the engine room. Since it is arranged between the two and at the front end, good cooling performance can be secured by cooling air that does not include engine heat without affecting the vehicle height.

According to the second aspect of the present invention, the fuel system component can be stably attached to the chain case whose mounting portion can be easily processed. Claim 3
According to the invention of claim 1, it is possible to satisfactorily cool the fuel damper including the damper chamber in which the fuel stays in order to alleviate the pulsation of the fuel.

According to the invention of claim 4, the pressure regulator having the chamber in which the fuel stays can be cooled well. Further, according to the invention of claim 5, by disposing the protector, it is possible to protect the fuel system component from a front object.

Further, according to the invention of claim 6, the ventilation holes formed in the protector can maintain good cooling performance and satisfy the weight requirement. Further, according to the invention of claim 7, since the fuel system component and the protector are attached to the same component, the relative position of the fuel system component and the protector even if the attached component is deformed. The relationship can be kept constant to avoid interference between these parts.

Further, according to the invention of claim 8, even if the protector is deformed and comes into contact with the fuel system component, the support portion for supporting the fuel system component on the same component with low rigidity is bent and displaced. Can be absorbed and damage to fuel system parts can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view of a V-type internal combustion engine equipped with a fuel system component mounting device according to an embodiment of the present invention.

FIG. 2 is a partially sectional front view of the same.

FIG. 3 is a plan view of the same main part.

FIG. 4 is a side view of the same main part.

FIG. 5 is a perspective view of the fuel piping system.

FIG. 6 is a perspective view of the chain case of the same.

[Explanation of symbols]

 1, 2 Cylinder bank 3 Chain case 5-8 Fuel piping 9 Fuel damper 10 V type internal combustion engine 11 Pressure regulator 12 Return passage 21 Bracket 22-24 Bolt 31 Insulator 32 Boss 41 Protector 41a Ventilation hole 51 Battery 51a Electrode terminal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F02M 37/00 321 F02M 37/00 321B 69/00 340 69/00 340T

Claims (8)

[Claims] 1. In a V-type internal combustion engine in which the cylinder arrangement direction of each V-shaped cylinder bank is oriented in the front-rear direction of the vehicle, a fuel system component having a space for retaining fuel is provided at a front end of the cylinder bank. A device for mounting a fuel system component in a V-type internal combustion engine, which is disposed in the vicinity and between a top wall inclined downward toward the outside and an inner wall of an engine room. 2. A fuel system component mounting apparatus for a V-type internal combustion engine according to claim 1, wherein the fuel system component is mounted on a chain case that covers a camshaft drive chain. 3. The mounting device for a fuel system component in a V-type internal combustion engine according to claim 1, wherein the fuel system component is a fuel damper interposed in the middle of a fuel pipe. . 4. The V-type internal combustion engine mounting device according to claim 1 or 2, wherein the fuel system component is a pressure regulator interposed in the middle of a fuel pipe. . 5. A protector for protecting the fuel system component is arranged in front of the fuel system component.
A mounting device for fuel system parts in a V-type internal combustion engine according to claim 4. 6. The mounting device for a fuel system component in a V-type internal combustion engine according to claim 5, wherein the protector has a vent hole. 7. The fuel system component in a V-type internal combustion engine according to claim 5, wherein the fuel system component and the protector are attached to the same component projecting from the engine body. Mounting device. 8. The mounting system for a fuel system component in a V-type internal combustion engine according to claim 7, wherein the fuel system component is mounted on the same component with a rigidity lower than that of the protector.