JP2001003842A - Fuel supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an engine in a compact size by attaching an attaching flange of an intake manifold to a cylinder head side surface of an inclining upper side of the engine, arranging a delivery pipe upward the flange, and arranging a pressure regulator between the delivery pipe and the flange. SOLUTION: An engine mounted in an engine room 6 is arranged by inclining a cylinder axis C1 around a crank axis C2, and an intake manifold 20 disposed continuously to a throttle body 18 of an intake device 16 is connected to a cylinder head 12 side surface of an inclining upper side of the engine 8 by an attaching flange 26. The intake manifold 20 is composed of a nearly square cylindrical surge tank 22 and a plurality of branch pipes 24 connected to the surge tank 22. A delivery pipe 42 is attached to the flange 26 through an attaching part, a pressure regulator 72 is arranged between the delivery pipe 42 and the flange 26 so as to prevent the pressure regulator 72 from protruding upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply device, and more particularly to a fuel supply device capable of reducing the height of an engine, reducing the size of the engine, and improving the mountability of the engine.

[0002]

2. Description of the Related Art Some engines mounted on vehicles such as automobiles are provided with a fuel supply device for supplying fuel by an injector for each cylinder. This fuel supply device is provided with an intake manifold attached to a cylinder head of an engine, a delivery pipe is attached to the intake manifold, an injector is held and provided on the delivery pipe and the intake manifold, and a pressure regulator is provided on the delivery pipe. Mounted and provided.

FIG. 7 shows such a fuel supply apparatus. 7, reference numeral 202 denotes a fuel supply device for an engine mounted on a vehicle (not shown), and reference numeral 204 denotes a delivery pipe. The delivery pipe 204 is attached to an intake manifold (not shown) via an insulator 208 by a manifold attachment bolt 206.

An injector 210 is provided between the delivery pipe 204 and the intake manifold via a cushion 212, and a fuel supply pipe 214 is connected to a supply pipe connection pipe (not shown) at one longitudinal end. The pressure regulator 216 is mounted on the upper side on the other end side in the longitudinal direction by a regulator mounting bolt 218, and the fuel return pipe 220 is connected to the pressure regulator 216.

[0005] The fuel supply device 202 pumps fuel from a fuel tank (not shown) by a fuel pump, and supplies the fuel to a delivery pipe 204 through a fuel supply pipe 214. The pressure regulator 216 adjusts the pressure of the fuel supplied to the delivery pipe 204 and supplies the fuel to the injector 210, and returns excess fuel to the fuel tank via the fuel return pipe 220.

[0006]

In some cases, the engine is mounted on a vehicle such that the cylinder axis is inclined about a crank axis with respect to a vertical line. In the engine mounted in such a manner, the intake manifold is mounted on the side of the cylinder head on the upper side of the slope, the delivery pipe 204 of the fuel supply device 202 is mounted on the intake manifold, and the pressure regulator 216 is mounted on the delivery pipe 204. Provided.

However, the pressure regulator 216
Is mounted on the upper side of the delivery pipe 204 disposed on the inclined upper side of the engine which is mounted on the inclined side, so that there is a problem that the engine is protruded from the maximum height position of the engine.

For this reason, when the height of the engine is increased and an obstacle such as a vehicle body panel exists above the engine, the pressure of the pressure regulator 216 interferes with the fuel supply device 202, and the fuel supply device 202 causes a collision with the vehicle. There is a disadvantage that the mountability is impaired.

[0009]

SUMMARY OF THE INVENTION Therefore, in order to eliminate the above-mentioned disadvantages, the present invention provides an intake manifold for a cylinder head of an engine mounted on a vehicle with a cylinder axis inclined about a crank axis with respect to a vertical line. And a delivery pipe attached to the intake manifold, an injector held and provided between the delivery pipe and the intake manifold, and a pressure regulator attached to the delivery pipe. A mounting flange for the intake manifold is mounted and provided on a side of the cylinder head on the upper side of the engine which is mounted to be tilted at an angle, and the delivery pipe is disposed above the mounting flange, and is mounted on the delivery pipe. The pressure regulator is located between the flange Characterized in that was.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fuel supply device according to the present invention is provided with a mounting flange for an intake manifold mounted on a side of a cylinder head on an inclined upper side of an engine which is mounted on a vehicle at an angle, and is located above the mounting flange. By disposing the delivery pipe and disposing the pressure regulator between the delivery pipe and the mounting flange, it is possible to prevent the pressure regulator from protruding from the maximum height position of the engine. Since the size of the injector is determined to some extent, there is a space beside the injector between the delivery pipe and the mounting flange of the intake manifold. By arranging the pressure regulator in this vacant space, the dead space can be utilized and the height of the engine can be kept low.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention. 1 and 2, 2 is a vehicle, 4 is a vehicle body panel, 6 is an engine room, 8 is an engine, 10 is a cylinder block, 12 is a cylinder head, and 14 is a head cover. The vehicle 2 has an engine 8 mounted in an engine room 6 below the vehicle body panel 4. This engine 8
Is mounted on the engine room 6 with the cylinder axis C1 inclined about the crank axis C2 with respect to the vertical line V.

The engine 8 is provided with an intake device 16. The intake device 16 is provided with an intake manifold 20 connected to the throttle body 18 as shown in FIG. The intake manifold 20 includes a surge tank 22 having a substantially quadrangular cylindrical shape oriented in the direction of the crank axis C2, and a plurality of branch pipes 24 connected to the surge tank 22.

The surge tank 22 has a cylinder head 1
The throttle body 18 is connected and provided on one side in the vehicle width direction that is separated from the throttle body 2. The branch pipe 24 has one end connected to the lower side of the surge tank 22, the middle portion curved and extended in a direction approaching the cylinder head 12, and the other end connected to the mounting flange 26.

The intake manifold 20 has a mounting flange 26 mounted on an intake side surface 28, which is a side surface of the cylinder head 12 on the upper side of the engine 8 mounted on an inclined position, by means of manifold mounting bolts (not shown). An exhaust manifold (not shown) is attached to an exhaust side surface 30 which is a side surface of the cylinder head 12 on the lower side of the tilted engine 8.

The mounting flange 26 is provided with a manifold-side mounting portion 32 for mounting a delivery pipe 42 described later.
A manifold-side holding portion 34 for holding a tip end of an injector 68 described later is provided. Manifold side mounting part 32
Are protruded from the mounting flange 26 in a cylindrical shape, and a mounting seat surface is provided on the upper surface.
6 are provided. The manifold side holding portion 34 is provided in a pedestal shape at a connecting portion of each of the branch pipes 24 of the mounting flange 26, and has a manifold side holding hole 38 facing the intake port (not shown) of the cylinder head 12 on the upper holding seat surface. Provided.

The engine 8 is provided with a fuel supply device 40. The fuel supply device 40 is provided with a delivery pipe 42 that is disposed above the mounting flange 26 of the intake manifold 20 that is disposed on the upper side of the engine 8 that is mounted obliquely.

The delivery pipe 42 is, as shown in FIG.
A pipe-side mounting portion 46 is provided so as to protrude from one side of a cylindrical pipe main body 44 having both ends in the longitudinal direction closed, and a pipe-side holding portion 48 that holds a base end side of an injector 68 described later is protruded downward. Provided. Pipe side mounting part 46
Is provided with a pipe-side mounting hole 50. The pipe-side holding section 48 is provided with a pipe-side holding hole 52.

The delivery pipe 42 is provided with a supply pipe connecting pipe 54 to which a fuel supply pipe (not shown) is connected at one end in the longitudinal direction, and a pressure regulator 72 to be described later is attached at the other end in the longitudinal direction. A regulator mounting portion 56 is provided. The supply connection pipe 54 is provided below the delivery pipe 42, and is connected to a fuel supply pipe via a fuel supply hose 58.

As shown in FIG. 1, the regulator mounting portion 56 is provided at the other end in the longitudinal direction of the delivery pipe 42 and at the cylinder head 12 side so as to be inclined. The regulator mounting portion 56 is provided with a regulator connection hole 60 at the center and two regulator mounting holes 62 on a flat surface provided in a flange shape.

The delivery pipe 42 includes a pipe-side mounting portion 4.
6 is mounted on the intake manifold 20 via the insulator 66 by inserting a pipe mounting bolt 64 into the pipe-side mounting hole 50 and screwing it into the manifold-side mounting hole 36 of the manifold-side mounting portion 32 of the intake manifold 20. As a result, the delivery pipe 42 is located above the mounting flange 26 and is disposed with its longitudinal direction oriented in the direction of the crank axis C2.

The delivery pipe 42 and the intake manifold 20 are provided with an injector 68.
The injector 68 has its distal end held by the manifold side holding hole 38 of the manifold side holding part 34 of the intake manifold 20 via the cushion 70, and has its base end side connected to the pipe side holding hole 52 of the pipe side holding part 48 of the delivery pipe 42. Is held.

A pressure regulator 72 is mounted on the regulator mounting portion 56 of the delivery pipe 42. The pressure regulator 72 has a regulator mounting portion 76 that is mounted on the regulator mounting portion 56 at an angle above the cylindrical regulator body 74. The regulator side mounting portion 76 has a flange shape the same shape as the regulator mounting portion 56,
A regulator-side connection portion 78 is provided so as to protrude at the center, and a regulator-side mounting hole 80 is provided on both sides. The regulator side connection portion 78 is provided with the regulator connection hole 6.
Connected to 0.

The pressure regulator 72 has a return pipe connecting pipe 82 to which a fuel return pipe (not shown) is connected so as to protrude from one side of the regulator body 74 in the axial direction. Negative pressure pipe 1
The negative pressure pipe connection pipe 84 to which the pressure valve 00 is connected is provided so as to protrude. A fuel return pipe is connected to the return pipe connection pipe 82 via a fuel return hose 86.

In the pressure regulator 72, the regulator connection portion 78 is connected to the regulator connection hole 60 provided in the regulator attachment portion 56 of the delivery pipe 42, and is inserted into the regulator side attachment hole 80 of the regulator side attachment portion 76. The regulator mounting bolt 88 is screwed into the regulator mounting hole 62 of the regulator mounting portion 56 to be mounted on the delivery pipe 42.

Thus, the pressure regulator 72
Is disposed between the delivery pipe 42 and the mounting flange 26, is disposed on the other end in the longitudinal direction of the delivery pipe 42, and on the side of the cylinder head 12, and is connected to the surge tank 22 and the branch of the intake manifold 20. The pipe 24 is disposed lower than the maximum height position H1.

This pressure regulator 72 is similar to that shown in FIG.
As shown in FIG.
A pressure adjustment chamber 92 and a negative pressure chamber 94 are defined by 0. The pressure regulation chamber 92 is communicated with the regulator side connection portion 78 and the return pipe connection pipe 82. On the pressure regulating chamber 92 side of the diaphragm 90, a valve body 96 for opening and closing the return pipe connecting pipe 82 is provided.

The negative pressure chamber 94 is provided with the negative pressure pipe connecting pipe 84.
Is communicated to. On the side of the negative pressure chamber 94 of the diaphragm 72, a spring 98 that urges the return pipe connecting pipe 82 in the closing direction is elastically provided. As shown in FIG. 5, one end of the first negative pressure pipe 100 is connected to the negative pressure pipe connecting pipe 84. The first negative pressure pipe 100 communicates with the intake passage 24 a of the branch pipe 24 via the second negative pressure pipe 102.
A regulator negative pressure switching valve 104 is provided between the first negative pressure tube 100 and the second negative pressure tube 102.

The regulator negative pressure switching valve 104 is an OF
At the time of F, the intake negative pressure is introduced into the negative pressure chamber 94 of the pressure regulator 72, and the fuel pressure is adjusted to a constant set value. Further, the negative pressure switching valve 104 for the regulator
At N, the atmospheric pressure is introduced into the negative pressure chamber 94 of the pressure regulator 72, and the fuel pressure is adjusted so as to be higher than the set value. 1 and FIG.
Is a PCV hose connecting the surge tank 22 and the head cover 14.

Next, the operation will be described.

The vehicle 2 mounts the engine 8 in the engine room 6 below the vehicle body panel 4 with the cylinder axis C1 inclined about the crank axis C2 with respect to the vertical line V. This inclined engine 8 has an intake device 16 on the intake side 28 of the cylinder head 12 on the upper side.
The mounting flange 26 of the intake manifold 20 is formed.

A delivery pipe 42 constituting a fuel supply device 40 of the engine 8 is mounted on the mounting flange 26. The delivery pipe 42 is located above the mounting flange 26 and is disposed with its longitudinal direction oriented in the direction of the crank axis C2. The delivery pipe 42 is provided with a supply pipe connection pipe 54 at one longitudinal end and a pressure regulator 72 at the other longitudinal end.

The pressure regulator 72 is disposed between the delivery pipe 42 and the mounting flange 26, and is disposed at the other longitudinal end of the delivery pipe 42 and on the cylinder head 12 side. 2
0 height position H of surge tank 22 and branch pipe 24
It is disposed lower than 1.

As a result, the fuel supply device 40 is configured such that the pressure regulator 72
Can be prevented from protruding. Since the size of the injector 68 is determined to some extent, the delivery pipe 42 and the mounting flange 26 of the intake manifold 12 are fixed.
There is a space beside the injector 68 between them. Since the pressure regulator 72 is provided in the empty space, the dead space can be utilized and the height of the engine 8 can be kept low.

Therefore, the fuel supply device 40 can reduce the height of the engine 8, reduce the size of the engine 8, and improve the mountability of the engine 8 on the vehicle 2.

FIG. 6 shows a second embodiment. The fuel supply device 40 according to the second embodiment is configured so that the injector 68 is inclined toward the branch pipe 24 so that the injector 68 can be held by the delivery pipe 42 and the intake manifold 20.
Are biased toward the branch pipe 24 of the intake manifold 20.

Further, the fuel supply device 40 of the second embodiment
Connects the first negative pressure pipe 100 to the branch pipe 2 of the intake manifold 20.
4 is provided so as to be close to the PCV hose 10.
6 is provided by being curved and positioned below the delivery pipe 42.

In the fuel supply apparatus 40 of the second embodiment, the delivery pipe 42 is biased toward the branch pipe 24 by inclining the injector 68 toward the branch pipe 24.
When the first negative pressure pipe 100 is brought closer to the branch pipe 24 and P
Since the CV hose 106 is located below the delivery pipe 42, the delivery pipe 42 and the negative pressure pipe 10
0 and the PCV hose 106 are disposed lower than the maximum height position H1 of the surge tank 22 and the branch pipe 24 of the intake manifold 20.

Thus, the fuel supply device 4 of the second embodiment
0 indicates not only the pressure regulator 72 but also the delivery pipe 42, the first negative pressure pipe 100, and the PCV hose 10.
6 can be made lower than the maximum height position H1 of the intake manifold 20, so that the maximum height position H2 of the engine can be lowered to the same height as the maximum height position H1 of the intake manifold 20.

Accordingly, the fuel supply device 40 can further reduce the height of the engine 8 and
Can be reduced in size, and the mountability of the engine 8 on the vehicle 2 can be improved.

[0040]

As described above, according to the fuel supply system of the present invention, the mounting flange of the intake manifold is mounted on the side of the cylinder head on the upper side of the engine which is mounted on the vehicle at an angle. By arranging the delivery pipe so as to be positioned and arranging the pressure regulator between the delivery pipe and the mounting flange, it is possible to prevent the pressure regulator from projecting from the maximum height position of the engine. Since the size of the injector is determined to some extent, there is a space beside the injector between the delivery pipe and the mounting flange of the intake manifold. By arranging the pressure regulator in this vacant space, the dead space can be utilized and the height of the engine can be kept low.

Therefore, in this fuel supply device, the height of the engine can be reduced, the size of the engine can be reduced, and the mountability of the engine on the vehicle can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of an engine provided with a fuel supply device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the engine.

FIG. 3 is a perspective view showing an assembled state of an intake manifold and a fuel supply device.

FIG. 4 is a sectional view of a pressure regulator.

FIG. 5 is a negative pressure piping diagram of a pressure regulator and a negative pressure switching valve for a regulator.

FIG. 6 is a partial front view of an engine provided with a fuel supply device according to a second embodiment.

FIG. 7 is a perspective view of a delivery pipe and a pressure regulator showing a conventional example.

[Explanation of symbols]

 2 Vehicle 6 Engine room 8 Engine 12 Cylinder head 16 Intake device 18 Throttle body 20 Intake manifold 22 Surge tank 24 Branch pipe 26 Mounting flange 40 Fuel supply device 42 Delivery pipe 54 Supply pipe connection pipe 56 Regulator mounting part 68 Injector 72 Pressure regulator 76 Regulator mounting part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02B 67/00 F02B 67/00 Q F02M 37/00 321B F02M 35/10 B60K 15/02 C 37/00 321 F02M 35/10 301P

Claims (3)

[Claims] An intake manifold is mounted on a cylinder head of an engine mounted on a vehicle with a cylinder axis inclined about a crank axis with respect to a vertical line, and a delivery pipe is mounted on the intake manifold, and the delivery is provided. In a fuel supply device provided with an injector held in a pipe and the intake manifold and a pressure regulator attached to the delivery pipe, the fuel supply device is provided on a side of a cylinder head on an inclined upper side of the engine, which is inclined and mounted on the vehicle. A mounting flange for the intake manifold is mounted and provided, the delivery pipe is disposed above the mounting flange, and the pressure regulator is disposed between the delivery pipe and the mounting flange. Fuel supply device. 2. The delivery pipe is disposed above the mounting flange with its longitudinal direction oriented in the direction of the crank axis, and a connection pipe to which a fuel supply pipe is connected is provided at one longitudinal end of the delivery pipe. 2. The fuel supply device according to claim 1, wherein the pressure regulator is disposed at the other end in the longitudinal direction of the delivery pipe and on the cylinder head side. 3. The intake manifold is provided with a branch pipe having one end connected to a surge tank and the other end connected to the mounting flange, the branch pipe being lower than the maximum height of the surge tank and the branch pipe. The fuel supply device according to claim 1, wherein the pressure regulator is disposed so as to be located.