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Fuel feeding device and engine

A fuel supply device and fuel supply technology, which are applied in combustion engines, fuel injection devices, internal combustion piston engines, etc., can solve the problems of high cost, large number of parts, complex structure, etc., and achieve the goal of suppressing changes in fuel pressure and reducing costs. Effect

Inactive Publication Date: 2008-05-28
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the pulsation damper of the above-mentioned Patent Document 2 has a large number of parts and has a complicated structure.
Therefore, regardless of the device in any of the patent documents, there is a problem that the cost becomes high due to having to adopt a complicated structure.

Method used

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  • Fuel feeding device and engine
  • Fuel feeding device and engine
  • Fuel feeding device and engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 of the present invention will be described. The fuel supply device of this embodiment is used in a single-cylinder engine of a small motorcycle. First, an outline of a small motorcycle will be described. In addition, FIG. 1 is a side view showing a small motorcycle.

[0050]As shown in FIG. 1 , a small motorcycle 10 has a body frame 12 . A handlebar 14 is connected to an upper end portion of a steering shaft 13 supported on the front portion of the vehicle frame 12 . The lower end portion of the steering shaft 13 is provided with a front wheel 15, and the front wheel 15 can be controlled to turn by operating the handlebar 14. The front portion of the vehicle frame 12 is covered by a wind deflector 16 , and the other part of the vehicle frame 12 is covered by a vehicle body cover 17 . In addition, a seat 18 is provided at the center of the small motorcycle 10 . A fuel tank 20 (described later) is disposed below the seat 18 . The fuel in the fuel tank 20 i...

Embodiment 2

[0072] Example 2 of the present invention will be described. In addition, FIG. 8 is a cross-sectional view showing an intake member. In addition, since the present embodiment is formed by changing a part of the above-mentioned embodiment 1, the modified parts will be described in detail, and the same symbols will be attached to the parts that can be regarded as the same or substantially the same structure as the first embodiment. Reference numerals are used to omit repeated explanations. In addition, repeated descriptions of the following examples will also be omitted.

[0073] As shown in Figure 8, this embodiment is a modification of the air intake member 70 (refer to Figure 6) in the above-mentioned Embodiment 1, and a volume portion (marked Reference numeral 96). The intake member (denoted with reference numeral 98 ) is composed of a hose-side pipe member 100 and an injection valve-side pipe member 102 which are divided into two near the bend of the communication pipe 8...

Embodiment 3

[0076] Embodiment 3 of the present invention will be described. In addition, FIG. 9 is a cross-sectional view showing an intake member.

[0077] As shown in FIG. 9, this embodiment is obtained by changing the volume portion 96 (refer to FIG. 8) of the intake member 98 in the above-mentioned embodiment 2, and the wall surface 96a of the volume portion 96 is formed by a hollow elliptical curved surface. .

[0078] According to the present embodiment, since the wall surface 96a of the volume portion 96 is formed of a curved surface, by reflecting the pressure wave of the fuel on the curved wall surface 96a of the volume portion 96 to change the propagating direction of the pressure wave of the fuel, the force of the pressure wave can be relaxed. . This is effective for suppressing fluctuations in fuel pressure.

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PUM

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Abstract

The invention relates to a fuel supply system, which can restrain fuel pressure change and reduce cost. The fuel supply system supplies fuel in a fuel tank to a jet valve (30) by a fuel pump, and jets the fuel to an engine from the jet valve (30). The volume part (94) for expanding a stream cross-sectional area is amounted in the intake component(70) of a fuel supply pipeline used for supplying the fuel from the fuel pump to the jet valve(30). A plurality of pipeline components (92, 93) are combined by welding or bonding to form the volume part (94).

Description

technical field [0001] The present invention relates to a fuel supply device and an engine. Background technique [0002] For example, the fuel supply device of vehicles such as automobiles and motorcycles is to press the fuel in the fuel tank to the fuel injection valve (also called "injector") by the fuel pump, and then inject the fuel into the engine from the fuel injection valve. (also called "internal combustion engine"), the device has a fuel supply line for supplying fuel from a fuel pump to a fuel injection valve. However, it is known that when the fuel injection valve injects fuel, the fuel pressure in the fuel supply pipe (abbreviated as "fuel pressure") changes, the so-called pulsation, and the fuel pressure in the injection changes (usually drops), the injection After the fuel pressure rises, and in the worst case, reflection waves are generated in the pipe, so the air-fuel ratio (A / F) is deviated, or the parts are degraded due to the impact of the fuel pressure...

Claims

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Application Information

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IPC IPC(8): F02M55/02F02M37/00
CPCY02T10/123Y02T10/12
Inventor 村上广道和田里美浜田干生西尾俊雄中村健英
Owner AISAN IND CO LTD