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High-pressure fuel pump device

A technology of high-pressure fuel pumps and high-pressure pumps, which is applied in the direction of fuel injection devices, pump devices, fuel injection pumps, etc., which can solve the problems of unforeseen and impossible loading of high-pressure fuel pump devices, and achieve cost reduction, reduced number of parts, and space saving Effect

Active Publication Date: 2014-03-19
MIKUNI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, as mentioned above, since the action of sucking the fuel in the fuel tank cannot be expected, it is sometimes impossible to mount a high-pressure fuel pump device on the motorcycle.

Method used

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Examples

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Embodiment Construction

[0038] Below, based on figure 1 The present invention will be described up to the first embodiment shown in FIG. 6 .

[0039] figure 1 It is a schematic side view showing a motorcycle equipped with the high-pressure fuel pump device of the present invention. figure 1 The arrow F in represents the front direction of the motorcycle, and the arrow R represents the rear direction of the motorcycle.

[0040] Explained below figure 1 The motorcycle shown has a main frame member extending in the front-rear direction, such as a main pipe member 1 (only a part is shown). The front wheel 5 is suspended at the front end of the main pipe member 1 via the front fork 3 (built-in telescoping structure), and similarly, the rear wheel 9 is suspended at the rear end via the swing arm member 7 .

[0041] A fuel tank 11 and a seat 12 are attached to the main pipe member 1 in this order from the front side. In addition, sandwiching the main pipe component 1, an acceleration and deceleration s...

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PUM

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Abstract

A high-pressure fuel pump device according to the present invention comprises: a high-pressure pump unit (31) which is a plunger-type unit in which fuel is compressed as a plunger (43) moves back and forth; a diaphragm-type supply pump unit (33) for taking in fuel in a fuel tank (11) along with the movement of a diaphragm (87) which oscillates in response to the back-and-forth movement of the plunger, and for delivering the fuel to the high-pressure pump unit; and a fuel return unit (34) which is provided in the supply pump unit in order to return excess fuel which is not taken in by the high-pressure pump unit to the fuel tank.

Description

technical field [0001] The present invention relates to a high-pressure fuel pump device for supplying fuel in a fuel tank to an injector. Background technique [0002] In motorcycles, the method of injecting fuel using injectors instead of carburetors is becoming popular. This type of fuel injection supplies fuel pressurized by a plunger-type high-pressure fuel pump device to an injector provided in the engine. [0003] Since the plunger-type high-pressure pump fuel device is a pump that discharges fuel by raising the fuel pressure through the movement of the plunger, it cannot expect the action of sucking the fuel in the fuel tank. Therefore, in motorcycles, a plunger-type high-pressure fuel pump device is installed at a position lower than a fuel tank to suck fuel by weight, or is installed inside the fuel tank to directly suck fuel in the fuel tank. [0004] Especially for motorcycles, since fuel tanks, engines, transmissions, and many other devices are densely arrange...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/44F02M37/08F02M59/26
CPCF02B61/02F04B43/067F04B9/042F02M59/102F04B1/00F02M63/005F02M37/046F02M59/46F02M59/464F02M59/462F02M59/00F02M39/005F04B43/021F02M37/0023F04B17/03F04B23/06F04B53/12
Inventor 佐藤友也连哲朗平山俊则加藤裕史
Owner MIKUNI CORP
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