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Fuel feed device

A fuel supply device and technology for fuel supply, which are applied to liquid fuel feeders, charging systems, combustion engines, etc., can solve problems such as frequent changes in fuel pressure and inability to supply fuel stably.

Inactive Publication Date: 2006-11-29
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes a problem that the pressure of the fuel supplied to the fuel injection pump fluctuates frequently, and the fuel cannot be stably supplied from the fuel injection pump.

Method used

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Examples

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Embodiment Construction

[0023] A fuel supply device according to an exemplary embodiment of the present invention will be described below. The fuel supply device of this embodiment is mounted on a motorcycle and is used to supply fuel to the engine of the motorcycle. First, the overall configuration of the fuel supply device will be described. Such as figure 1 As shown, the fuel supply device of this embodiment includes a fuel tank 12 , a fuel injection pump 13 for injecting fuel to an engine 11 , and a sub-tank 1 arranged between the engine 11 and the fuel injection pump 13 .

[0024] The fuel tank 12 is arranged at a height substantially equal to or lower than that of the engine 11 . One end of the fuel supply pipe 16 is installed near the bottom surface of the fuel tank 12 , and the other end of the fuel supply pipe 16 is installed at a fuel suction port of the fuel pump 14 . One end of the fuel supply pipe 17 is attached to the fuel discharge port of the fuel pump 14 , and the other end of the...

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PUM

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Abstract

This invention relates to a fuel supplying apparatus comprising an auxiliary fuel tank (1) and a fuel-injection pump (13) that sucks and ejects fuel. The auxiliary fuel tank (1) is positioned above the fuel-injection pump (13). The first fuel supplying ducts (16, 17) link the fuel tank (12) and the auxiliary fuel tank (1) together. The second fuel supplying ducts (18, 19) link the auxiliary fuel tank (1) and the fuel-injection pump (13) together. On the first fuel supplying ducts(16, 17) installs a fuel pump(14), which transports the fuel stored in the fuel tank(12) to the auxiliary fuel tank(1) through the first fuel supplying ducts. This apparatus also comprises the first reflux duct(20) that links the auxiliary fuel tank and the fuel tank, which returns the excess fuel of the auxiliary fuel tank(1) to the fuel tank(12). It can absorb the pulsation of the fuel pump(14) by connecting the first fuel supplying ducts(16, 17) and the first reflux duct(20) to the auxiliary fuel tank(1).

Description

technical field [0001] The present invention relates to a fuel supply device for supplying fuel to an internal combustion engine such as a motorcycle engine. In particular, it relates to a fuel supply device having a fuel injection pump that sucks in and ejects fuel. Background technique [0002] Japanese Patent Application Laid-Open No. 2004-278527 discloses a fuel supply device including a fuel injection pump. In such a fuel supply device, the fuel injection pump is mounted on the engine (exactly, an intake pipe of the engine), and the fuel tank is arranged at a position higher than the engine. The fuel tank and the fuel injection pump are connected together through a fuel supply flow path. Since the fuel tank is arranged at a position higher than the engine (that is, the fuel injection pump), the fuel supply flow path can be filled with fuel by gravity. The fuel injection pump sucks the fuel in the fuel supply flow path, pressurizes the sucked fuel, and injects the fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/20
CPCY02T10/123Y02T10/12
Inventor 西尾俊雄近藤清二山下长生
Owner AISAN IND CO LTD