Fuel feed device and fuel pressure regulator

Abstract

A fuel pressure regulator which stores a fuel pressure detecting part formed by a diaphragm part for detecting the pressure of fuel delivered from a fuel pump and a current control part for analogically controlling a current flowing to the fuel pump by a signal from the fuel pressure detecting part and which is provided on the upper surface of a cover part of a fuel feed device to be load in an opening of a fuel tank, wherein the fuel pump is operated so that it delivers fuel according to a flow rate requirement of an injector installed on an engine, and thus the operating current of the fuel pump is reduced and also the operating noise is reduced.

Description

technical field [0001] The present invention relates to a fuel (fuel) supply device that is built in a fuel tank such as an automobile, pressurizes an injector that injects fuel into an engine, and supplies fuel. Background technique [0002] Figure 5 It is a side sectional view of a conventional fuel supply device disclosed in International Publication No. WO96 / 23967. [0003] In the figure, 1 is a fuel (oil) supply device, which consists of a cover 3, a fuel (fuel injection) pump 4, a fuel filter 5, a pressure regulator 6, a fuel injection pipe 7, a fuel level gauge not shown in the figure and an electrical The joint is integrally formed and hangs from the opening 2a of the fuel tank 2 formed of metal or resin. [0004] The fuel filter 5 is formed of a support member 5a made of conductive resin and a filter element 5b accommodated therein, and the cap 3 and the boundary portion 8 are welded in a liquid-tight manner. The support member 5 a supports the fuel pump 4 at its...

AI Technical Summary

Problems solved by technology

[0014] As mentioned above, the fuel pump 4 has nothing to do with the fuel flow rate required by the injector, and its motor is usually in full operation, so its current consumption increases and the burden on the battery mounted on the vehicle increases.

Again, since the motor of the fuel pump 4 is still rotating at a high speed when the engine is idling, etc., and the sound of the engine is small, the problem that exists is that the operating noise of the fuel pump 4 is too large.

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