Fuel supply system

Abstract

A fuel supply system of an internal combustion engine is provided. The fuel supply system controls a discharge flow of the fuel supply system during control of non-injection and the minimum injection of a fuel injection apparatus, so as to control a passing flow of a pressure regulating device. The fuel supply system (10) comprises a fuel tank (1) for accommodating fuel; a fuel supply apparatus (2) driven by a brushless motor (6); a filtering device (4) arranged between the fuel tank (1) and the fuel supply apparatus (2); the pressure regulating device (8) arranged in the fuel supply apparatus (2) or adjacent to the fuel supply apparatus (2); the fuel injection apparatus (3) for injecting the fuel pressurized by the fuel supply apparatus (2); and a control unit for controlling on-off time points of the fuel injection apparatus (3) and motor rotational speed of the fuel supply apparatus (2), and controlling the flow passing the pressure regulating device (8) by controlling the discharge flow of the fuel supply apparatus (2).

Description

technical field [0001] The present invention relates to a fuel supply system for controlling the fuel pressure to a target value by using a pressure regulating device of a fuel supply device in, for example, an in-cylinder direct-injection internal combustion engine, etc., and particularly relates to a valve capable of preventing foreign objects from being stuck in the pressure regulating device A malfunctioning fuel supply system caused by parts, etc. Background technique [0002] Generally speaking, in a direct-injection internal combustion engine that directly injects fuel such as gasoline into the cylinder, since extremely high fuel pressure is required, the following fuel supply system is used in many cases: Driven by a mechanical high-pressure fuel pump, and an electronically controlled variable pressure regulating device is set on the high-pressure side, that is, the discharge side, so that a part of the discharged fuel leaks to the low-pressure side, thereby adjustin...

AI Technical Summary

Problems solved by technology

However, in this case, since the lift amount of the valve portion is maximized only periodically for a certain period of time, foreign matter may not be removed.

In addition, although it is possible to maintain the maximum lift of the valve part by duty cycle control, from the viewpoint of product miniaturization, there is a need to reduce the current consumption. In some cases, it is necessary to always energize the pressure regulator, so it is difficult to reduce the current consumption

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