Auxiliary engine braking control device of high pressure fuel pump of automobile engine

Abstract

The invention discloses the technical field of engines, and particularly relates to an auxiliary engine braking control device of a high pressure fuel pump of an automobile engine. The bottom part ofa low pressure fuel pump is connected with a filter screen; a fuel outlet of the low pressure fuel pump is connected with a fuel inlet of a fuel filter through a fuel return pipe; a fuel outlet of thefuel filter is connected with a fuel inlet of the high pressure fuel pump through the fuel return pipe; the other end of an electromagnetic type flow control valve is connected with a common rail; acontrol unit is in electric input connection with an accelerator pedal and a common rail pressure sensor; and the control unit is in electric output connection with the high pressure fuel pump, a pressure regulating valve and a fuel injector. The auxiliary engine braking control device is simple in structure, small in occupied space and convenient to install, and an original engine structure is not changed; by employing an electromagnetic structure, response is fast; and energy can be reasonably utilized, so that the power of auxiliary engine braking is increased, the abrasion of a service brake is reduced, the service life is prolonged, an integrated braking effect is enhanced, and driving safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a high-pressure fuel pump auxiliary engine braking control device for automobile engines. Background technique [0002] The process of decelerating and stopping a car is called braking. Braking performance is one of the main performances of a car, which is directly related to the safety of people's lives and property. With the rapid development of my country's road transport and logistics industry, the speed and loading capacity of cars are increasing The range has increased, and the mechanical friction wheel brakes can no longer meet the braking requirements of the vehicle. Especially for vehicles driving in mountainous areas, the frequent use of the wheel brakes will cause the wear of the brake friction pads to increase and the temperature of the brakes will be too high (often above 300°C, or even as high as 600-700°C), causing serious failure of the braking function and causing ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-pressure fuel pump auxiliary engine braking control device for automobile engines to solve the problems of service brake wear, reduced service life and poor braking effect in the background technology.

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