Control-by-wire hydraulic braking system and control method thereof

Abstract

The invention discloses a technical scheme of a control-by-wire hydraulic braking system. An electrical-controlled pressure generating and adjusting unit (B) of the control-by-wire hydraulic braking system is provided with a hydraulic pump (09); an oil outlet pipeline of the hydraulic pump (09) is connected with each brake through an electromagnetic valve; each of two oil cavities of a brake master cylinder (03) is connected with the corresponding brake through the corresponding electromagnetic valve; the oil outlet pipeline of the hydraulic pump (09) is also connected with an oil pot (4) through an electromagnetic pressure adjusting valve (07a); and an electrical-controlled line of each of the electromagnetic valves is connected with an electronic control unit (C). The invention also discloses a control method of the control-by-wire hydraulic braking system. Through the adoption of the technical scheme of the control-by-wire hydraulic braking system disclosed by the invention, a conventional strengthener and a conventional brake master cylinder are not used, and the function of the strengthener, the function of the brake master cylinder and the function of an ESC are integrated in one hydraulic control unit, so that the production cost of the control-by-wire hydraulic braking system is reduced, the size of the control-by-wire hydraulic braking system is low, and the mounting and the arranging of the control-by-wire hydraulic braking system on a vehicle are facilitated.

Description

technical field [0001] The invention belongs to the technical field of automobile braking. More specifically, the present invention relates to hydraulic brake-by-wire systems for automobiles. In addition, the present invention also relates to a control method of the above braking system. Background technique [0002] The traditional hydraulic brake system with wire control such as figure 1 As shown, it is composed of automobile braking system: brake 1, ABS / ESC2, master cylinder 3, vacuum booster 4 (electrical or hybrid electric vehicles add electronic vacuum pump 5), brake pedal 6, bracket and oil pipe . [0003] The working process of this kind of braking system is that the driver steps on the brake pedal when there is a braking demand, and relies on the vacuum booster to boost the boost, and the high-pressure brake fluid flows into the brake to realize the deceleration and braking of the whole vehicle. When ABS / ESC is required When the pressure adjustment function is u...

AI Technical Summary

Problems solved by technology

This system also needs to quickly switch the forward and reverse rotation of the motor within a few milliseconds. The ball screw driven by the motor and the mass inertia of the motor itself are large, and the response requirements and power requirements of the motor are very high. Correspondingly, the power requirements of the electronic control unit vary with It is very high, and the cost of the product produced by this invention is very high when it is applied in industrialization

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