Electric mechanical type brake system electric control unit based on CAN bus network communication

Abstract

The invention discloses an electronic control unit of an electromechanical braking system, which bases on CAN bus network communication. The electronic control unit comprises a CAN bus network, a major control node and four minor control nodes, wherein, the major control node receives signals sent by a travel route sensor of a brake pedal and four wheel speed sensors, and then generates a corresponding control signal which is sent to the CAN bus network; the minor control nodes receive own signals from the CAN bus network; the signals received by the minor control nodes go through certain processing and are sent to a braking motor; the braking motor then drives an executive mechanism to brake the wheel. The system of the invention can not only compensate for the defects that traditional hydraulic braking system has too long braking pipelines, excessive valve elements, braking hysteresis happening easily, long braking distance, environment contamination caused by braking liquid, and the like, but also maintain data communication with high efficiency and high reliability in a plurality of electronic control systems of automobiles, which has the function of integrating ABS, TCS, ESP, etc.

Description

technical field [0001] The invention relates to an electromechanical braking system, in particular to an electronic control unit of the electromechanical braking system based on CAN bus network communication. Background technique [0002] At present, almost all automobile braking systems use hydraulic or pneumatic braking, and the liquid or gas pressure is transmitted to the wheels through the brake master cylinder and a series of pipeline components. When the brake pedal is stepped on, the pedal pushes the piston in the brake master cylinder through the push rod, so that the brake fluid generates pressure and is transmitted to the wheel brake through the pipeline. However, ABS (Anti-lock Braking System, anti-lock braking system) or other brake intervention systems adjust the brake pressure according to the needs of each brake. [0003] Traditional hydraulic braking is still a more reliable and economical method. However, for large vehicles, due to the long brake pipeline a...

AI Technical Summary

Problems solved by technology

[0005] In addition, with the increasing application of electronic control units in automobiles, various systems (such as engine electronic control systems, anti-lock braking systems, automatic cruise systems, and vehicle multimedia systems) and automobile display instruments, and between systems and automobile fault diagnosis systems For such a huge amount of data exchange, if the traditional data exchange method is still used, the transmission method of point-to-point connection with wires will be a complicated project. According to statistics, if a mid-level car needs more than 300 wiring harness plugs , the total number of pins is 1800-2200, the total length of the wiring harness exceeds 1.5-2.0km, the assembly is complicated and the failure rate is high

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