Control method for electronic brake-force distribution of automobile

Abstract

The invention relates to a control method for electronic brake-force distribution of an automobile. The control method includes the first step of setting an EBD subsystem in a general ABS control system, wherein the EBD subsystem comprises an EBD activation trigger and judgment module, an EBD and ABS coordination control module and an EBD control logic module, the second step of determining whether functions of the EBD subsystem need to be activated in the EBD activation trigger and judgment module, the third step of determining the best trigger time of movement of an EBD after the functions are activated, the fourth step of controlling the EBD subsystem to execute corresponding movement according to ABS conditions, detected by the EBD and ABS coordination control module, of front wheels and rear wheels after the movement of the EBD is triggered, and the fifth step of determining whether to enter the EBD control logic module, wherein the EBD control logic module sets the threshold value of critical slip ratio difference values to control the rear wheels to achieve circulating brake control over switching of pressurization, pressure maintenance and pressure reduction through the adoption of a logic threshold value control method based on slip ratio control, and controls brake force over the rear wheels through the adoption of the method combining time constant control and liquid inlet valve opening control. The control method for electronic brake-force distribution of the automobile can be widely applied to the automobile braking process.

Description

technical field [0001] The invention relates to a control method of an automobile braking system, in particular to a control method of automobile electronic braking force distribution. Background technique [0002] Automobile brake safety control, as an important field of vehicle safety research, has always been a hot spot in the research and application of vehicle safety technology. In recent years, the development of automobile ABS system (Anti-lock Braking System, anti-lock braking system) The dynamic safety performance has been qualitatively improved. ABS can automatically control and adjust the wheel braking force during the vehicle braking process to prevent the wheels from locking up and ensure that the vehicle has better braking performance and steering performance. However, there are certain limitations in the current ABS braking control, that is, ABS can only perform braking control when the wheels tend to be locked, and cannot pre-allocate the braking force of the...

AI Technical Summary

Problems solved by technology

[0003] At present, the EBD control method generally adopts the logic threshold value control method based on the slip rate control, and focuses on the vehicle stability control, without considering the full use of the vehicle braking efficiency; at the same time, EBD is a derivative auxiliary system based on the ABS hardware. Functional modules, how to coordinate the control of ABS and EBD to ensure the safety of vehicle braking is still a problem to be studied

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