A Control Method of Electrohydraulic Braking System Based on Two Degrees of Freedom Differential Gear Train

Abstract

The invention discloses a method for controlling an electric-hydraulic brake system on the basis of a differential gear train with two degrees of freedom. The method includes controlling a brake pedal feel simulating motor: controlling torque of the motor of a brake pedal feel simulating mechanism to provide certain pedal feedback force for a brake pedal so as to simulate brake pedal feel and provide certain input torque for an active pressure generating and regulating mechanism; controlling a brake motor: controlling the torque of the motor of the active pressure generating and regulating mechanism and a rotation angle of a motor shaft, acquiring target thrust of a brake master cylinder according to an input torque-output torque relation of the differential gear train with the two degrees of freedom, and combining the target thrust of the brake master cylinder with regenerative brake force to generate corresponding target brake force for an integral vehicle. The method has the advantages that the electric-hydraulic brake system can be controlled precisely, the control stability is excellent, accurate brake pedal feel can be provided for a driver on the premise that brake intension of the driver can be met, and the method for controlling the electric-hydraulic brake system is novel.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to regenerative braking technology, in particular to a control method of an electronic hydraulic braking system. Background technique [0002] With the intensification of the energy crisis, electric vehicles have become the development direction of a new generation of vehicles, and regenerative braking technology, as a key energy-saving technology for new energy vehicles, has received more and more attention. The regenerative braking technology enables the vehicle to convert a part of its braking energy into electric energy during the braking process, and store it in the energy storage device, so as to realize the energy reuse during braking and deceleration. [0003] The energy recovery method in the current regenerative braking technology of electric vehicles is realized by the reverse drag of the motor. For the motor, it is only necessary to change the on-off of the bridge arm...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a control method for an electro-hydraulic hybrid braking system based on a two-degree-of-freedom differential gear train, so as to overcome the above-mentioned problem that the electro-hydraulic hybrid braking system is difficult to control

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