Composite braking system

Abstract

The invention relates to a composite braking system, which comprises a hydraulic braking system consisting of a brake pedal, a vacuum booster, a braking main cylinder, a hydraulic adjustment module, a braking wheel cylinder, a pressure sensor, a wheel speed sensor and a braking controller and a motor braking system, and is characterized in that: a push rod between the brake pedal and the vacuum booster is provided with a shock absorber; main valves are arranged on oil pipes on which two liquid inlets of the pressure hydraulic adjustment module are positioned respectively; the vacuum input endof the vacuum booster is provided and connected with a vacuum supply module; the vacuum supply module comprises a vacuum pump, a direct current motor, a pressure relay and a power supply; the output end of the vacuum pump is connected with both the vacuum input end of the vacuum booster and the reference pressure input end of the pressure relay through pipes; the output end of the pressure relay is connected with the input end of the direct current motor; the direct current motor is electrically connected with the vacuum pump; and the power supply supplies power to the direct current motor and the pressure relay. The system requires few changes in the hydraulic breaking system of an original vehicle, and can realize series braking energy recovery, guarantee a good brake pedal feel and be widely used in breaking energy recovery systems of electricity-driven vehicles.

Description

technical field [0001] The invention relates to a vehicle braking system, in particular to a composite braking system. Background technique [0002] At present, under the dual pressure of energy and environment, new energy-saving and environment-friendly vehicles including hybrid electric vehicles, pure electric vehicles and fuel cell vehicles have gradually emerged. The above-mentioned energy-saving and environment-friendly vehicles all have a motor and a storage battery or a supercapacitor. When braking, the kinetic energy of the vehicle can be converted into electrical energy by the motor and stored in the storage battery or supercapacitor. Generally speaking, the regenerative braking torque provided by the motor cannot meet the braking requirements of the vehicle. Therefore, energy-saving and environmentally friendly vehicles also retain the original hydraulic braking system or pneumatic braking system, so that the hydraulic braking system will Or the air pressure braki...

AI Technical Summary

Problems solved by technology

In the technical solution of this patent, the two outlets of the brake master cylinder are directly connected to the brake wheel cylinder through the oil inlet valve of the ABS hydraulic valve block, so the braking pressure of the brake wheel cylinder is adjusted during the braking energy recovery process When this happens, it will lead to large fluctuations in the pressure of the brake master cylinder, which will cause severe vibration of the brake pedal and affect the feeling of the pedal.

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