A full hydraulic abs braking system and braking method based on hybrid power

Abstract

The invention provides a full-hydraulic ABS braking system based on hybrid power and a control method for braking energy recycling. The system comprises energy storage devices, a liquid charging valve, an electronic pedal, proportioning valves and a braking controller. The energy storage devices are connected with the liquid charging valve through pipelines. Pressure sensors are arranged on the pipelines. The proportioning valves are connected with the pipeline between the energy storage devices and the liquid charging valve. The electronic pedal is connected with the braking controller which is connected with the proportioning valves and wheel edge brakes. The objectives of the invention are to achieve the ABS function and braking energy recycling while adopting a novel hydraulic driving braking system. A traditional hydraulic booster is replaced, so a double-loop function is achieved, space occupation of the system is reduced and response time of the braking system of the whole vehicle is extended.

Description

technical field [0001] The invention belongs to a wheeled vehicle service braking system, which is suitable for large-tonnage hybrid wheeled vehicles. Background technique [0002] At present, the braking systems of many hybrid wheeled vehicles in China are mostly driven by hydraulic servo assist to realize the function of hydraulic ABS. Such as figure 1 As shown, this form of hydraulic device——brake master cylinder 1A mainly adopts vacuum booster or hydraulic booster, and the braking process is to step on the brake pedal 2A, and the booster 1A with the master cylinder generates higher brake pressure. The ABS pressure regulating device 3A enters the brake 9A of each wheel to perform braking. The ABS function is comprehensively calculated by the brake controller 4A based on the wheel speed signal 10A, the pressure signal 8A and the feedback signal of the motor 5A to obtain the requirements of each wheel. Adjust pressure in real time. When mixed braking is required, the bra...

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Problems solved by technology

[0003] However, the problem with the hydraulic servo power-assisted braking system is that the pressure of the booster is generally up to about 10 MPa, which cannot achieve the braking pressure required by the hydraulic brakes of large-tonnage vehicles, so it can only be applied to small-tonnage passenger vehicles. Heavy-duty vehicles generally use pneumatic brakes, and the response time of pneumatic brakes is 0.2s to 0.4s slower than hydraulic brakes; ABS pressure adjustment devices are generally integrated designs, arranged near the brake master cylinder, and away from the wheels. The brakes are far away, so the response time of the brakes will be affected by the length of the line

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