A braking system for new energy vehicles and its control method

Abstract

The invention provides a braking system for a new energy vehicle and a control method thereof, belonging to the field of vehicle control. The braking system includes: an air storage tank; an air pressure sensor, which is connected to the air storage tank and used to monitor the pressure in the air storage tank; an engine energy supply system and a high pressure energy supply that are respectively powered by an engine, a high-voltage battery system, and a battery. system and low-pressure energy supply system; mechanical air compressor, controlled by the engine; electric air compressor, controlled by the high-pressure energy supply system or low-pressure energy supply system; vehicle controller, with air pressure sensor, switching The valve, the engine power supply system, the high pressure power supply system and the low pressure power supply system are all signal-connected, which are used for according to the status and fault information of the engine power supply system, the high pressure power supply system and the low pressure power supply system and the pressure information in the gas storage tank Control the corresponding energy supply system to inflate the air storage tank. The braking system and the control method thereof of the present invention can improve the safety of the vehicle.

Description

technical field [0001] The invention belongs to the field of vehicle control, and in particular relates to a braking system for new energy vehicles and a control method thereof. Background technique [0002] The vacuum power source of the traditional fuel vehicle vacuum booster comes from the car engine, but the new energy vehicle, especially the pure electric vehicle, has no engine assembly and the braking system lacks a vacuum power source, so the electronic vacuum booster is also used. pregnancy. In order to meet the requirements of energy saving and environmental protection, new energy vehicles require the braking system to reduce the dependence on the vacuum of the engine, or even not to rely on the vacuum of the engine. Moreover, new energy vehicles require the braking system to be able to achieve active conventional braking with low noise. [0003] The requirements of new energy vehicles on the braking system are difficult or even impossible to achieve by traditiona...

AI Technical Summary

Problems solved by technology

[0004] However, for new energy medium and heavy-duty trucks and passenger cars (and some new energy light trucks) that use air brake systems, as well as other new energy models that use air brake systems, since their brake systems use a single Energy supply device, from the perspective of system functional safety, its system failure probability is relatively high, so there is a hidden danger of safety failure

Images