Hybrid vehicle type pneumatic braking system and control method thereof

Abstract

The invention provides a hybrid vehicle type pneumatic braking system. The hybrid vehicle type pneumatic braking system comprises: an unloading type air compressor with a clutch, wherein the clutch ismatched with a transmission gear of an engine; an air dryer communicated with the unloading type air compressor with the clutch through an air path; and an air storage tank communicated with the airdryer through an air path, wherein a pressure sensor is arranged on the air storage tank and used for detecting a pressure signal in the air storage tank in real time and transmitting the pressure signal to the hybrid vehicle controller. The hybrid vehicle control unit collects a pressure signal of the pressure sensor and an engine state signal fed back by the engine controller in real time, and the engine controller is used for controlling the running state of the engine and controlling the clutch to be combined with or separated from a transmission gear of the engine to control the unloadingtype air compressor to be started or stopped. The invention further provides a control method of the braking system.

Description

technical field [0001] The invention belongs to the technical field of hybrid vehicles, and in particular relates to a pneumatic brake system of a hybrid vehicle and a control method thereof. Background technique [0002] In order to ensure the safe driving of automobiles, increase the average speed of automobiles, and improve transportation productivity, the importance of the braking system is obvious. Clarifying the principle of the braking system and rationally arranging the valve bodies of the braking system are the basic points of the braking system design. Among them, in the pneumatic brake system, cost and energy conversion rate are the key points to be considered. [0003] In the existing technology, the air compressor products used on hybrid vehicles, considering the particularity of the working conditions of hybrid vehicles and engines, mostly adopt high-pressure electric air compressor series products. When the compressor opens the threshold, the pressure switch...

AI Technical Summary

Problems solved by technology

The pure electric running time of HEV hybrid electric vehicles is about 5% to 10% of the running time of the whole vehicle in a driving condition, and the remaining 90% to 95% of the time the vehicle is running in a hybrid state, so it is easy to make the air compressor in Idle state, wasting energy

[0005] Therefore, there is a lack of a low-cost hybrid vehicle pneumatic brake system and its control method that can improve the efficiency of the air compressor and reduce the idling time of the air compressor.

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