A vehicle starting protection device for automatic transmission and its control method

Abstract

The invention provides a vehicle starting protecting device of an automatic gear box. The vehicle starting protecting device of the automatic gear box comprises a gearbox control module used for automatic gear shifting, the input end of the gearbox control module is connected with the output end of a vehicle speed detection device, the control output end of the gearbox control module is connected with the input end of a door state switch, the output end of the door state switch is connected with a handbrake electromagnetic valve, and the handbrake electromagnetic valve is arranged on a gas circuit between a handbrake and a brake chamber. The invention further provides a vehicle starting protecting control method. Firstly, vehicle speed condition judgment and vehicle door state condition judgment are carried out, handbrake braking operation and automatic return-to-neutral-gear operation are carried out after requirements are met, and therefore safety accidents due to the situation that a vehicle is directly started while vehicle doors are not closed or not firmly closed, and safe starting of the vehicle is achieved; meanwhile, it can be guaranteed that the vehicle does not slide when started on a slope, the vehicle is not switched into the neutral gear when the vehicle doors are opened and the vehicle runs at high speed, and oil consumption can be reduced because of automatic return-to-neutral-gear design.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a vehicle starting protection device for an automatic transmission and a control system thereof. Background technique [0002] With the development of society and the continuous progress of the bus industry, the requirements for the safety performance of passenger cars are getting higher and higher. In a traditional bus, when the passenger door is not closed, when the driver mistakenly steps on the accelerator, the vehicle will start to move, which will cause accidental injury to the passengers. The occurrence of such safety accidents also puts forward higher requirements for the design of the bus. Contents of the invention [0003] The invention provides a vehicle starting protection device and a control method thereof, which can automatically brake with a hand brake and automatically return to neutral within a safe braking speed when the vehicle door is opened. [0004] In order t...

AI Technical Summary

Problems solved by technology

When the passenger door of a traditional bus is not closed, when the driver mistakenly steps on the accelerator, the vehicle will start to move, which will cause accidental injury to passengers. The occurrence of such safety accidents also puts forward higher requirements for the design of the bus.

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