Ramp running gear-shifting control method based on two-stage planet gear set two-speed transmission

Abstract

The invention discloses a ramp running gear-shifting control method based on a two-stage planet gear set two-speed transmission. The method comprises the steps that 1, when a vehicle runs, the runningspeed, the accelerator opening degree and the whole mass of the vehicle as well as the gradient of the road are obtained, and the reference gear coefficient of the vehicle is determined according tothe running speed, the accelerator opening degree and the whole mass of the vehicle as well as the gradient of the road; 2, the temperature and the humidity of the outdoor environment as well as the road adhesion coefficient are obtained, and the environment coefficient during vehicle running is determined according to the temperature and the humidity of the outdoor environment as well as the roadadhesion coefficient; and 3, the appropriate gear of the vehicle in the current running state is judged according to the vehicle reference gear coefficient and the environment coefficient during vehicle running. According to the ramp running gear-shifting control method based on the two-stage planet gear set two-speed transmission, the appropriate gear suitable for the vehicle can be determined according to the gradient of the road and the driving environment, it is ensured that the vehicle is in the efficient working state, and the vehicle running energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of vehicle gear shift control, in particular to a gear shift control method for driving on slopes based on a dual-stage planetary row two-speed transmission. Background technique [0002] The development of the automobile industry pollutes the human living environment very much, especially in big cities. The exhaust gas emitted by various motor vehicles seriously endangers human health. This hazard is particularly serious in industrially developed countries. The electric drive system does not emit any substances, that is, zero emissions, and is environmentally friendly. Therefore, gradually replacing gasoline vehicles with electric vehicles is the direction of efforts of all countries in the world today. [0003] The automobile transmission is a transmission device used to coordinate the engine speed and the actual driving speed of the wheels, and is used to exert the best performance of the engine. The tr...

AI Technical Summary

Problems solved by technology

[0005] When the vehicle is driving on a slope, the driver needs to change the gear position according to the actual situation to keep the vehicle in an efficient working state. However, in the actual driving process, some drivers cannot accurately judge the timing of shifting due to lack of experience, resulting in low working efficiency of the vehicle. high consumption

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