Method and device for controlling automatic gear shifting of automobile

Abstract

The invention provides a method and device for controlling automatic gear shifting of an automobile. The method comprises the steps that the current running mode is determined according to position signals of a shift lever of the automobile, and the running modes comprise the forward gear mode, the parking gear mode, the reverse gear mode and the neutral gear mode; if the running mode is determined to be the forward gear mode, the target gear is determined according to different running working conditions of the automobile; the running working conditions comprise the sliding working condition, the step of determining the target gear according to the different running working conditions of the automobile comprises the substep of determining the target gear to be the neutral gear if active gear-to-neutral-gear conditions are met, and the active gear-to-neutral-gear conditions comprise the conditions that the running working condition of the automobile is the sliding working condition, the accelerated speed of the automobile is smaller than or equal to zero, and the time interval between gear-to-neutral-gear operations is larger than a threshold value; and when the determined target gear is different from the current gear, control over the gear shifting process is executed. According to the scheme, the brake energy recovery efficiency and the dynamic property of running of the whole automobile can be both considered, and the energy utilization efficiency of the whole automobile is improved.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to an automobile automatic shift control method and device. Background technique [0002] With the increasing international attention to energy security and environmental protection issues, countries have become more and more strict on vehicle emissions. Reducing dependence on energy and realizing energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of the world economy. Hybrid vehicles and pure electric vehicles have become the development trend of today's automobile industry. However, the short driving range is the bottleneck restricting the industrialization of pure electric vehicles. Through the reasonable configuration of the control method of the transmission system and the characteristics of the power drive system, improving the energy utilization efficiency of the whole vehicle is a way to increase t...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is that the prior art cannot take into account both the braking energy recovery efficiency and the driving dynamics of the whole vehicle, so that the control method of the transmission system and the characteristics of the power drive system cannot be reasonably matched, resulting in low energy utilization efficiency of the whole vehicle

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