Gear shifting method and device based on AMT parallel hybrid vehicle system and vehicle with same

Abstract

The invention is applicable to the technical field of vehicles, and provides a gear shifting method and a gear shifting device based on an AMT parallel hybrid vehicle system and a vehicle with the same. The method comprises the steps that: before gear removal, controlling a motor torque and unloading of an engine throttle by the accelerated speed and the impact degree; controlling the accelerated speed to meet gear removal requirements, and controlling the impact degree to meet stability requirements; when the accelerated speed meets the gear removal requirements and the impact degree meets the stability requirements, controlling a gearbox to perform gear removal; obtaining actual rotating speed of the crank of an engine and target rotating speed of the crank of the engine, and generating the speed difference therebetween; judging whether the difference between the actual rotating speed and the target rotating speed of the crank of the engine is within a preset gear engaging permission range, if yes, outputting a gear engaging position according to the speed difference; controlling the gearbox to shift according to the gear engaging position, after gear engaging, controlling the motor torque and rising rate of the engine throttle by the accelerated speed and the impact degree. According to the gear shifting method and device, the stability of the vehicles is improved.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to a gear shifting method, device and vehicle based on an AMT parallel hybrid electric vehicle system. Background technique [0002] In recent years, domestic and foreign AMT parallel hybrid electric vehicle systems have designed two types of control strategies in order to make the shift interruption time short and the power strong: one is the motor response speed control strategy, and the other is the clutchless shift control strategy. The motor response speed control strategy mainly focuses on shortening the time of each link of shifting, and the main purpose is to reduce the total time of shifting. On the basis of shortening the shift time, the clutchless shift control strategy greatly reduces the frequency of clutch work. This kind of control takes the reliability, power and economic performance of the system as the main purpose. [0003] However, in the existing ...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a shift method based on an AMT parallel hybrid electric vehicle system, aiming at solving the clutchless shift control strategy in the existing AMT parallel hybrid electric vehicle system. During the shift process, The vehicle cannot grasp the timing of gear removal and gear engagement, so that the transition between vehicle gear removal and gear engagement cannot be smooth, resulting in low stability

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