Control method for shifting speed regulation and controller thereof, and parallel hybrid vehicle

Abstract

The invention specifically relates to a control method for shifting speed and its controller and a parallel hybrid vehicle. The control method comprises the steps of: calculating a target input speed of the gearbox according to the current output speed and target gear position of the gearbox; Calculate the initial speed regulation torque according to the speed and the current speed of the drive motor of the gearbox; calculate the angular acceleration of the drive motor according to the current speed, and generate the torque compensation coefficient according to the angular acceleration; control the actual speed of the shifting process according to the initial speed control torque and the torque compensation coefficient Speed ​​torque. According to the control method for shifting and speed regulation provided by the present invention, the actual speed regulating torque is controlled by combining the initial speed regulating torque with the torque compensation coefficient, and the torque compensation coefficient is related to the angular acceleration of the drive motor. Therefore, in the process of shifting It can predict the response trend of the drive motor to a certain extent, so as to reduce the phenomenon of speed regulation overshoot of the drive motor.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a control method for shifting and speed regulation, a controller thereof, and a parallel hybrid vehicle. Background technique [0002] This section provides merely background information related to the present disclosure and is not necessarily prior art. [0003] For the gearboxes of new energy vehicles and hybrid vehicles, the speed difference between the front and rear of the gearbox must be quickly adjusted to within the required speed difference before shifting. There is a certain time difference between when the MCU (motor controller) sends the command and the MCU responds to the received command and gives feedback, which causes the actual shifting torque to always lag behind the required shifting torque, especially before and after the gearbox. After the speed adjustment speed difference has been completed and the required torque has become 0, the motor will still take a ...

AI Technical Summary

Problems solved by technology

[0003] For the gearboxes of new energy vehicles and hybrid vehicles, when shifting gears, the speed difference between the front and rear of the gearbox must be quickly adjusted to within the required speed difference before the gear can be shifted. However, from the HCU (vehicle controller) to the MCU (Motor controller) sends the command, and there is a certain time difference between the MCU responding to the received command and giving feedback, which causes the actual shift torque to always lag behind the required shift torque, especially the front and rear of the gearbox. After the speed difference has been adjusted and the required torque has become 0, the motor will still spend a certain amount of time to clear the torque, which will lead to further changes in the speed difference that has been adjusted. If the gear is engaged at this time, If the speed difference between the front and rear of the gearbox is too large or the torque is too large, there will be problems such as gear failure, gear hitting, abnormal noise, etc.

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