Power Interrupt Compensation Control Method During AMT Shifting Process of Hybrid Electric Vehicle

Abstract

The invention discloses a power interruption compensation control method for a hybrid electric vehicle AMT shifting process. The power interruption compensation control method comprises the followingsteps that S1, the engine output torque at any moment t is T<ecu_act>(t), the motor output torque is T<mot_act>(t), the vehicle torque is T<req_car>(t), and T<req_car>(t) = T<ecu_act>(t) + T<mot_act>(t); during t1-t2, a clutch is opened from closed, T<ecu_act>(t) is reduced, T<ecu_act>(t1) = a, T<mot_act>(t1) = b, T<req_car>(t1) = c, T<ecu_act>(t2) = 0, T<mot_act>(t2) = T<req_car>(t2), and a, b and c are engine required torque, motor required torque and vehicle required torque separately when throttle / brake signals remain unchanged; S2, during t2-t3, the clutch remains open and a gear is shifted, and T<mot_act>(t) = T<req_car>(t); and S3, during t3-t4, the clutch is closed from open, T<ecu_act>(t) is increased, T<ecu_act>(t4) = a, T<mot_act>(t4) = b, and T<req_car>(t4) = c. According to the power interruption compensation control method for the hybrid electric vehicle AMT shifting process, the interruption time of power in the vehicle shifting process is eliminated or shortened, and riding comfort of passengers is improved.

Description

technical field [0001] The invention belongs to the technical field of electric and hybrid vehicles, in particular to a power interruption compensation control method for a hybrid vehicle AMT gear shifting process. Background technique [0002] Hybrid vehicles are driven by engines and / or motors, and are distinguished by different numerical codes according to the different positions of the drive motors in the hybrid power transmission system, which are respectively P0, P1, P2, P3, and P4 configuration hybrid power systems , the motors of each configuration are P0 motor, P1 motor, P2 motor, P3 motor and P4 motor. The P2 motor is placed before the gearbox input shaft, after the clutch connected to the engine, and the P3 motor is placed after the gearbox output shaft. The mode in which the P2 motor and the engine jointly drive the vehicle is the P2 hybrid mode, and the mode in which the P3 motor and the engine jointly drive the vehicle is the P3 hybrid mode. [0003] Both the...

AI Technical Summary

Problems solved by technology

During the above shift process, the car loses power during the clutch opening process. In other words, the power interruption time is from the clutch opening to the clutch closing to the creep point. The AMT shift interruption time is relatively long, which has a greater impact on driving and ride comfort. Big

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