Coordinated control method for clutch combination of hybrid power system

Abstract

The present invention provides a clutch coupling coordination control method for a hybrid hybrid power system, comprising step 10, before the clutch is coupled, using the engine to control the rotational speed, and the ISG motor to control the torque; and step 20, judging the absolute value of the rotational speed difference between the ISG motor and the drive motor Whether it is less than or equal to n0, if so, switch to using the engine to control the torque, and the ISG motor to control the speed; if not, return to step 10; step 30, judge whether the absolute value of the speed difference between the ISG motor and the driving motor is less than or equal to n1 and the duration is T1 , yes, then give the clutch engagement command; no, return to step 20; step 40, judge whether the absolute value of the speed difference between the ISG motor and the driving motor is less than or equal to n2 and last for T2, if yes, the clutch engagement is completed; no, Then return to step 30. The invention can speed up the speed regulation process before the clutch is combined, reduce the charge and discharge current of the battery during the speed regulation process, and prevent the battery from heating up too fast or even from overheating.

Description

technical field [0001] The invention relates to the field of control of hybrid electric vehicles, in particular to a clutch combination coordination control method of a hybrid hybrid power system. Background technique [0002] The dual-motor single-clutch hybrid hybrid power system using a small-capacity multi-element composite lithium battery has a large charge-discharge rate of the battery during actual use, and it is easy to cause the battery to heat up too fast or even overheat. Please refer to figure 1 As shown, the existing dual-motor single-clutch hybrid power system includes vehicle controller 1, battery management system 2, power battery 3, integrated motor controller 4, drive motor 5, ISG motor 6, clutch 7, torque reducer Vibrator 8, deceleration mechanism 9, engine 10 and engine ECU11; wherein, the vehicle controller 1, power battery 3, drive motor 5 and ISG motor 6 are all connected to the integrated motor controller 4; the battery management The system 2 is re...

AI Technical Summary

Problems solved by technology

Because most of the existing engines 10 use gas engines, but the gas engines have the problem of slow torque response and inaccuracy, and the steady-state error and dynamic error of the speed control of the gas engines are relatively large, if only the speed control of the engine is used for speed regulation , not only the speed regulation time is very long, but also the speed regulation target may not be achieved; if only the speed control of ISG motor 6 is used for speed regulation, the ISG motor 6. The torque of the speed regulation will be very large, plus the torque of the driving motor 5, the discharge current of the battery will be very large, and the purpose of reducing the charge and discharge current of the battery cannot be achieved

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