A switching control method and system for a hybrid electric vehicle

Abstract

The invention discloses a switching control method and system of a hybrid electric vehicle. The switching control method of the hybrid electric vehicle comprises the steps of confirming output shaft rotation speed control processes of an engine system and a power generator system of the hybrid electric vehicle; determining a preset parameter according to the output shaft rotation speed control processes, wherein the preset parameter is an output variable affecting the controlled engine system and the affected power generator system; calculating an output torque according to the output variable; and selecting a torque control method of switching the engine system and the power generator system according to the output torque. According to the switching control method of the hybrid electric vehicle, the calculation process is simpler, the control effect is ideal, and the switching control method of the hybrid electric vehicle can be widely applied to real vehicles; and moreover, by usinga first order active disturbance rejection technology to control an output torque of an output shaft in the hybrid electric vehicle working condition switching process, the rotation speed change of the output shaft is more stable; and the rotation speed overshoot is obviously reduced while the invariable target speed of switching is guaranteed.

Description

technical field [0001] The invention relates to the technical field of control of hybrid electric vehicles, in particular to a switching control method and system for hybrid electric vehicles. Background technique [0002] The existing technology mostly adopts PID control based on classical control theory, which is characterized in that it does not need to know the control model of the controlled object, as long as the controller parameters are adjusted according to experience, the result can be obtained. The actual measurement value of speed and power is fed back to the input terminal, and the deviation compared with the expected value is added to the digital PID controller to adjust the control quantity, and output to the controlled object, and the corresponding actuator generates action to make the control target close to the expected value. However, relying solely on closed-loop feedback control cannot achieve ideal results. However, based on advanced control theory and...

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Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a switching control method and system for a hybrid electric vehicle, which is used to solve the problem that the calculation process in the prior art is relatively complicated and the control effect is not ideal. some difficult problems

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