Power generation control method for engine and driving motor of hybrid power bus

Abstract

The invention discloses a power generation control method for an engine and a driving motor of a hybrid power bus. The power generation control method for the engine and the driving motor of the hybrid power bus comprises the following steps that the current speed and required traction torque of the bus are obtained; the required traction torque is determined to be within the range of the economical torque of the engine, and the difference value between the required traction torque and the economical torque of the engine is set to be the target value of the brake torque of the driving motor; the target value of the brake torque of the driving motor is adjusted, so that the absolute value of the brake toque of the motor is made to be larger than the minimum power generation torque of the motor and smaller than the maximum power generation torque of the motor; in the constrained time, the brake torque of the driving motor is changed to the numerical value of the brake torque of the motor from zero according to the quantization step, and the absolute value of the brake torque of the driving motor is set not to exceed the maximum torque which is allowed to be output at the current rotating speed of the driving motor; and the sum of the economical torque of the engine and the brake torque of the driving motor is used as the target torque of the engine.

Description

technical field [0001] The invention relates to the technical field of hybrid electric buses, in particular to a power generation control method for an engine and a driving motor of a parallel hybrid electric passenger car. Background technique [0002] According to the different drive structure types of hybrid electric vehicles, the common structure of the drive chain of the hybrid power system is divided into two types: "engine-clutch-drive motor" or "engine-ISG motor-clutch-drive motor". When the vehicle speed is low, the clutch is disengaged, and the vehicle is directly driven by the driving motor; when the vehicle speed is high, the clutch is engaged, and the engine and the motor work together to jointly drive the vehicle. [0003] Compared with traditional vehicles, hybrid electric buses add electric motors as drive units, which can realize pure electric starting. The motor provides energy to reduce the driving time of the engine and reduce the fuel consumption of the...

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to solve the technical defect that the electric power recovered by the braking of the existing parallel hybrid electric passenger car is limited, so that the recovered electric power cannot meet the electric power required for pure electric driving

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