Pure electric bus drive control method

Abstract

A pure electric bus drive control method comprises the following steps that after a vehicle controller passes self inspection, a working pattern of the a vehicle is judged to be one of a safety starting pattern, an economic pattern and a power pattern according to the opening degree of an accelerator pedal, the change rate of the opening degree of the accelerator pedal and the SOC state of a battery and by combining a minimum working time limiting module; if the working pattern of the vehicle is recognized as the safety starting pattern, expected motor torque under the safety starting pattern is calculated; if the working pattern of the vehicle is recognized as the economic pattern, the expected motor torque under the economic pattern is calculated; otherwise the expected motor torque under the power pattern is calculated; finally, the expected motor torque is restrained and limited through energy limiting strategies, final target torque instructions are output to a drive motor if the vehicle has no serious faults at the moment, the vehicle is switched to high pressure if a fault level is high, and otherwise the final demand torque of the drive motor is output as zero.

Description

technical field [0001] The present invention relates to a control method of a passenger car, more precisely, the patent of the present invention relates to a driving control method of a pure electric passenger car. Background technique [0002] A pure electric vehicle is a nonlinear dynamic system integrating electronics, electricity, chemistry, and machinery. Its power system is mainly composed of a power battery pack, a power battery management system, a drive motor, a motor controller, and a transmission. Vehicle control technology, power battery and power battery management technology, motor and motor control technology are considered to be the three key technologies of pure electric vehicles. The vehicle controller is the vehicle powertrain controller, which is the core component of the pure electric vehicle vehicle control system. As the software part of the vehicle controller, the vehicle drive control strategy is mainly responsible for the output control of the vehi...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the start control of idling crawling without considering the change of gear position in the prior art and the large overlap range of torque control under different drive modes with torque compensation, which loses the meaning of division, and the mode automatic Switch identification parameters to get more difficult problems, so as to provide a pure electric bus driving control method, the driving control method includes safe start control strategy, economic mode control strategy, power mode control strategy, energy limit control strategy

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