Vehicle power control method and device

Abstract

A vehicle power control method and device are provided. The method comprises the following steps: obtaining the current accelerator pedal opening degree and the current vehicle speed of the vehicle; obtaining the current preset target acceleration of the vehicle according to the current accelerator pedal opening degree and the current vehicle speed; calculating a compensation power when detectingthat an actual acceleration of the vehicle in a forward direction is not equal to a current preset target acceleration of the vehicle; calculating a required power by using the current accelerator pedal opening, the current vehicle speed and the compensation power; calibrating a target speed interval corresponding to the required power according to a characteristic curve of an engine or an electric machine; obtaining a current transmission output shaft speed and an actual speed ratio, and combining the target speed interval, determining a target gear position of the transmission and outputtingthe target gear position; obtaining a rotational speed of an engine or an electric motor of the vehicle, calculating a required torque in combination with the required power, and outputting the required torque. By adopting the scheme, the economy and the power performance of the vehicle can be improved.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a vehicle power control method and device. Background technique [0002] An electronic control system is installed on the whole vehicle. When it is detected that the driver operates the accelerator pedal, the target torque and shift curve (Shift Map) can be obtained respectively through the accelerator pedal output torque curve (Pedal Map) and shift map (Shift Map) stored in the electronic control system. The target gear, provides power to the vehicle, and enables the gear change. [0003] In the prior art, the Pedal Map and Shift Map stored in the electronic control system are all calibrated under the vehicle standard conditions. However, in the actual working process of the vehicle, the driving conditions of the vehicle are relatively complicated. If only the Pedal Map and Shift Map of the vehicle under standard conditions are used to deal with various working conditions, it can...

AI Technical Summary

Problems solved by technology

However, in the actual working process of the vehicle, the driving conditions of the vehicle are relatively complicated. If only the Pedal Map and Shift Map of the vehicle under standard conditions are used to deal with various working conditions, it cannot meet the torque requirements of the vehicle under actual working conditions. and gear requirements, which will cause changes in the driving performance of the vehicle and affect the economy and power of the vehicle

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