Engine torque control method and device

Abstract

Embodiments of the invention provide an engine torque control method and device. The engine torque control method comprises the steps that a current driving condition type of a vehicle is first obtained through analysis according to operating parameters of the vehicle, and then a corresponding relationship between the various preset driving condition types and torque control strategies is used forgetting the torque control strategy corresponding to the current driving condition type, the required torque of an engine is calculated, and then the torque of the engine is adjusted. The adaptability of the vehicle under complex and changing driving conditions is improved, the fuel saving effect of the vehicle is improved. further, when the vehicle operating state meets the preset conditions andenters the throttle fixing mode, the required torque of the engine can be kept at a fixed value to ensure that the engine torque remains stable, and the fuel saving effect of the vehicle can be further improved; and through the cooperation of an overtaking mode and a torque limiting mode, the economy and power of the vehicle are comprehensively guaranteed.

Description

technical field [0001] The present invention relates to the technical field of vehicle control, more specifically, to a method and device for controlling engine torque. Background technique [0002] Existing vehicles can realize the coordination and control of the vehicle power system through the VCU (Vehicle Control Unit, vehicle controller), reducing fuel consumption and emissions. The fuel-saving control of existing vehicles, especially commercial vehicles, mainly utilizes on-board multi-power switches. The driver inputs different vehicle load states through the on-board multi-power switch, including heavy load, medium load and light load. Under different vehicle load conditions, different maximum torques are used to limit the output of the engine to achieve fuel-saving control. The method of using vehicle multi-power switches for vehicle fuel-saving control, on the one hand, needs to rely on the driver's manual input; on the other hand, it only performs fuel-saving con...

AI Technical Summary

Problems solved by technology

The method of using the vehicle multi-power switch for vehicle fuel-saving control, on the one hand, needs to rely on the driver's manual input; on the other hand, it only performs fuel-saving control through different engine torque limits, and the fuel-saving effect is poor

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