Control method of engine output torque, control device of engine output torque and automobile

Abstract

The invention provides a control method of an engine output torque, a control device of the engine output torque and an automobile, and relates to the technical field of electronic control. The control method comprises the steps that a current engine speed, a current output torque and a current water temperature when an engine of the automobile is in service are acquired; when the current water temperature is greater than a preset water temperature maximum threshold, a torque threshold corresponding to the current engine speed is acquired; and when the current output torque is greater than the torque threshold, the current output torque is adjusted to the torque threshold. By adjusting the current output torque of the engine, the power output of the engine can be controlled, and the heat dissipation capacity of the automobile can be adjusted according to different service environments, so that the heat dissipation capability and the power output of the engine are improved effectively.

Description

technical field [0001] The invention relates to the technical field of electronic control, in particular to a method and device for controlling the output torque of an engine and an automobile. Background technique [0002] With the general trend of energy saving and emission reduction, although modern vehicle engines have made great progress compared with the beginning of invention, the energy conversion efficiency of the engine is still not high enough in the process of converting chemical energy into mechanical energy. This causes the engine to generate a large amount of heat during the working process, and the energy converted into heat accounts for about 60% to 70% of the chemical energy of the fuel, and the heat needs to be discharged through the cooling system of the vehicle. If under some extreme environmental conditions, the heat dissipation capacity of the vehicle's cooling system is not enough to dissipate the heat emitted by the engine, the output power of the en...

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Problems solved by technology

However, this method does not take into account the influence of internal and external environmental factors on the cooling system's heat dissipation capacity when the vehicle is running. For example, when the vehicle is running at a high speed in a high gear, and when the vehicle is driving at a low gear at a medium speed, although the engine speed may be the same, However, the heat dissipation capacity of the vehicle cooling system is different.

So in some cases, this strategy will cause the engine output torque to be too low, affecting the power output of the engine and causing customer complaints

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