Engine control method and device and vehicle

Abstract

The invention provides an engine control method and device, a vehicle and an electronic controller applied to the vehicle. The method comprises the steps that an engine water temperature value, a vehicle speed value, an engine load value and an environment temperature value are obtained; under the condition that the engine water temperature value is larger than a first early warning water temperature value, the altitude value of the position where the vehicle is located is obtained; under the condition that the altitude value is larger than a preset altitude threshold value, a target vehicle gear is determined on the basis of the altitude value, the vehicle speed value, the engine load value and the environment temperature value, so that the transmission downshifts on the basis of the target vehicle gear; and under the condition that the information that the transmission performs downshift based on the target vehicle gear is received, the rotating speed of the engine is controlled to be increased to increase the water flow of the engine, so that the heat dissipation performance of the whole vehicle is improved, the water temperature value of the engine is reduced, the risk that the temperature of the engine is too high under the plateau working condition is avoided, and the service life of the engine is prolonged. And the reliability and the stability of the vehicle are improved.

Description

technical field [0001] The present invention relates to the technical field of vehicle control, and in particular, to an engine control method, device and vehicle. Background technique [0002] With the popularity of vehicles, relying on vehicles to travel has become the mainstream. Vehicles include engines. The maximum working water temperature of the engine refers to the maximum water temperature when the engine can work normally. When the water temperature exceeds the maximum working water temperature, the engine has cylinder head deformation and Risk of air leakage from the cylinder head gasket, causing the engine to not work properly. [0003] At present, regarding the water temperature protection strategy of the engine, the water temperature of the engine exceeds the maximum working water temperature, and the output torque of the engine is limited. For high altitude areas, due to the reduction of air density, the heat dissipation performance of the whole vehicle will ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose an engine control method, device and vehicle to solve the problem that in high altitude areas, the heat dissipation performance of the whole vehicle will be further reduced, which will cause the engine water temperature to exceed the maximum operating water temperature of the engine for a short time. Directly restricting the output torque of the engine will cause the user to be unable to use the vehicle normally under plateau conditions, reduce the stability and reliability of the vehicle, and reduce the user's driving experience.

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