Vehicle control method and device and vehicle

Abstract

The invention relates to a vehicle control method and device and a vehicle. The method comprises the steps that the engine temperature, the engine rotating speed and the engine torque of the vehicle are obtained; and under the conditions that the temperature of the engine is within a preset temperature interval, the rotating speed of the engine is within a preset rotating speed interval and the torque of the engine is within a preset torque interval, downshifting operation is executed on the gear of a gearbox of the vehicle. Therefore, the heat efficiency of the engine can be improved by downshifting the gear of the gearbox of the vehicle, so that the overhigh temperature of the engine is reduced on the premise that the vehicle speed is not greatly influenced, the driving safety of the vehicle is ensured, the safety of the vehicle engine is protected, the oil consumption rate can be reduced by improving the heat efficiency of the engine, and the effect of saving oil is achieved to a certain extent.

Description

technical field [0001] The present disclosure relates to vehicles, and in particular, to a vehicle control method, device and vehicle. Background technique [0002] The vehicle engine is a device that converts chemical energy into mechanical energy through combustion. A large amount of heat energy is generated during the process, and the device itself must maintain a normal operating temperature, otherwise it will affect the service life and safety of the engine. The engine in the existing vehicle usually absorbs heat into the coolant through the coolant channel, and then dissipates it into the air through the vehicle cooling system. [0003] Although in the process of vehicle research and development, thermal damage tests (high load, large slope) are usually carried out to ensure that the engine water temperature of the vehicle will not exceed the temperature limit that it can withstand, but in actual use of the vehicle, due to the external environment Changes, it is very ...

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Problems solved by technology

[0003] Although in the process of vehicle research and development, thermal damage tests (high load, large slope) are usually carried out to ensure that the engine water temperature of the vehicle will not exceed the temperature limit that it can withstand, but in actual use of the vehicle, due to the external environment Changes, it is very likely that the engine temperature will exceed the temperature limit, such as overloading the vehicle in a high-temperature area and continuously climbing a hill, etc.

Under such driving conditions, the risk of damage to engine parts is greatly increased, and there is even a risk of engine scrapping

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