Vehicle thermal management method and vehicle thermal management system

Abstract

The invention relates to a vehicle thermal management method and a vehicle thermal management system. In the method, an operator selects one cooling mode from an economical cooling mode and a reinforced cooling manner, a thermostat starting temperature corresponding to the selected cooling mode, a thermostat fully-starting temperature corresponding to the selected cooling mode and multiple first set gear shifting temperatures corresponding to the selected cooling mode serve as a first set temperature, a second set temperature and multiple first calibration temperature values. When the water outlet temperature of an engine is increased to the first set temperature, part of the thermostat is started; when the water outlet temperature of the engine is larger than the first set temperature and is increased, the opening degree of the thermostat is increased; when the water outlet temperature of the engine is increased to the second set temperature, the thermostat is fully started; and every time the water outlet temperature of the engine is increased or reduced to one first calibration temperature value, gear shifting is conducted on a fan. The system comprises a selector, a sensor, the fan and the thermostat. By means of the vehicle thermal management method and the vehicle thermal management system, the vehicle cooling purpose can be achieved when a retarder is started on the premise that the cost is increased as less as possible.

Description

technical field [0001] The invention relates to the field of complete vehicle cooling, in particular to a complete vehicle thermal management method and a complete vehicle thermal management system. Background technique [0002] The optimal working temperature of the engine is around 90°C. According to some data, when the engine outlet water temperature rises by 10°C, the heat taken away by the cooling water decreases by about 8% to 12%. For good economy, the general vehicle thermal management control strategy Set the engine outlet water temperature control target at around 90°C. [0003] The current national standard GB7258-2012 "Motor Vehicle Operation Safety Technical Regulations" requires that passenger cars with a vehicle length greater than 9 meters, trucks with a total mass greater than or equal to 12,000kg and special operation vehicles, and all dangerous goods transport vehicles, should be equipped with retarders or other auxiliary brakes Among them, there are hydr...

AI Technical Summary

Problems solved by technology

The method of increasing the auxiliary water tank increases the cost, increases the weight of the vehicle, and increases the fuel consumption of the vehicle, which is contrary to the development trend of lightweight

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