Thermal management system for hybrid electric vehicle, control method and vehicle

Abstract

The invention provides a thermal management system for a hybrid electric vehicle, a control method and a vehicle. The thermal management system for the hybrid electric vehicle includes a high-temperature cooling circuit, a low-temperature cooling circuit and a switching unit, wherein the high-temperature cooling circuit communicates with a heat-dissipation device, a water pump, an intercooler, a high-pressure component and a transmission cooler, the low-temperature heating circuit communicates with the water pump, the intercooler, the high-pressure component and the transmission cooler, and the switching unit is used for selectively conducting the high-temperature cooling circuit and the low-temperature heating circuit. According to the thermal management system for the hybrid electric vehicle, heat generated by the high-pressure component is fully utilized to make an engine quickly heat up to improve emission, a transmission can further be quickly heated up to improve the transmissionefficiency of the transmission, the driving quality is improved, and the advantage of high energy consumption utilization is achieved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a heat management system, a control method and a vehicle of a hybrid electric vehicle. Background technique [0002] The thermal management system can effectively cool down the engine, etc., to ensure that it works within a suitable temperature range. Rapid warm-up technology is more and more widely used in hybrid electric vehicles. The thermal management system of hybrid electric vehicles adds a low-temperature circuit to meet the cooling requirements of high-voltage components (such as drive motor controllers, drive motors, etc.) on the basis of traditional thermal management systems such as gasoline vehicles. Additional water pumps are required, and waste heat is utilized low rate. [0003] There are following disadvantages: [0004] By controlling the flow of coolant to increase the engine warm-up speed, the engine warm-up speed is limited. The temperature rise of the...

AI Technical Summary

Problems solved by technology

[0004] Increase the engine warm-up speed by controlling the flow of coolant, the engine warm-up speed is limited

The heating of the transmission cannot rely on external heat sources, but can only rely on its own efficiency loss to raise the temperature. In the cold winter, it cannot heat up quickly, affecting the efficiency of the transmission and thus affecting the driving experience.

The heat generated by the high-voltage components is directly dissipated into the air through the radiator, resulting in serious loss of heat energy and low utilization rate

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