Whole vehicle heat management system for plug-in hybrid electric vehicle

Abstract

The invention discloses a whole vehicle heat management system for a plug-in hybrid electric vehicle. The whole vehicle heat management system comprises a high-temperature system, an inner-cooling low-temperature system and a battery low-temperature system. In the high-temperature system, a cylinder temperature adjuster, a radiator temperature adjuster and a PTC (positive temperature coefficient)heater are opened and closed, flow distribution of cooling liquid is controlled, so that the temperature rapidly rises when cold boot is implemented, an engine is rapidly heated, and oil consumption and omission are reduced. In an EV (electric vehicle) mode, control of tee is implemented. At the heating stage, a series circuit is formed between a battery and a motor controller, a series circuit isformed between a charging machine and a driving motor, the battery is heated by heat of the motor controller, the charging machine and the driving motor, optimal operating temperature of the batteryis kept, and energy cannot be wasted. At the cooling state, a circulation system is divided into two independent circulation systems, and optimal operating temperatures of the battery, the motor controller, the charging machine and the driving motor are ensured. According to the system, engine heating speed can be effectively improved, and oil consumption and omission are reduced.

Description

technical field [0001] The invention belongs to the field of thermal management of hybrid electric vehicles, in particular to a vehicle thermal management system of a plug-in hybrid electric vehicle. Background technique [0002] In recent years, with the approaching of the energy crisis and the continuous improvement of environmental protection requirements, the importance of energy conservation and emission reduction to environmental protection has gradually attracted the attention of the government and major vehicle manufacturers. The energy saving and emission reduction of traditional vehicles can no longer meet the increasingly stringent requirements of regulations on fuel consumption and emission. In this context, the hybrid electric vehicle has been developed rapidly. In the hybrid electric vehicle, it generally includes a traditional power engine and has a power battery system at the same time. [0003] The traditional engine warm-up refers to the process that the t...

AI Technical Summary

Problems solved by technology

When the engine is cold, due to the low temperature of the intake system and the cylinder, it is difficult for the gasoline to evaporate completely, resulting in incomplete combustion, causing a large amount of C and H emissions; at the same time, due to the difficulty of fuel evaporation and poor combustion conditions, additional fuel consumption is increased , causing a greater degree of deterioration in the fuel consumption and emissions of the vehicle

[0004] When the power battery is at low temperature, due to the limitation of the low temperature performance of the battery itself, it generally has a power battery heating system, in which a PTC heater is generally used in the heating system. Since the PTC heater generally has a large power, the PTC heater is used for Heating the power battery will consume the battery power of the hybrid vehicle and reduce the cruising range of the hybrid vehicle

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