Research on Hybrid Electric Vehicle Engine Heating-Up Process and Fuel Consumption by Applying Auxiliary Heaters

摘要

Based on an engine of hybrid electric vehicle, the effect of auxiliary heating system on heating-up time and fuel consumption during the heating process of engine cooling system is investigated by the combination of experiment and simulation. The experimental results show that the auxiliary heating can obviously shorten the heating-up time and reduce the fuel consumption of system, regardless of synchronous heating or preheating. The fuel heater has a shorter heating-up time, while the PTC heater is more economical and green. The simulation results show that the body temperature has a great influence on the heating-up time of the cooling system, and the heating-up time of the coolant can be shortened obviously by using the auxiliary heater. In this research, the experiment and simulation are complementary and related to each other. The influence of auxiliary heating on the heating-up time and the fuel consumption are quantified. The purpose of this research is to find a way to shorten the heating-up time and improve fuel economy of hybrid power system.