In order to take full advantage of an engine‘s exhaust waste heat and to solve the difficult problem of starting a diesel engine during the winter

a set of diesel fuel heating and quick start system was designed. After using the low grade diesel fuel in the secondary fuel tank to start the engine. The exhaust gas was directed into the main fuel tank from the exhaust pipe through a stainless steel heat pipe to heat the high-grade diesel fuel. The exhaust waste heat characteristics of a six-cylinder diesel engine and its recovery potential were analyzed respectively through the engine bench test. On this basis the working performances of the heat pipe and its system were also tested and analyzed. Results show that at least 1/3 of the diesel engine exhaust waste heat can be where the engine is running in the whole operating range and the exhaust gas temperature range is between 440K and 800K. This systems start up time is only 275 seconds and available heating temperature is within the range of 350K to 600K. Finally

the relationship between BSFC brake specific fuel consumption(BSFC) and fuel temperature at the specified engine speed was obtained through the experiment. Results prove that the diesel fuel heating and quick start system used in winter has a significant effect on the fuel economy of the engine.