What is the principle of the BMW 730 fuel tank?
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The principle of the BMW 730 fuel tank is to utilize the thermal energy generated by the engine during operation, adding a set of thermal circulation system between the engine, fuel tank, and water tank. Composition of the BMW 730 fuel tank: The original single fuel tank design is replaced by a combined fuel tank consisting of a main tank and an auxiliary tank. A water heater is installed at the bottom of the fuel tank to heat the main tank using the thermal energy generated by the engine. The fuel supply pipe of the main tank and the oil pipe of the auxiliary tank are connected to the engine oil circuit through an oil circuit conversion valve. The auxiliary tank is used when starting the car, and after driving 5-8 kilometers, the conversion valve is switched to cut the oil circuit into the main tank. Gasoline grades for the fuel tank: The main tank is filled with 0# oil, and the auxiliary tank is filled with -35# oil. The oil circuit of the main tank runs parallel to the heater pipeline, and a thermal insulation pipe is placed over the oil circuit pipeline and the heating pipeline to prevent the oil circuit from freezing in cold seasons.