Double-oil-tank oil supply system

Abstract

The invention provides a double-oil-tank oil supply system. The double-oil-tank oil supply system comprises a first oil tank, a second oil tank, a fuel conversion valve and a heating device; the gradeof diesel oil in the first oil tank is higher than the grade of diesel oil in the second oil tank; the heating device is used for heating the oil in the first oil tank; when a vehicle is cold startedin a cold region, the fuel conversion valve controls a fuel pipeline of the second oil tank to communicate with an engine oil way, and the heating device starts to heat the oil in the first oil tank;and after the temperature of the oil in the first oil tank is increased to reach a set oil temperature, the fuel conversion valve controls a fuel pipeline of the second oil tank to cut off from the engine oil way, and the fuel conversion valve controls communication between the fuel pipeline of the first oil tank and the engine oil way. The double-oil-tank oil supply system can guarantee normal cold start of the vehicle in the cold region, meanwhile, needs no mode of baking the oil tanks by fire to heat the oil, prevents the time and vigor wastes, improves the safety, and saves more costs.

Description

technical field [0001] The invention relates to the technical field of vehicle fuel supply systems, in particular to a double fuel tank fuel supply system. Background technique [0002] Condensation point and cold filter point are important indicators to characterize the performance of diesel oil at low temperature. The grades of diesel for vehicles are divided into six grades: 5#, 0#, -10#, ﹣20#, -35#, and -50# according to the freezing point. The freezing point is the highest temperature at which diesel oil loses fluidity in a low-temperature environment; the cold filter point indicates the highest temperature at which diesel oil can cause filter blockage when it passes through the fuel supply system of a diesel engine. When the diesel engine is working, the diesel oil is sprayed into the cylinder through the coarse and fine filters, and then through the high-pressure pump and fuel injector. When the temperature of diesel oil drops to the cold filter point temperature, t...

AI Technical Summary

Problems solved by technology

However, since the prior art only has a single fuel tank, and the inside of the fuel tank 11 is only filled with a single grade of diesel oil, after the vehicle stops in a cold area, especially after it is left overnight, the diesel crystallizes and the vehicle cannot be started normally, and the fuel tank 11 needs to be fired. Roasting causes a waste of time and energy, and its safety is low; if all low-grade diesel oil is filled in the fuel tank 11, it will cause a large increase in cost

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