Vehicle and fuel supply system for vehicle

Abstract

The invention discloses a fuel supply system for a vehicle. The fuel supply system comprises a main oil tank, an auxiliary oil tank and an oil tank change-over valve. The oil tank change-over valve comprises a valve body, a first valve element, a second valve element and a manual operation piece, a main oil tank channel and an auxiliary oil tank channel are formed in the valve body, the first valve element is arranged in the main oil tank channel and used for controlling opening and closing of the main oil tank channel, and the second valve element is arranged in the auxiliary oil tank channeland used for controlling opening and closing of the auxiliary oil tank channel; and the manual operation piece is in transmission with the first valve element and the second valve element and synchronously drives the first valve element and the second valve element to move, so that one of the main oil tank channel and the auxiliary oil tank channel is in a connected state, and the other one of the main oil tank channel and the auxiliary oil tank channel is in a closed state. The oil tank change-over valve is arranged to be an integrated manual oil tank change-over valve, and motor faults canbe avoided. In addition, oil supply and oil return of the auxiliary oil tank can be achieved while oil supply and oil return of the main oil tank are switched, and the situation that the auxiliary oiltank is evacuated or polluted by diesel oil of the main oil tank due to asynchronous switching of a split type manual oil tank switching valve is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a vehicle and a fuel supply system of the vehicle. Background technique [0002] At present, with the development of the heavy-duty truck industry, the dual-label fuel system, that is, the vehicle model matches two brands of diesel oil, has been widely used. As an important part of the dual-label fuel system, the fuel tank switching valve has a great influence on the product reliability and structure. There are two types of commonly used fuel tank switching valves: electric fuel tank switching valve and split manual fuel tank switching valve. [0003] However, the main problems of electric fuel tank switching valves are motor failure and valve body sticking, and the market failure rate is relatively high. The split-type manual switching valve is two separate switching valves, one for oil supply and the other for oil return. The main problem of the split-type manual switching va...

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Problems solved by technology

[0003] However, the main problems of electric fuel tank switching valves are motor failure and valve body sticking, and the market failure rate is relatively high

The split-type manual switching valve is two separate switching valves, one for oil supply and the other for oil return. The main problem of the split-type manual switching valve is that the operation is complicated. When switching is required, the driver must manually switch the two switching valves at the same time. If the user forgets to rotate the two handles at the same time, the auxiliary fuel tank will be evacuated or the auxiliary fuel tank will be polluted by the main fuel tank diesel, which will cause inconvenience and economic loss to the user. In addition, the pipeline layout of the split manual fuel tank switching valve is complicated , for tractors with a compact layout, it increases the difficulty of fuel system layout

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