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FUEL SYSTEM AND METHOD FOR REDUCING FUEL LEAKAGE FROM A FUEL SYSTEM
FUEL SYSTEM AND METHOD FOR REDUCING FUEL LEAKAGE FROM A FUEL SYSTEM
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机译:减少燃油系统中燃油泄漏的燃油系统和方法
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摘要
A fuel system is provided for supplying pressurized fuel, in particular dimethyl ether (DME) or a blend thereof, to an internal combustion engine. The fuel system includes a fuel pump, which has a pumping mechanism arranged partly in a housing containing lube oil, a drain line connected to the housing and suitable for draining at least fuel vapor from an interior of the housing, a lube oil supply line connected to the housing, a lube oil supply valve installed in the lube oil supply line, a seal installed between the pumping mechanism and the housing for preventing at least lube oil leakage to the outside of the housing, and a drain valve installed in the drain line, wherein both the drain valve and lube oil supply valve are controlled to be closed during an engine non-running state for preventing fuel vapor leakage from the housing.
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