Patent ID: 9709013
Date: 2017-07-18
CPC Classifications: F01M,F02M

Claim:
1. Fuel system for supplying pressurised fuel to an internal combustion engine, the fuel system comprising: 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 vapour 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; 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 vapour leakage from the housing.