Patent ID: 7318423
Filing Date: 2008-01-15
Classification: F02D,F02M,Y02T

Abstract:
1. A DME fuel supply device for a diesel engine having: a feed pump for pressurizing DME fuel in a fuel tank to a specified pressure and delivering it into a feed pipe; an injection pump for delivering DME fuel in a fuel gallery into which the DME fuel delivered via the feed pipe flows in a specified amount to an injection pipe communicated with a fuel injection nozzle of the diesel engine at specified timing; an overflow fuel pipe for returning DME fuel overflowed from the fuel injection nozzle and DME fuel overflowed from the injection pump to the fuel tank; and residual fuel retrieving means for retrieving DME fuel remaining in the fuel gallery and the overflow fuel pipe after stopping the diesel engine into the fuel tank; the DME fuel supply device comprising: a vapor-phase pressure delivery pipe connecting an inlet of the fuel gallery to which the feed pipe is connected and a vapor phase in the fuel tank; and a vapor-phase pressure delivery pipe switching solenoid valve for opening and closing the vapor-phase pressure delivery pipe.