Patent ID: 7287517
Filing Date: 2007-10-30
Classification: F02D,F02M,Y02T

Abstract:
1. A DME fuel supply device for a diesel engine having: an injection pump for delivering DME fuel supplied from a fuel tank via a feed pipe in a specified amount to an injection pipe in communication with a fuel injection nozzle of a diesel engine at specified timing; an overflow fuel pipe for returning the DME fuel overflowed from the fuel injection pump to the fuel tank; a nozzle return pipe for delivering the DME fuel overflowed from the fuel injection nozzle to the overflow fuel pipe; and residual fuel retrieving means for retrieving the DME fuel remaining in a fuel gallery, the nozzle return pipe and the overflow fuel pipe after stopping the diesel engine into the fuel tank; the DME fuel supply device comprising: a oil separator for separating the DME fuel contained in lubricating oil in the cam chamber in the injection pump having an exclusive lubricating system which is separated from the lubricating system of the diesel engine; a compressor for pressurizing the DME fuel separated by the oil separator and delivering it to the fuel tank; a low-pressure tank disposed between the oil separator and the compressor; a purge pipe for communicating the low-pressure tank and the overflow fuel pipe; and a purge pipe switching solenoid valve for opening and closing the purge pipe.