Liquefied Gas Fuel Supply Device of Diesel Engine

摘要

In a diesel engine system of a liquefied gas fuel, the present invention aims at the prevention of storing of the liquefied gas fuel in a cam chamber even when a diesel engine repeats stopping and operation thereof without returning the liquefied gas fuel in a fuel gallery of a fuel pressurizing device such as a supply pump or an injection pump to a fuel tank. An electrically-operated compressor 16 e is subjected to an ON/OFF control by a cam chamber pressure regulating part 20. In the inside of a cam chamber 12, a cam chamber pressure sensor 121 which detects a pressure in the inside of the cam chamber 12 is arranged. A cam chamber pressure regulating part 20 performs an OFF control of the electrically-operated compressor 16 e when a detected pressure of the cam chamber pressure sensor 121 is a predetermined value or less, and performs an ON control of the electrically-operated compressor 16 e so as to reduce the pressure in the inside of the cam chamber 12 to the predetermined pressure or less at a point of time that the detected pressure of the cam chamber pressure sensor 121 exceeds the predetermined pressure thus reducing the pressure in the inside of the cam chamber 12 by suction.