FUEL SUPPLY SYSTEM FOR A LARGE TWO-STROKE COMPRESSION-IGNITED HIGH-PRESSURE GAS INJECTION INTERNAL COMBUSTION ENGINE

摘要

A fuel supply system for supplying high-pressure gas to a large two-stroke compression-ignited internal combustion engine. The engine is provided with a fuel injection system for injecting the supplied high-pressure gas into the combustion chambers of the engine. The fuel supply system comprises a feed conduit (9) connecting an outlet of a liquefied gas storage tank (8) to the inlet of a high-pressure pump (40) for transporting liquefied gas from the liquefied gas storage tank (8) to the high-pressure pump (40), a transfer conduit (50) connecting the outlet of the highpressure pump (40) to the inlet of a high-pressure vaporizer (14) for transporting high-pressure liquefied gas from the high-pressure pump (40) to the high-pressure vaporizer (14), a supply conduit (18) connecting the outlet of the highpressure vaporizer (14) to an inlet of the fuel injection system of the engine for transporting high-pressure vaporized gas to the fuel injection system of the engine. The high pressure pump (40) comprises two or more pump units (41,42,43). Each pump unit (41,42,43) comprises a pump piston (62) slidably disposed in a pump cylinder (61) and a hydraulically powered drive piston (46) slidably disposed in a drive cylinder (45) with the drive piston (46) coupled to the pump piston (62) for driving the pump piston (62).