FUEL GAS SUPPLY SYSTEM OF DUAL-FUEL DIESEL ENGINE

摘要

A fuel gas supply system of a dual-fuel diesel engine comprises: a gas inlet pipe (1) provided with a gas inlet pressure sensor; a pressure relief flame retardant apparatus mounted on a back side of a gas inlet manifold of the gas inlet pipe; and a fuel gas common rail pipe (21) fixed on the gas inlet pipe (1) and provided with a fuel gas inlet connector and a pressure sensor (25) of the fuel gas common rail pipe. A gas outlet is provided with a fuel gas ejector (22). Fuel gas jet tubes of the fuel gas ejector (22) extend into gas inlet manifolds of gas inlet pipes corresponding to cylinders. The fuel gas supply system of the dual-fuel diesel engine has a compact and proper structure, and fuel gas jet tubes are mounted on gas inlet manifolds corresponding to cylinders, so that fuel gases are mixed in gas inlet passages of cylinder covers, and the response speed is high; each cylinder can separately control the opening and closing of fuel gas by using the fuel gas ejector, thereby eliminating scavenging loss in valve overlapping time.