Diesel engine for a LPG-diesel mixture

摘要

A diesel engine for combusting a diesel-LPG mixture includes a fuel system for supplying diesel and LPG. The mixture is obtained by combining the fuel flow from a LPG tank and diesel tank. Increased pressure is applied in both fuel flows for mixing purposes. Immediately following the mixing a circulation system is present in which increase in pressure also takes place, wherein a part of the mixture is supplied to a high-pressure pump for injection to the diesel engine and a part is recirculated. In a method of supplying the diesel-LPG mixture, the part of the mixture that is supplied to the high-pressure pump is returned to a position upstream of the mixing point. The pressure in the fuel system is higher downstream of the mixing point. When the LPG supply is switched off the pressure can be gradually decreased through circulation.

主权项

1. A diesel engine comprising a direct injection injector arranged in the combustion chamber thereof and forming part of a fuel system which comprises a first storage for diesel fuel with a diesel supply conduit and an auxiliary diesel pump, a second storage for LPG with a LPG supply conduit, wherein the supply conduits are connected via a shared conduit to a shared high-pressure pump, wherein the outlet conduit of the high-pressure pump is connected to the injector and wherein a return conduit for fuel is present, wherein the shared conduit is a mixing conduit, and wherein the return conduit is arranged between the shared conduit and a position upstream of the inlet of the auxiliary diesel pump.