Patent ID: 8245695

Claim:
A liquid fuel injection system for a combustion engine, comprising: a pressure tank containing liquid petroleum gas (LPG) fuel in liquid form; a fuel line extending from the pressure tank and communicating with a variable volume accumulator and fuel injectors for the combustion engine; and a high pressure electric pumping system having an electric pump in communication with the fuel line; wherein the electric pumping system is set to switch the electric pump on and off to control fuel pressure in the fuel line, fuel injectors, and the variable volume accumulator such that the pressure is at least 2.4 MPa and the LPG is maintained in liquid form through the fuel line, the variable volume accumulator, and the fuel injectors; and wherein the accumulator has sufficient liquid LPG capacity to facilitate starting of the combustion engine with liquid LPG supplied to the fuel injectors following a period of shut down.