Patent ID: 7055506

Claim:
A fuel control system for a dual fuel combustion engine of a vehicle comprising a fuel source of liquefied gas; a phase converter for converting the fuel from a liquid state to a gaseous state, said phase converter is in fluid communication with the fuel source; control means for controlling the supply of said fuel to the engine in response to one or more sensor signals, said sensor signals comprise a throttle position signal which indicates the position of the throttle with respect to load and an alternator signal which indicates the operational status of the engine; a valve means actuated by the control means to control the supply of said fuel in a gaseous state, said valve means is in fluid communication with said phase converter; mixer means for mixing the fuel in a gaseous state with air in the engine manifold, said mixer means is in fluid communication with the valve means; display means mountable in the vehicle cabin and operationally connected to the control means, said display means comprises a fuel gauge, an override switch and adjustment means for adjusting the parameters for the control of supply of said fuel; wherein the control means is programmed to close the valve means preventing the supply of said fuel when the throttle position is in an idling position or substantially fully open, and when the engine is not operating.