Patent ID: 7305939

Claim:
An apparatus converting an OEM type of fuel system of an OEM type engine using an OEM recommended fuel fed to the engine from an OEM type fuel tank, the apparatus comprising: an alternative fuel mixed with the OEM recommended fuel in the OEM type fuel tank; a fuel composition sensor added to the OEM type fuel system to detect a proportional amount of the alternate fuel in the OEM type fuel tank; at least one fuel injector driver circuit controlling an output signal to at least one fuel injector that meters an amount of the mixed fuel delivered to the OEM type engine from the OEM type fuel tank; an electronic control unit containing said fuel injector driver circuit added to the OEM type fuel system and arranged to receive an input from the fuel composition sensor; and the electronic control unit being arranged to change the output signal from the fuel injector driver circuit to the fuel injector to vary the amount of the fuel metered into the OEM type engine to maintain a correct air-to-fuel ratio needed for proper combustion of the mixed fuel from the OEM type tank.