Patent ID: 7869930

Claim:
A method of controlling fuel supplied to an engine of a vehicle, the vehicle including a first fuel storage tank to store a first type of fuel and a second fuel storage tank to store a second type of fuel, the engine including at least one cylinder having a port injection fuel injector being supplied with fuel from at least one of the first fuel storage tank and the second fuel storage tank and a direct injection fuel injector being selectively supplied with fuel from one of the first fuel storage tank and the second fuel storage tank, the method comprising: at a first condition, supplying at least some of the second type of fuel from the second fuel storage tank to the direct injection fuel injector and supplying at least some of the first type of fuel from the first fuel storage tank to the port injection fuel injector; and at a second condition, supplying at least some of the first type of fuel from the first fuel storage tank to the direct injection fuel injector.