A vehicle with two separate fuel systems designed to run on either fuel, using only one fuel at a time. These systems are advantageous for drivers who do not always have access to an alternative fuel refueling station. Bi-fuel systems are usually used in light-duty vehicles. One of the two fuels is typically an alternative fuel.
A motor vehicle that operates on two different fuels, but not on a mixture of the fuels. Each fuel is stored in a separate tank.
a vehicle that can operate on two fuels, but not simultaneously
A vehicle with two separate fuel systems designed to run on either an alternative fuel, or gasoline or diesel, using only one fuel at a time. Bi-fuel vehicles are referred to as “dual-fuel” vehicles in the CAA and EPACT.
a vehicle with two separate fuel systems designed to run on either an alternative fuel or a conventional fuel using only one fuel at a time. The AFS Sparrow operates as a bi-fuel system.
A vehicle with two separate fuel systems designed to run on either an alternative fuel or a conventional fuel using only one fuel at a time. Typically, gasoline/natural gas bi-fuel vehicles are gasoline vehicles converted to bi-fuel operation by adding natural gas fuel storage, pressure regulation and control systems. In some Bi-fuel vehicles, gasoline is required to start the engine, even if the fuel selector is switched to natural gas.
A vehicle that can run either on an alternative fuel or on gasoline, switching back and forth between them as needed (see diagram on my page about alternative drivetrains).