The direct injection engines work with the hybrid electric motor. With the direct injection the fuel is directly injected into each engine cylinder. The engine works well with the hybrid electric motors because the engines can be smaller and turned off automatically when not needed. This helps increase the gas mileage and also the emissions that are let off in the air. The engine has a self-triggering ignition.
Fuel cells operate by converting hydrogen and oxygen into electricity.
The fuel cell alleviates combustion as an intermediate step. Therefore fuel cells are a clean energy alternative to conventional generating methods. They eliminate most of any sulfur and nitrogen methods. In addition, the fuel cell can utilize a variety of fuels as long as a fuel processor can release the hydrogen contained in them. Fuel cells are most efficient when operating on pure hydrogen because the hydrogen can be stored on the fuel cell.