Honda is on the fourth generation of its integrated engine/motor hybrid design. The system combines a 1.3 liter iVTEC 4-cylinder engine with a 20-hp electric motor to deliver a total of 110 hp. The nickel metal hydride battery pack has a 158 volt output. In addition to turning the engine off at stops, the Civic can save fuel by de-activating all of its cylinders and cruise under electric motor power alone in some circumstances. With the electric motor attached to the engine’s crankshaft, the engine never stops turning when the car is moving, as it does in the Toyota and Ford hybrids, but it can shut off the fuel supply and valves, which has a similar effect. Also, the engine uses eight spark plugs to allow greater flexibility with the firing order for more complete combustion of fuel in the cylinder. Add an improved battery pack and regenerative braking from the previous generation to produce a hybrid with Advanced Technology Partial Zero Emissions status.