How do NGVs work?
The only major difference between a gasoline vehicle and an NGV is the fuel system. Natural gas is compressed to between 3,000 and 3,600 pounds per square inch (200 bar) and is stored on board the vehicle in cylinders installed in the rear, undercarriage, or on the roof. When natural gas is required by the engine, it leaves the cylinders, passes through a master manual shut-off valve and travels through a high-pressure fuel regulator located in the engine compartment. The natural gas is injected at atmospheric pressure through a specially designed natural gas mixer where it is properly mixed with air. Natural gas then flows into the engine’s combustion chamber and is ignited to create the power required to drive the vehicle. Special solenoid-operated valves prevent the gas from entering the engine when it is shut off.
