In dual fuel mode, natural gas is introduced into the engine’s intake system. The air-to-natural gas mixture is then drawn into the cylinder, just as it would be in a spark-ignited engine, but with a leaner air-to-fuel ratio. Near the end of the compression stroke, diesel fuel is injected and ignites, causing the natural gas to burn.

A dual fuel engine can operate on 100 percent diesel fuel or the substitution mixture of diesel and natural gas, delivering the same power density, torque curve and transient response as the base diesel engine.

Benefits of Dual Fuel Engines

In the oil and gas market, fuel is one of the largest contributors to total cost of operation. Cummins Dual Fuel engines allow for impressive reductions in these costs. The rapid expansion and abundance of natural gas in some areas of the world provides a dramatic cost advantage.