Spark Ignited Gas Conversion

The E² Spark Ignited Prechamber (SIP) natural gas conversion is designed for the EMD two-cycle diesel engines. It utilizes a direct injection system, a prechamber combustion spark ignition system, and an advanced full-authority electronic engine controller.

By means of an electro-hydraulic injector incorporated into the cylinder head, natural gas is injected into the cylinder near the bottom of the piston’s stroke when cylinder pressures are low. This requires far less injection pressure than late-cycle injection, and allows fuel and air to mix thoroughly during compression. The system achieves full rated engine horsepower with only 120-150 psi of injection gas supply pressure.

The E² Spark Ignited Prechamber is installed in place of the EMD diesel injector, and at the top of the piston’s stroke provides enough ignition energy to light the lean mixture of natural gas and air in the main combustion chamber. This oil-cooled prechamber is supplied with natural gas separately from the main chamber, and the engine controller is called upon to continuously adjusts the prechamber air-fuel ratio for complete combustion.

In order to reduce emissions and improve the quality of combustion at low engine speed and load, E² employs innovative control techniques to manipulate combustion characteristics. A spark ignited, 100% gas EMD engine runs smoothly from Low Idle to Notch 8.

E² direct injection design: – Extends the life of injectors and other fuel system components – Improves the safety of the working environment on and around the engine – Maximize fuel savings with 100% natural gas – Reduces energy consumption

These benefits of the ECI design translate into emission reductions and cost savings in both the initial investment and the operation of the equipment.