Development of an Electronically Controlled Sequential Injection Dedicated CNG Engine

A spark-ignited dedicated CNG engine was developed on the base of a CY6105Q diesel engine.On this CNG engine the electronically controlled sequential multi-point gas injection technology and high-energy ignition system were adopted,and the induction system,combustion system were optimized.The experimental results show that the dedicated CNG engines dynamic performance is nearly equivalent to that of the original diesel engine,the torque characteristics at lower speed is improved,and the exhaust emission can meet the demands of the Euro I standards.The engine economic performance is improved because the fuel consumption relies on the cheap natural gas 100 percent.