Research for Ultra-low Emissions Diesel Engine Two-valve Control Fuel System

To carry out ultra-low emission for diesel engine, a new technology is presented. ECU control circuit for the dualsolenoid valve system was built and experimental control interface were designed. Three conditions experiments are finished:(1)Conditions of the regulation characteristics of the same target;(2) Performance of low-speed high-pressure injection;(3) Loop between the dynamic regulation performance. Results show that double solenoid valve system on the same target conditions can be quickly and easily change the injection characteristics, enhanced fuel injection characteristics of the controllability of the system; through the two valves are open and flexible combination of timing control, low speed engine, they can easily achieve high-pressure fuel injection; by changing the control valve and the duration of time, two-valve system can be quickly and flexibly adjust the diesel engine fuel injection characteristics of each work cycle to meet the needs of the engine in different conditions, and can greatly improve engine performance and achieve ultra-low emissions.