In order to improve the fuel injection evenness of an electronic unit pump

an in-line distributor injection pump with single plunger controlled by solenoid valve was designed and developed. With electromagnetic fuel control structure

free adjustment of fuel injection quantity and injection timing angle was realized. And the distributor enabled the single plunger to deliver injected fuel to each cylinder

solving the issue of unevenness of fuel injection to each cylinder caused by multiple electromagnetic valves

multiple plungers and multiple fuel control valves. The effects of valve body stroke

fuel pressure in low pressure cavity

rotating speed

fuel delivery rate

electric current and fuel temperature on fuel injection characteristics were experimentally analyzed. The pump was tested for emissions with a 498 non road diesel engine. The results show that the pump can make the engine meet the requirement of China Ⅲ emissions regulation for non-road engines.