Diesel fuel injection systems play a key role in reducing emissions for meeting future emission standards, as well as achieving other performance parameters including fuel economy and combustion noise. In addition to adjustments in injection timing and injection pressure, rate shaping can improve emissions, noise and torque. Multiple injections, including pilot injections, post-injections and after-injections, are widely used to control PM and NOx emissions, noise and to manage aftertreatment. #

Understanding Fuel Injection Systems in Engines