The Study On A Novel Pump-Rail-Valve-Injector Fuel Injection System

Energy and environment have been the most important topics in resent years. With the increasing concerns on health and environment,countries around the world bring forward increasingly tightening regulation for reducing emission. As a solution,clean liquefied fuels become more and more important. Dimethyl Ether is a Promising alternative fuel introduced in this paper. The original pump-line-nozzle injection system was found to be not well suited to alternative fuels.This paper introduces a novel electronically controlled pump-rail-valve-injector fuel injection system. In order to realize the programs,an electronically controlled fuel injection system has been developed to control the injection of fuels in cylinders. The experiment results showed that this system was powerful,reliable,and has high ability to resist disturbance.The bench testing tells us the system's characteristics of injection are suitable to injection of clean liquefied fuels. We know the parts of system will influence the system's function. The experiment results of a 495 engine showed that the system is successful. The system's basic characteristics also make it suitable for direct injection of Dimethyl Ether in compression-ignition engines,and direct injection of liquid propane and methanol & ethanol in spark-ignition engines.