The high pressure common rail system consists of five parts: high pressure oil pumps, common rail cavities and high pressure fuel lines, fuel injectors, electronic control units, and various types of sensors and actuators. The fuel supply pump pumps fuel from the fuel tank into the oil inlet of the high-pressure pump. The engine-driven high-pressure oil pump pressurizes the fuel and feeds it into the common rail cavity. The solenoid valve controls each cylinder injector to inject fuel at the relevant time. The pressure regulating solenoid valve on the high pressure oil pump can flexibly adjust the oil pressure in the common rail cavity according to the engine load conditions and economical and emission requirements, and in particular optimize the low speed performance of the engine.
The high pressure common rail system uses a large-capacity common-rail chamber to accumulate high-pressure fuel from the pump, eliminate pressure fluctuations in the fuel, and then deliver it to each injector. Injection is achieved by controlling the solenoid valve on the injector. The beginning and termination.