Common Rail fuel injection system, represented by the electronically controlled fuel injection technology

With Common Rail fuel injection system , represented by the electronically controlled fuel injection technology can achieve at any speed, the conditions of the high-pressure fuel injection, which is to improve the engine speed , low- load conditions are particularly favorable performance . Since maximum allowable injection pressure is determined by high-pressure pump main parts stiffness and tightness of the decision, therefore , greatly improve the high-pressure fuel injection pump pressure will inevitably encounter operational reliability , especially excessive  Instrument valve manifolds  plunger caused by the fuel pressure is difficult to establish a higher issue. In this paper, common rail fuel system pressure pumps designed a number of key technical issues , to carry out a theoretical analysis, component design and structural improvements study to solve the pump plunger  Stainless steel needle valve  problem . This study content and innovation are mainly the following aspects: the extensive reading relevant literature , based on the high-pressure common rail fuel system components , working principle, research status at home and abroad were summarized , a comprehensive analysis of high-pressure rail fuel system work characteristics , as well as improved fuel injection pressure , effective control of the fuel pump leakage key technical problems faced .