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喷油器技术状态对发动机的经济、功率以及生态学的指标均有很大的影响,使用调查表明,起阀压力P_(f0)下降、喷雾质量恶化、断油密封性变差及喷嘴流通能力增大的主要原因是喷油器密封锥面的磨损。在这种情况下,由于喷油器针阀锥面同壳体锥孔的相互磨合,燃油的密封是依靠喷油器针阀的密封锥面同针阀体锥孔一起所形成的实际接触带而实现的,其直径要比初期起密封作用的密封带直径小些。由于密封锥面的磨损,使喷油器的实际密封圈直径减小,这是长壳型喷油器的一个特点,因为
Injector technical status of the engine economy, power and ecological indicators have a great impact, the use of surveys show that from the valve pressure P_ (f0) decline, the deterioration of the quality of the spray, the deterioration of oil seal and nozzle flow capacity The main reason for the increase is the wear of the injector seal cone. In this case, the seal of the fuel depends on the seal contact surface of the needle valve of the injector and the actual contact zone formed by the tapered bore of the needle valve The realization of its diameter than the sealing effect from the initial seal with a smaller diameter. Due to the wear of the sealing cone, the actual seal diameter of the injector is reduced, which is a feature of long-shell injectors because