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作者在探讨了低速低负荷区域的异常喷射量特性之后,提出了两项解决措施,其一是定残压 出油阀,可滋借鉴。 一、前言 近年来,由于对车用柴油机降低油耗的要求,所以采用直喷式发动机比预燃室式发动机要多,并且因要求排气净化和提高燃烧性能,故向提高喷射压力、增加喷射能量,以及喷雾微粒化和增大贯穿度的方向发展。但是,也随之带来许多问题,在高速高负荷时产生二次喷射和气蚀、穴蚀问题。
After discussing the characteristics of abnormal injection quantity in low-speed and low-load area, the author put forward two solutions. One of them is the fixed residual pressure oil-out valve, which can be used for reference. I. Introduction In recent years, due to the requirements of reducing the fuel consumption of diesel engines for vehicles, the use of direct injection engines requires more fuel than the pre-combustion chamber engines and, because of the requirement of exhaust gas purification and improvement of combustion performance, the injection pressure is increased and the injection is increased Energy, as well as spray atomization and increase the penetration of the direction of development. However, many problems are brought along with it, causing secondary injection and cavitation and cavitation problems at high speed and high load.