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康明斯N和NH系列柴油机均采用PT燃油系统,该系列有两种类型:一是PT-G型泵,系调速器-控制型,二是PT-R型泵,系压力-调节型。 PT泵燃油系统的主要特点是:在Bosch公司的PT燃油系统中,燃油产生高压、定时分配和油量调节都在燃油泵中进行;在燃油泵和喷油器燃油系统中,燃油产生高压、定时分配和油量调节则在燃油泵和喷油器中进行,其进入喷油器的燃油只有20％左右自喷油器喷入燃烧室,余下的燃油对喷油器进行冷却和润滑后返回油箱。由于PT燃油系
Cummins N and NH series diesel engines are used PT fuel system, the series has two types: First, PT-G-type pump, governor - control type, the second is the PT-R-type pump, the Department of pressure - regulation. The main features of the PT pump fuel system are: In the PT fuel system at Bosch, high pressure fuel is produced, the timing distribution and fuel quantity regulation are carried out in the fuel pump; in the fuel pump and injector fuel system, the fuel generates high pressure, Timing distribution and fuel volume control in the fuel pump and injector, the fuel into the injector only about 20% from the injector into the combustion chamber, the remaining fuel on the injector after cooling and lubrication return tank. Due to PT fuel system