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20.柴油机燃油消耗量过大的原因? 答:柴油机燃油消耗量的大小,可用百公里行车情况比较来判断。如果柴油机加速等方面正常,怠速比较稳定,出现耗油最过大,是燃油系统的故障,否则是其他方面的问题。燃油系方面: 喷油泵供油量调整过大;各缸供油量不均匀;喷油泵漏油严重;柱塞偶件磨损。当增大柱塞的有效供油行程时,必然增大供油量,产生燃烧不完全,造成柴油机耗油量过大。另外,柱塞偶件密封性差而渗漏燃油;喷油器喷油压力过低;调压弹簧变形、折断;喷油嘴偶件磨损过
20. Diesel fuel consumption is too large? A: The size of diesel fuel consumption, traffic conditions can be compared with 100 kilometers to judge. If the diesel engine acceleration and other aspects of normal, relatively stable idle, fuel consumption is the largest, is the fuel system failure, otherwise it is the other aspects. Fuel system: injection pump fuel supply adjustment is too large; uneven supply of fuel for each cylinder; fuel injection pump serious oil leakage; plunger wear. When increasing the plunger effective fuel supply stroke, the inevitable increase in fuel supply, resulting in incomplete combustion, resulting in diesel fuel consumption is too large. In addition, the poor sealing of the plunger coupling and leakage of fuel; injector injection pressure is too low; pressure regulating spring deformation, broken;