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(1)故障现象1台配置WD61 5.92E柴油机的QY25B型汽车起重机,常发生自动熄火故障。主要表现为:柴油机在规定的怠速状态下,不能长时间持续运转;柴油机启动后,驾驶员的脚离开加速踏板就熄火;车辆在行驶中,驾驶员抬起脚去踏制动踏板时,柴油机就会自动熄火。(2)原因分析该型柴油机自动熄火的原因一般有以下几点:一是调速器的怠速弹簧、稳定器弹簧、负荷控制杆怠速限位螺钉调整不当;二是加速踏板及其拉杆调整不当;三是柴油中含水、杂质或油路中有空气;四是输油泵出现故障;五是柴油机的运转阻力过大。
(1) Symptom 1 QY25B type truck crane equipped with WD61 5.92E diesel engine often has automatic flameout failure. Mainly as follows: Diesel engine in the provisions of the idle state, can not continue for a long time; diesel engine starts, the driver’s foot to leave the accelerator pedal to turn off; vehicle driving, the driver raised his foot to brake pedal, the diesel engine It will automatically turn off. (2) Analysis of the reasons for this type of diesel engine flameout are generally the following: First governor idle spring, stabilizer spring, load lever idle limit screw improper adjustment; second accelerator pedal and its rod is not properly adjusted ; Third, diesel in water, impurities or oil in the air; Fourth, pump failure; Fifth, the operating resistance of diesel engines is too large.