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一、柴油机自动熄火 小四轮拖拉机在运输途中出现自动熄火,在确认燃油供给系统和曲柄连杆机构无故障的情况下,第一种原因是喷油嘴卡死(可以摇转曲轴听喷油器有没有喷油声来断定,出油阀磨损后喷油嘴漏油除外);第二种原因是喷油压力低。这时拆下喷油器,利用车身或拖斗的某个位置卡往喷油器,用扳手卸下喷油嘴,将卡死的针阀顶出,放出少许柴油清洗后,将针阀与针阀体旋转研磨后清洗再装入喷油器,然后连接好高压油管,使喷油器朝外,把油门放在最大位置,摇转曲轴,试调喷油器压力,若喷射时发出清脆的“噗噗”声,表示雾化良好,此时装到缸盖上连接好油路,起动发动饥。 二、柴油机没有小油门 柴油机在工作中处于小油门时自动熄火。这时在停车状态下,放下减压杆,摇转曲轴,摇快时有喷油声,摇慢时没有喷油声,一般情况下是柱塞副磨损。摇慢时柱塞副泄漏严重,不能产生足够的压力使喷油器喷油,此时应卸下喷油器适当降低喷油器压力,使发动机在低转速情况下,暂时也能够正常喷油。
First, the diesel engine auto-ignition small four-wheel tractor in the transport appears automatic flameout, the fuel supply system and crankshaft linkage mechanism in the confirmation of trouble-free situation, the first reason is the nozzle stuck (you can crank crankshaft to listen to fuel injection There is no injection device to determine the sound, after the oil valve nozzle leakage except for wear and tear); The second reason is the low injection pressure. Then remove the fuel injector, the use of body or trailers to a certain location card to the injector, remove the nozzle with a wrench, the stuck needle out of the top, release a little diesel cleaning, the needle and After the needle body is rotated and cleaned, it is cleaned and then loaded into the injector. Then connect the high-pressure tubing so that the injector faces outwards and the throttle is in the maximum position. Swing the crankshaft to test the pressure of the injector. If the injector emits crispness The “puff puff” sound, said good atomization, this time mounted on the cylinder head connected to the oil circuit, start the hunger. Second, there is no small diesel engine Diesel engine at work in the small throttle automatically turn off. At this time in the parked state, put down the decompression rod, rocking the crankshaft, swinging when there is fuel injection sound, no fuel when slipping sound, under normal circumstances is the plunger wear. Slowly when the plunger Vice leakage serious, can not produce enough pressure to inject fuel injector, injector should be removed at this time appropriate to reduce injector pressure, the engine speed at low speed, the temporary fuel injection can be normal .