First, the throttle is unstable.
Unstable idling speed of excavators is usually caused by excessive mixture concentration or thinning, incomplete ignition or incorrect sensor signals of excavator accessories.
1. Check the pressure of each cylinder. If the cylinder pressure is uneven, idle speed will be unstable.
2. Check whether the fuel pressure is stable, whether the injection quantity of the injector of the excavator fittings is consistent, and the damage of the injector (such as plugging or leakage).
3. Check the pressure sense device of the excavator accessories. If the supercharged pressure sensor fails, it can not feed back to the engine ECU normal signal, can not play a role in correcting the fuel injection, in idle speed to supply the engine too thick or too thin mixture, causing idle instability.
Two, throttle no response:
1, first manual filling door, such as manual pump oil can be accelerated, can eliminate the problem of hand oil pump.
Excavator fittings hand oil pump
2. Check whether the oil circuit is blocked, whether the firewood filter is blocked or dirty, if there is no abnormality above, it is necessary to consider whether the high-pressure common rail is faulty.
3, check whether the throttle motor line of excavator is iron or motor itself fault.
Three, has been in the throttle state:
As soon as the excavator starts up, the engine speed remains unchanged after the throttle drops down. The reason may be that the low-pressure sensor of some excavator accessory works abnormally, which causes the program to misjudge the machine is in working state, so the phenomenon that a start-up is high throttle appears. In addition, if there is no change in the speed after the throttle down, the speed sensor may be abnormal.
Four. Engine throttle is abnormal.
Abnormal throttle is very important for excavator operation, such as throttle abnormality will not only affect work efficiency, serious will lead to flameout phenomenon. Generally speaking, there are three main kinds of abnormal throttle of Jiangsu excavator accessories. They are always high throttle, can not add throttle, throttle is big or small.
This article is supported by the Extended Arm Excavator. For more details, please click on our official website http://www.rbaras.com and we will provide you with satisfactory service wholeheartedly.