The speed of the engine is out of control and suddenly increased, commonly known as “speed”, exceeding the maximum allowable speed, accompanied by loud noise. Engine “speed”, if not promptly take measures to control, in a short period of time can lead to engine damage, or even personal injury, causing irreparable damage.
The reason why the engine produces “speed”, is due to the rotation of the plunger is out of control, stranded in the larger or maximum throttle position, engine speed or because the load is reduced, so that each cycle fuel injection quantity with the plunger movement speed increased, the injection quantity increased to speed increased further, such a vicious spiral, until more than the maximum allowed speed to reach the point of no control. Specific reasons are as follows:
Oil regulating rod (i.e. rack) stuck in a certain position.
The oil quantity adjusting pull rod is connected with the governor connecting rod.
Governor spring break card.
The fly hammer connecting pin is stuck or broken out.
Governor flying hammer.
The governor sleeve sliding shaft and rust or foreign bodies stuck.
The fuel injection pump and governor loose.
The governor of the oil viscosity is too large, the flying hammer to open.
To the governor of thrust disc axial sliding blocked.
The governor of the flying hammer bracket and the sliding guide plate is blocked.
The emergency measures of the engine produces “speed”, according to the specific circumstances at the time, quickly try to force the engine flameout, there are several specific methods:
The immediately open Baotou beiben parts exhaust brake button on the engine exhaust braking action, stop cylinder exhaust, forced deceleration; pull flameout pull, forced oil amount regulating rod (or toothed bar) to reduce the oil moves off the oil;
Baotou North heavy truck parts transmission into the high speed gear, stepping on the brake pedal, slow loose clutch pedal, so that the engine with load forced flameout.
Block the air inlet to prevent air from entering the cylinder.
Release the high pressure oil pipe joint, not make the fuel into the cylinder.
Release the low pressure oil inlet joint of the injection pump and disconnect the low pressure oil chamber.
The diagnosis and treatment of once the engine “speed”, should be in place to take emergency measures corresponding to the engine flameout, and troubleshooting.
The cold start after the engine produces “speed”, lift the throttle, speed is still high, should pull the pull button to stall stall. First of all, the governor should check whether the oil is too viscous, causing the fly hammer is not easy to open, lose the function of adjusting speed.
The car is parked long after starting the “speed”, should open the windows cover or the injection pump injection pump front oil regulating rod (rack) end protective cap, hand moving rod, observe whether flexible, if Sezhi, that rod (rod tooth) and the set of corrosion, or lubrication is not good, should be rust lubrication.
If the North Baotou heavy duty truck parts pump is in the disassembly and maintenance of the car after the emergence of the “speed”, you need to check the pull rod (rod) is due to poor storage caused by bending deformation. If so, it should be removed to correct or replace new pieces.
When the pull rod (rod) is checked, if the rod is free to move, it can not move forward automatically, which means that the connecting rod is connected with the governor.
If the above checks are normal, the fault in the governor, the governor should open the rear cover, complete decomposition check. After the completion of the maintenance test bench should be tested, no doubt after loading.