When the diesel engine set cannot start normally, the reasons should be found from the aspects of starting work, diesel fuel supply system and compression. Today to share the diesel generator start failure, can not start normally what are the reasons? The normal operation of the diesel generator set must first atomized diesel can be accurately and timely injected into the combustion chamber, and the compressed air in the combustion chamber,the diesel engine has a high enough speed when starting ans a certain temperature in the cylinder.
1.The ambient temperature is too low. Before starting the diesel generator set, the diesel engine should be preheated, otherwise it is not easy to start.
2. The starting speed is low, for the hand-started diesel engine, the speed should be gradually increased, and then the decompression handle is pulled to the non-decompression position, so that there is normal compression in the cylinder. If the pressure relief mechanism is not adjusted properly or the valve is against the piston, it is often difficult to swing the car. It is characterized by the crankshaft turning to a certain part of the rotation can not move, but can be returned. At this time, in addition to checking the decompression mechanism, you should also check whether the timing gear meshing relationship is wrong. For diesel engine using electric starters, if the starting speed is extremely slow, most of the starter is weak, which does not mean that the diesel engine itself is faulty. The electrical wiring should be inspected in detail to determine whether the battery is fully charged, whether the wire connection is tight and whether the starter works normally.
3. Check whether the battery voltage reaches the rated voltage of 24V, because when the generator is usually in the automatic state, the electronic control module ECM monitors the status of the entire unit and the contact between the EMCP control panel is maintained by the battery power supply. When the external battery charger fails, the battery power cannot be replenished and the voltage drops. Charge the battery. The charging time depends on the discharge of the battery and the rated current of the charger. It is recommended to replace the battery in an emergency.
4. Check whether the battery terminal post is in poor contact with the connecting cable. If the battery electrolyte is added too much during normal maintenance, it is easy to overflow the battery surface corrosion terminal post, which increases the contact resistance and makes the cable connection poor. In this case, sandpaper can be used to polish the terminal and the corrosion layer of the cable joint, and then re-tighten the screw to fully contact it.
5. Whether the positive and negative cables of the starting motor are not well connected, which causes vibration when the generator is running and loosens the wiring, resulting in poor contact. The probability of starting motor failure is less, but it cannot be ruled out. To judge the action of the starting motor, you can touch the shell of the starting motor by hand at the moment of starting the engine. If the starting motor is inactive and the shell is cold, it indicates that the motor is not moving. Or the starting motor is seriously hot, there is a stimulating burnt taste, the motor coil has been burned. It takes a long time to repair the motor.
6. There is air in the fuel system, which is a more common failure, usually caused by improper handling of the fuel filter element when replacing it. After the air enters the pipeline with the fuel, the fuel content in the pipeline is reduced, and the pressure is reduced, resulting in the engine failing to start. In this case, perform exhaust treatment.
Post time: Oct-16-2024