The diesel generator set can t start, how to deal with it?

Reasons why the diesel generator set cannot be started: no fuel or insufficient fuel volume; Low engine cylinder cooling temperature; The battery voltage is low; The jet oil pump has air; starter motor failure; Control loop failure. (FYI:.)

Yanan diesel generator solution: 4000-080-999).

Here's how to fix it:

1. Circuits:

1. Successfully connected to the diagnostic instrument, it means that the ECU of the engine has been powered on. Read the fault code, and there is no fault code display.

2. Start the engine, detect the synchronization signal as 1 (1 means synchronization, 0 means out of sync), the engine crankshaft, camshaft sensor signal synchronization. It was preliminarily determined that the non-synchronous signal could not be started.

3. Check that the water temperature, fuel temperature, and intake air temperature values are normal, indicating that the engine has not entered the operation mode of thermal protection, and the above inspection has basically excluded the engine circuit. If the diagnostic instrument cannot be connected when the key is opened, and the ECU is not powered when the ECU is started, you should check the main relay that sends power to the ECU of the engine as follows and check the relay power transmission.

Second, the oil circuit:

1. Check the low-pressure oil circuit. There is no discount in the oil pipe, there is no air in the oil circuit, the hand oil pump is not suctioned when starting, and the relief valve is in good condition. The fine filtration and coarse filtration have been replaced to eliminate the problem of low-pressure oil circuit.

2. Check the high-pressure oil circuit, loosen the high-pressure oil pipe and the injector connecting nut with a wrench, and the pump hand oil pump should have no air (bubbles coming out) as normal.

3. Check the amount of fuel injected. The actual fuel injection was higher than normal, but the engine still wouldn't start.

Note: Each cylinder works in a certain order, and the thrust acting on the piston becomes the force that pushes the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate. Using the principle of 'electromagnetic induction', the generator outputs an induced electromotive force, which generates an electric current through a closed load loop.

A range of diesel engine and generator controls, protection devices and circuits are also required for a usable, stable power output.

Diesel engine, the motor unit can't start, you have to go to the place where these things are specially repaired to have a look, or you can see if there is oil yourself?

The diesel generator set cannot be started, and the reason can be found from the following aspects:

1.A large amount of diesel fuel is accumulated in the combustion chamber of the diesel generator set, which makes it difficult to start.

2.The unit has a short warm-up time and a low temperature, resulting in only gray and white smoke emitting when the unit starts, but not catching fire.

3.Air is mixed in with the diesel generator set's fuel tank to the injector's oil circuit.

4.The unit has poor fuel injection atomization or the fuel injector does not inject oil, resulting in a start-up failure.

5.If the oil supply advance angle of the unit is too large or too small, it will affect the normal start of the unit.

6.The time controller of the diesel generator set is faulty, or the electronic control unit is faulty.

If you encounter difficulties in starting the unit or fail to start it, you can refer to the above 6 ideas to check the unit, find out the cause, and eliminate the fault.

Diesel generator set starting difficulty troubleshooting:

1. The starting difficulty caused by the diesel fuel does not have the intake cylinder.

The diesel engine is driven by the starter and runs at a normal speed, but the diesel engine cannot start, and there is no burst sound, and there is no diesel smell and smoke discharge from the exhaust pipe nozzle, which indicates that the diesel fuel has not entered the cylinder, and the reasons for this are:

There is no oil in the fuel tank, the fuel tank switch is not turned on or the flame-out knob is not returned;

The fuel supply rod of the fuel injection pump is stuck, there is air in the oil circuit, the filter is blocked, and the hose in the oil circuit is twisted and bent.

If the filter screen of the oil inlet of the oil pump is blocked, the water in the oil circuit leads to freezing in winter and the diesel grade is wrong, such as using summer oil in winter, the diesel will condense and precipitate paraffin, and block the oil circuit;

The injector needle valve is stuck and does not inject oil, the driving gear of the fuel injection pump is damaged, and the keyway or semi-circular key of the fuel injection pump camshaft is damaged.

Second, the diesel has entered the cylinder but it is still difficult to start.

Driven by the start click, the diesel engine can hear an intermittent burst sound, and the exhaust pipe mouth has diesel smell, white smoke or a small amount of black smoke discharged, which means that the diesel has entered the cylinder. If you still can't start or have difficulty starting at this point, it could be:

The fixing bolt between the coupling driving disc and the active soil element is loose, resulting in too late oil supply time;

The spring of the low-pressure oil circuit return valve is too soft or damaged, resulting in too low oil supply pressure, and the oil injection pump outlet valve or plunger pair is not sealed, resulting in too small fuel injection

The injector needle valve is worn or the pressure regulating spring is damaged, which makes the quality of diesel spray worse, and the diesel contains water, which makes the diesel not easy to burn, and the air filter is blocked, resulting in insufficient air intake;

The exhaust brake valve is not opened, so that the exhaust is not smooth, resulting in exhaust exhaust;

Improper valve clearance adjustment or ablation, piston rings and cylinder liner wear, injector and seat hole fixation, cylinder head bolt loosening, etc.

Serial number 1, the generator set is difficult to start or does not start the reason: elimination method: 1, the battery power is insufficient 2, the battery line and plug are loose.

3. The intermediate relay fails. 4. The intermediate relay fails 5. The oil supply system is not smooth; No oil supply. 6. The contact between the start button and the start loop is poor.

1. Check the battery charge. 2. Check and tighten the battery cord and plug. 3. Check whether the intermediate relay operates normally.

4. Overhaul the starter. 5. Drain the air in the fuel system, dredge the pipeline to make the fuel unblocked, overhaul the oil pump, and clean the primary fuel filter. 6. Replace the button and check the starting circuit.

2. Reasons for the difficulty of engine rotation: rule out the reverse method: 1. No oil is sprayed out of the fuel injector (poor oil supply).

2. Air seeps into the fuel system. 3. The fuel injection time of the fuel injection pump is inaccurate or the fuel injection pump is faulty. 4. The position of the governor operating handle is wrong.

5. Circuit faults of ESC boards, actuators, speed sensors, etc. 1. Check whether there is air leakage or blockage in the oil circuit between the oil tank and the oil pump. 2. Open the exhaust screw to check the oil output.

3. Readjust the time of the fuel injection pump. 4. When starting, put the governor handle in the no-load position. 5. Check the corresponding equipment and circuits respectively.

3. Stop after starting, easy to ignite Causes: Elimination method: 1. Poor oil circuit, filter blockage, and oil pump failure.

2. The air filter is seriously blocked. 3. Fuel injector failure. 4. The automatic protection function sets the parameter offset.

5. The direct current of the automation unit is interrupted. 6. Circuit faults such as ESC boards, actuators, and speed sensors. 1. Check the smooth flow of the oil circuit, and replace the diesel filter if necessary.

2. Check the condition of the air filter. 3. Replace the nozzle. 4. Reset the parameters.

5. Check whether the battery voltage or power is sufficient. 6. Check the corresponding equipment and circuits.

1. No fuel or insufficient fuel volume;

2. The engine cylinder is cold but the water temperature is low;

3. The voltage of the storage tank is low;

4. The injection oil pump has air;

5. Failure of starting motor;

6. Control loop failure.

Cause of failure: The battery voltage is too low or the battery capacity is insufficient; The control start loop is not supplied normally; The starting relay is not working; The starter motor is not working.

Troubleshooting: Check the battery voltage, the voltage is 12V, 24V when it is not started, and the battery voltage during the startup process (12V system shall not be lower than 9V; 24V system shall not be less than 18V); Check whether the DC power supply circuit fuse or switch is closed, make sure.

The power supply of the control loop is normal; Check the starting relay to confirm that it can work properly when it gets a working power supply; Check the starter motor to see if it is working properly when it is powered up.

It seems that this question is asked to the right person, yes, the expert will answer your question, two words: pay: you can't start it if you want to, don't thank me, I am me, different flowers, thank you.

The prerequisite for the normal operation of the diesel generator set is that the well-atomized diesel can be burned in the chamber accurately and timely, and the compressed air in the combustion chamber can only catch fire and explode when it reaches the temperature of the motherland. To meet these two conditions, it is necessary to have a high enough speed and make the cylinder with a certain temperature when the diesel engine starts, when the diesel generator set can not start, the reason should be found from the starting work, diesel engine fuel supply system and compression, etc., from the following aspects of consulting to consider the problem, so as to solve the essence of the problem, in addition to the starting speed of a machine will also lead to the occurrence of the whole problem, the starting speed is low, for the diesel engine of the hand crank, the speed should be gradually increased, Then pull the pressure reducing handle to the non-decompression position, so that the cylinder has normal compression, if the pressure reducing mechanism is not properly adjusted or the valve is against the piston, it often feels that the rocking car is very laborious, and its characteristic is that the crankshaft turns to a certain part and cannot rotate, but can be returned.

At this point, in addition to checking the decompression mechanism, you should also check whether the timing gear engagement relationship is wrong. For the diesel engine using the electric starter, if the starting speed is extremely slow, most of the starter is weak, which does not mean that the diesel engine itself is faulty. A detailed inspection of the electrical wiring should be carried out to determine whether the battery is sufficiently charged, whether the wires are connected tightly and whether the starter is working normally.

Once the circuitry of the starting system has been tested and proven to be faultless, it is time to focus on why the Cummins diesel generator engine is not running. Generally speaking, the ignition system of the engine is tested first, which is also the easiest inspection job. In early ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal.

When choosing a spark detector, an adjustable detector is preferable to a fixed design, as it allows you to adjust the detector to a smaller gap so you can tell if there is no spark at all, or if there is a spark but it is weak. For Cummins diesel generator set engine failure to start this kind of fault, the first work to do is to test the circuit in the engine starting system.

From the perspective of the most basic composition, the circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these parts. Of course, in addition to this, ignition switches, starter relays or solenoid coils, as well as in-vehicle anti-theft systems, are also important components of the starting system.

For the diagnosis of such faults that the Cummins diesel generator set engine cannot start, the battery should be tested first. It is necessary to find out if the engine does not start because the battery is insufficient.

The first is electricity: batteries, electric motors.

The second is oil: a line valve or a leak.

The third is the ambient temperature: the temperature is too low, and there is no preheating device, the diesel engine is difficult to start.

Diesel is a light petroleum product, a mixture of complex hydrocarbons (the number of carbon atoms is about 10 22). Diesel fuel. It is mainly composed of diesel fractions produced by distillation, catalytic cracking, thermal cracking, hydrocracking, petroleum coking and other processes; It can also be produced from shale oil processing and coal liquefaction.

It is divided into two categories: light diesel oil (boiling point range of about 180 370) and heavy diesel oil (boiling point range of about 350 410). It is widely used in large vehicles, railway locomotives, and ships.

The most important use of diesel is in diesel engines for vehicles and ships. Compared to gasoline, diesel has a high energy density and a low fuel consumption rate. Diesel has low energy consumption, so some small cars and even high-performance cars have switched to diesel.

On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) released a preliminary list of carcinogens, and diesel fuel and light fractions were in the list of three types of carcinogens.

1. Whether the voltage of the battery reaches the rated voltage DC24V or 48V, etc. If the battery fails, the voltage will drop if the power is not replenished, so it is recommended to replace the battery in an emergency.

2. Whether the battery binding post and the connecting cable are in poor contact. In this case, you can polish the broken parts of the binding posts and cable joints, remove the re-fastening screw contact, and then contact.

3. There is air entering the fuel part, and it needs to be exhausted out at this time (the diesel generator set needs a hand pressure pump for exhaust), and the oil pressure of the fuel transfer pump should reach 345kpa.

Fourth, the positive and negative cables of the motor are not firm, and the vibration of the diesel generator set is caused by the relaxation of the wiring during operation, if the motor shell is cold, it means that it is running, such as hot and burnt, it means that the motor is burned out, and the motor of the diesel generator set needs to be changed.

When we encounter a situation that cannot be started, we need to carry out reasonable repairs according to the specific reason, but the common problem solutions are as follows:

1. When encountering a fault caused by the fuel system, we can disassemble the engine and clean its interior to check whether the fuel pump is blocked, whether there is oil leakage or air leakage.

2. Inspect and regularly replace parts that are easy to wear.

3. In cold weather, the preheating start method should be adopted.