What causes diesel generators to have difficulty starting?

Causes of difficulties in starting diesel generators:

1. Circuit failure. Wrong line connection; poor contact; The battery capacity is insufficient.

2. Oil circuit reasons. There is air in the oil circuit; Blockage of oil circuits; Diesel filter clogging; The oil pump does not supply oil; The injector injection hole is blocked by carbon deposit; The injection pressure is too low; Improper operation.

3. The injection time is wrong.

4. The gas distribution phase is wrong.

5. The temperature is too low, so that the temperature at the end of compression is too low.

6. Poor compression. excessive wear of piston rings and cylinder liners; Poor valve sealing, air leakage; The oil is too bad and the seal is poor. As a result, the vacuum degree is low when the air is intake, the air intake is small, and the gas that has entered the cylinder during compression leaks a lot, resulting in low pressure and low temperature at the end of compression, so that the diesel fuel can not catch fire and burn.

The main reasons for the difficulty in starting diesel generators are as follows; First, the low-pressure oil circuit is faulty; the second is the failure of the oil pump; the third is the failure of the oil supply drive train; Fourth, the fuel injection pump is faulty; Fifth, the injector fails, etc., and the specific reasons are as follows: 1. The failure of the low-pressure oil circuit 1) There is no oil in the fuel tank or the oil level is too low, and the straw cannot absorb the oil. 2) The oil pipe is broken, the oil pipe joint is loose and leaking. 3

The difficulty of starting the diesel generator is a headache for the operator, especially in winter!

The following are the common causes and treatment suggestions that cause diesel generator starting difficulties, as follows, I hope to give some help:

1. If the starting battery voltage is insufficient, check the power, if it is not enough, charge or replace the battery;

2. Air intakes into the oil pipe, resulting in air resistance, so that the diesel fuel can not enter the fuel injection pump and the oil nozzle, and the oil is emptied with a manual oil pump, and the oil pipe or manual oil pump is replaced if necessary;

3. If the air filter is too dirty, check the air filter, and replace the new air filter element;

4. Poor atomization of the injector, resulting in the diesel oil can not be atomized, the diesel fuel can not be compressed and ignited, check and test the injector, if damaged, replace the injector parts or injector assembly;

5. The precision coupling parts of the high-pressure fuel unit are worn, resulting in the fuel injection pressure not reaching the fuel injection atomization value, check and test the fuel device, and replace the plunger and outlet valve couples or fuel injection pump assembly if damaged;

6. The wear gap of the piston of the cylinder liner of the diesel engine is too large, which leads to the reduction of the combustion compression ratio, and the diesel cannot be compressed.

a) Check the fuel system.

1.Too much gasoline in the combustion chamber of the engine, (stop for a few minutes and try to start again or remove the spark plug to wipe dry) 2There is not enough fuel in the tank, (add fuel to the tank).

3.The fuel filter is clogged, (cleaning the filter).

4.Carburetor clogged, (clean carburetor).

5.The air filter is dirty, (replace the thickening pump and the thickening pump pipe and filter element) 6Tubing bending, no oil (adjust length and direction).

7.The fuel type is wrong or there is water in the fuel, (replace the new fuel) 2) Ignition system.

1.Spark plug failure, (clean up the spark plug carbon deposit and adjust the spark plug gap) 2The ignition time is wrong (adjusting the valve and the ignition coil gap is too large or too small)3Faulty leakage of the flame-out switch (replacement switch).

4.The magnetic strength is not enough (replace the flywheel).

5.Ignition failure (replacement of igniter).

6.If the engine oil is not filled or the oil volume is insufficient, the oil alarm system will be triggered (added as required) 7The flame-out wire is grounded (adjusted).

c) Mechanical Failure:

1.Valve clearance is small (correct adjustment of intake and exhaust valves).

2.Cylinder gasket damage, (cylinder replacement).

3.Poor valve sealing (repair or replacement of valves).

4.Cylinders, pistons, piston rings wear (replace cylinders, pistons, piston rings) 5The semi-circular key of the flywheel is cut off, and the ignition time is abnormal (the crankshaft and flywheel are replaced).

The preheating time of the diesel generator set is shorter and the temperature is lower, resulting in only gray and white smoke emitting when the unit starts, but it does not catch fire. (The warm-up time must be longer, and it is resolutely not allowed to start without warm-up).

There is a lot of diesel fuel accumulation in the combustion chamber of the diesel generator set, which makes it difficult to start.

If the oil supply advance angle of the unit is not suitable, and the oil supply advance angle is too large or too small, it will affect the normal start of the unit. (Adjust the oil supply angle valve).

The oil circuit from the fuel tank to the injector of the diesel generator set is mixed with air. (Check whether the oil pipe is damaged, and check that the connection port is loose).

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

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

Generally, most of them are faults in the oil supply system, if it is an old-fashioned mechanical high-pressure pump, as long as the manual pump is used to exhaust the air and bring the diesel pump up, it can be started.

Twenty points of reason why the generator could not start.

1.The diesel generator set is stuck, and the manual cannot be turned aroundElimination method: Thoroughly inspect and find the cause.

2.Troubleshooting Severe Blockage of Fuel Filters: Replace the fuel filter regularly.

3.Serious blockage in the air intake system is ruled out: Replace the air filter regularly.

4.Some units (EFI) are too fast to power on, and the EFI controller has not passed the self-test elimination method: restart after resetting on the control screen (pause for 3-4s).

5.Troubleshooting method of shutdown solenoid valve: check and repair, replace if necessary.

6.Water removal method in fuel: replace the fuel, it is recommended to install an oil-water separator.

7.Air or no fuel removal method in the fuel system: The air is removed and the fuel flows out of the return line normally through a manual fuel pump.

8.Troubleshooting method of electronic speed control board: check whether it is powered on and replace it if necessary.

9.Troubleshooting method for starting relay: Replace this relay.

10.Troubleshooting method of starting motor: analyze the cause and replace it if necessary.

11.Fuel injection pump and fuel injector fault (blockage) troubleshooting method: ask authorized personnel to check the oil pump and analyze the cause, most of which are caused by long-term use of substandard fuel.

12.Insufficient preheating method before starting the diesel generator: check the preheating components.

13.Troubleshooting method for serious blockage of exhaust system: Check and drain the fault.

14.Elimination method of the unit in a low temperature state: the temperature of the body cannot be increased, so it is recommended to use the unit heater.

15.Troubleshooting method if the control screen is not powered on: Check whether the fuse on the control screen is blown.

16.Diesel generators use the wrong type or grade of fuel exclusion method: must be replaced.

17.The unit is in the plateau air thin condition exclusion method: it cannot be started at full speed at one time, and must be started at full speed after running at idle speed for a period of time.

18.Troubleshooting method of oil transfer pump: check and repair, replace if necessary.

19.Elimination method of insufficient capacity of the starting battery of the unit: maintain the battery (charging, replenishment) and replace this group of batteries if necessary.

20.How to eliminate the low starting throttle potentiometer of some ESC units: Refer to the manual of the random electronic governor and adjust the potentiometer appropriately.