Know what type of maintenance has been performed on your car and when. If it has been a long time, it is recommended to try it at a professional repair shop, then clean it and use a computer to check it. . If there is no problem, check the throttle valve again. If the angle is appropriate and there are carbon deposits, this can be detected by a computer, and the carbon deposits on the combustion chamber and the top of the piston can be cleaned. If there is no problem, clean the fuel injector. Otherwise, lower quality gasoline was added. Some Sinopec gas stations may be unreliable. Replace the fuel filter element. The next step is to check the fuel pump fuel sensor, as well as cleanliness and moisture issues. The fuel pump may stop working intermittently, but the possibility is very remote and it does notIt's not easy to check afterwards. the filter is dirty and part of the mesh is damaged. If it is clogged, the defect must be eliminated after thorough cleaning.
What are the wrong starting methods for diesel generators to avoid?
1. Going to the corresponding repair shop for repairs and engine oil replacement is the most common part of maintenance. Engine oil plays a role in Engine oil has functions such as engine lubrication, cooling, shock absorption and wear reduction. Engine oil has a shelf life, so it must be replaced regularly. Different types of engine oil currently have different replacement cycles. types of motor oil: full synthetic motor oil, semi-synthetic and mineral oils. Full synthetic motor oil has better high and low temperature types, and its price is alsont the highest of the three. The replacement cycle is usually 10,000 to 12,000 kilometers. The replacement interval for semi-synthetic engine oil is 8,000-10,000 kilometers. Mineral engine oil is usually replaced every 5,000 kilometers.
2. The engine has heavy carbon deposits.
The most common cause of car vibration is that the throttle valve is too dirty or the fuel injection nozzle has too many deposits of carbon. When there is too much carbon deposit inside the engine, the gasoline ejected from the cold start fuel injection head will be absorbed by the carbon deposit, making the cold start mixture too fluid, which will make it difficult to start. The only way is to wait until the gasoline is absorbed by the carbon deposits. When the car is saturated, it is easier to start the car. Once the car is started, the gasoline adsorbedon carbon deposits will be sucked into the cylinder by the engine vacuum. suction for combustion, which will also make the mixture richer. The engine's combustible mixture is sometimes thin and sometimes rich, resulting in vibration at idle.
3.. Ignition system problems
Check the operating conditions of the spark plugs, high voltage wires and ignition coils. Poor operating conditions of the ignition system and spark plugs can also be the cause. this type of failure.
4. The oil pressure is unstable
If you have cleaned the carbon deposits from the engine, washed the throttle, replaced the spark plug, etc., and still find that the body shakes when idling , it is recommended to check the fuel supply pressure and whether the manifold pressure sensor is normal. If the supply pressure of the oil pump is abnormal or if thehe manifold pressure sensor has an incorrect value or malfunction, it will cause vibration in the vehicle body.
1. When the diesel engine is running and there is insufficient engine oil, insufficient oil supply will cause insufficient oil supply to the surfaces of each friction pair, resulting in abnormal wear or burns. For this reason, it is necessary to ensure a sufficient quantity of engine oil before starting the diesel generator and during operation of the diesel engine, in order to avoid cylinder drafts and tile combustion failures due to lack of oil.
2. Emergency stop or sudden stop under load. However, immediately stop the diesel engine after unloading the load. After the generator stalls, the water circulation of the cooling system stops, the heat dissipation capacity is greatly reduced and the heated parts perfect their cooling, which can easily cause cylinder head and cylinder liner problems. the cylinder block and other parts overheat, produce cracks, or cause the piston to overheat. Excessive expansion stuck in cylinder liner. On the other hand, if the diesel generator is stopped without idling to cool, the friction surface will be insufficiently oily. When restarting the diesel engine, poor lubrication will worsen wear. Therefore, before stalling, the diesel generator must discharge the load, gradually reduce the speed and operate without load for a few minutes (it is necessary to operate without load for 3 minutes).
3. Run the diesel generator under load without preheating after a cold start. When the diesel generator starts after a cold start, due to the high viscosity and low fluidity of the oil, the oil pump haslime. lack of oil, and the friction surface of the machine is poorly lubricated due to lack of oil, causing rapid wear and even failures such as cylinder tearing and tile burning. Therefore, after the diesel engine is cooled and started, it must operate at idle speed to warm up when the standby oil temperature reaches more than 40°C (if used in winter, the water level of cooling reaches 60°C) before operating. charge ; the machine must be started in low gear and the motor must be in low gear each time. Drive in first gear for a certain mileage until the oil temperature is normal and the oil supply is sufficient, then you can switch to normal driving. .
4. If you press the accelerator hard after a cold start of the diesel engine, the speed of the diesel generator will increase sharply, resulting inwill cause violent wear of certain friction surfaces of the machine due to dry friction. In addition, when the throttle is hit, the force received by the piston, connecting rod and crankshaft changes significantly, causing violent impact and easily damaging the parts.
5. When you operate a diesel generator with insufficient cooling water or too high cooling water or engine oil temperatures, insufficient cooling water will reduce its cooling effect and the diesel engine will overheat because it cannot be cooled efficiently; cooling water, If the engine oil temperature is too high, it will also cause the diesel engine to overheat. At present, the cylinder head, cylinder liner, piston components and valves of the diesel generator are mainly subjected to large thermal loads, and their mechanical properties such asthe strength and toughness decrease sharply, which increases the deformation of parts, reduces the mounting clearance between parts and accelerates the wear of parts, in severe cases, cracks and machine parts may get stuck. Overheating of the diesel generator will also aggravate the combustion process of the diesel engine, causing the injector to operate abnormally, causing poor atomization and increased carbon deposits.