1. The main reason why diesel engines emit black smoke is due to incomplete fuel conversion rate. Besides the structural design of the equipment itself, it may also be due to some details that the operator did not notice. . The specific reasons are as follows:
(1) The fuel tank of the diesel engine is not sealed and is in contact with air for a long time, causing some impurities and dust to be dispersed suspended in the air. Fall into the air filter. The air inlet is blocked, resulting in a lack of air for internal combustion, resulting in incomplete combustion.
(2) The fuel quality is poor, causing the oil pipe passages inside the fuel tank to be blocked, resulting in insufficient fuel supply. Poor fuel quality can also damage the fuel filter, detectdeteriorate the internal oil, causing black smoke, and in severe cases, damage the fuel system.
(3) The fuel system oil pipe. is due to the oil. Poor quality causes some impurities to adhere to the surface of the pipeline.
2. Solutions to black smoke from diesel engines
(1) Cleaning is recommended. be carried out frequently in harsh environments, and in an environment with relatively good air, you can clean it at intervals and replace the air filter regularly.
(2) Check the fuel system and replace the solenoid valve and fuel filter in time.
(3) Clean the oil pipe regularly and add two diesel additives to effectively improve black emissions; . Smoke situation.
Detailed information:
Operating principle of the generatordiesel generator
(1) The diesel generator drives the operation of the generator. In the cylinder, the clean air filtered by the air filter is fully mixed with the high pressure atomized diesel fuel injected by the injector. Under the upward pressure of the piston, the volume decreases and the temperature increases rapidly, reaching the ignition point of. diesel fuel.
(2) The diesel ignites, the gas mixture burns violently, and the volume expands rapidly, pushing the piston down, which is called "work". Each cylinder performs work in a certain order, and the thrust acting on the piston becomes the force that drives the crankshaft through the connecting rod, thereby causing the crankshaft to rotate.
(3) If the brushless synchronous alternator and the crankshaft of the diesel generator are installed coaxially, the rotation of the diesel generator can be used to drive the generator rotor using the pprinciple of “electromagnetic induction”. ', the generator The electromotive force induced by the output can generate current through the closed load loop.
References:
Baidu Encyclopedia-Diesel Engine
Why the diesel generator emits Is there black smoke?
There may be a component problem.
Solutions to black smoke emitted by the diesel engine at the very beginning of it include: replacing the air filter, replacing the solenoid valve, replacing the fuel filter, cleaning the oil circuit, replacement of damaged parts, addition of diesel additives, etc.
1. Replace the air filter: The most common problem is that too much dust and particles in the air causes dust and dirt to build up in the filter element.t, which increases the resistance to air intake, leading to insufficient resistance. air inlet. It is recommended to clean once every 5,000 km in areas with high air pollution and once every 10,000 km in areas with good air pollution.
2. Replace the solenoid valve: Poor diesel quality will cause the fuel injector to become clogged and worn, resulting in inaccurate fuel delivery. Replacing the solenoid valve may resolve this issue. It is recommended to focus on checking this area if the diesel quality is poor.
3. Replace the fuel filter: This is also due to the quality of the diesel. The gray and moisture present in diesel must be filtered before entering the cylinder. the use time exceeds the regulations or due to damage caused by quality problems, particles and moisture will enter into itns the engine for combustion with diesel and will damage the fuel system, especially the common rail system, making it impossible to build up high and insufficient pressure. injection atomization, which will cause black smoke.
4. Clean the oil system: Carbon deposits will block the oil system and cause poor oil supply. Some car owners reported that the black smoke problem was greatly alleviated after cleaning the oil line. Areas with poor diesel quality are recommended to try this solution. However, it is recommended to try diesel additives first.
5. Replace damaged parts: Long-term driving will cause parts to wear out and affect oil and gas supply. Since these defects appear relatively scattered, a 4S inspection is necessary to confirm the causedepth of the defect.
6. Add diesel additives: Adding it twice can effectively clean the oil system and reduce carbon deposits. This solution only concerns the situation where the oil circuit is not fluid due to the quality of the diesel. If the additive does not improve the black smoke situation, you must go to 4S for inspection.
The exhaust gas discharged from the diesel engine exhaust pipe contains engine oil and is sprayed at the same time. The reason is that the space between the piston ring and the oil ring is large. too big, making it difficult to start the engine.
Because the lubrication between the piston ring and the cylinder body relies on the high-speed rotation of the crank to spray engine oil between the cylinder body and the piston for lubrication, commonly called splash lubrication. Excess lubricating oil burstbumped on the cylinder wall is then scraped by the oil ring towards the oil pan.
However, because the space between the piston ring and the oil ring is too large, the lubricating oil splashed on the cylinder wall enters the cylinder and burns due to combustion incomplete, when the exhaust gases are. discharged from the exhaust pipe, blue smoke occurs when unburned black lubricating oil is ejected with the exhaust gas, which appears as black oil flowing from the exhaust port.
Troubleshooting method: Replace the piston ring and oil ring to ensure the standard clearance between the piston ring and oil ring.