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Black smoke from the exhaust pipe means that the exhaust gas contains too much carbon particles, and there is only one possibility for this to happen, and that is incomplete fuel combustion. The reason for incomplete combustion is mainly due to the excessive concentration of fuel mixture and incomplete combustion
1. Check whether the air intake is insufficient, mainly to see whether the air filter is blocked and whether the air flow meter is damaged;
2. Check the working condition of the fuel injector to see if it is caused by the poor atomization effect of the fuel injector, and also pay attention to the fuel quality;
3. Lack of cylinder, that is, the engine has a cylinder that does not work or does not work well, check the working condition of each spark plug and ignition coil, whether the spark plug has not been replaced for a long time, this phenomenon is generally accompanied by the violent shaking of the engine and insufficient power, and it is also a relatively common failure;
4. Check the cylinder pressure, whether there is air leakage, whether there is too much carbon deposition in the valve or combustion chamber, etc.;
5. Check the ignition timing, check the gas distribution timing, and see if there is any deviation in the timing, such as in advance or later, and it is better to go to the relevant maintenance station for inspection when you find this step.
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The exhaust pipe exhaust black smoke is related to the amount of fuel injected by the car, and this phenomenon generally occurs more on carburetor cars, because the fuel injection volume of carburetor cars is not controlled by computers like other models but controlled by the foot throttle, and the foot throttle is not accurate enough compared to the computer control.
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The engine burns incompletely! There are mechanical reasons, such as: low cylinder pressure, poor closure of cylinder head, etc. There are also electrical systems, such as: high-voltage line leakage, air flow meter failure, fuel pressure regulator malfunction, etc.!
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1. Gasoline is not completely combusted, it needs to maintain a certain mixing ratio with air, ideally, if the air is a little more, that is, a little thinner, it can also be completely burned, but there will be other adverse effects. However, if there is less air coming in, that is, it is a little thicker, it will cause incomplete combustion, produce carbon particle analysis, and make people see black smoke. Therefore, the first time to check whether the air filter is dirty, or the air intake pipeline is not smooth, and the air flow meter and other devices are broken.
2. There is a problem with the quality of the gasoline added, if you have been refueling at a large gas station, the car has been normal, and one day you have changed to a small gas station to refuel, and found this problem, this situation indicates that the oil quality is not good and the combustion is not sufficient, and the problem can be solved by changing back to good oil. 3. The nozzle is an accessory that directly controls the amount of oil, if the nozzle is blocked, or the oil pump and sensor are problematic, or the oil atomization is not good, these can cause the proportion of oil and gas mixture to be abnormal, such as sometimes thick, sometimes thin, some places are thick, some places are thin, and eventually it will cause unsatisfactory combustion and produce black smoke. 4. The ignition system is abnormal, such as the ignition angle is wrong, resulting in unsatisfactory combustion, or the spark plug is ablated, and the side is jumping, which affects the combustion time and combustion effect and leads to the poor working of a cylinder, or the leakage of the high-voltage bag causes similar problems.
5. The oxygen sensor is broken, because the ECU will also adjust the concentration of fuel injection according to the signal of oxygen sensing to match the air-fuel ratio, which will cause inaccurate fuel injection concentration and unreasonable combustion. 6. There is a lot of carbon accumulation in the throttle or cylinder, and the carbon deposit will adsorb some gasoline on the top and release it from time to time, which will interfere with the control of the mixing ratio and cause incomplete combustion. 7. Internal problems of the engine, such as deviation in the timing of the valve mechanism, insufficient cylinder pressure, and air leakage.
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We often encounter smoke from the exhaust pipe when driving on the road, and some novice drivers don't understand, so it's easy to be at a loss, thinking that the car is out of order. Although smoke needs to be paid attention to, but also score the situation, different colors of smoke represent different symptoms, see if you all understand?
The most common exhaust colors are white, blue and black.
First of all, the white exhaust gas, which means that the engine fuel is fully combusted, and the white smoke will disappear quickly, sometimes accompanied by water droplets, which proves that the engine is healthy and normal. Because the combustible mixture enters the engine cylinder and burns, it will produce carbon dioxide and water, and finally condense into liquid water through the three-way catalytic converter, muffler and exhaust pipe, so sometimes the exhaust pipe will drip water. When the temperature is relatively low, such as winter, due to the physical effect, the exhaust pipe will appear "white smoke".
White smoke from the exhaust during cold starting, and the white smoke disappears after the engine warms up, it should be regarded as normal, if the vehicle emits a large amount of white smoke during normal operation, it is necessary to go to the repair shop to replace the gasket. That may be because the cylinder head is not tightly sealed, and a large amount of engine heat flows out, which makes the exhaust pipe temperature too high, and the water and carbon dioxide in the exhaust do not condense into water droplets and are directly discharged.
Secondly, for the exhaust pipe that emits blue smoke, there is basically a situation of burning engine oil, which may be due to the excessive gap between the spark plug and the cylinder, the aging of the oil seal, and so on. It is recommended to check whether the engine cylinder seal is damaged, and change the oil with higher viscosity, otherwise it will weaken the power, increase fuel consumption and even pull the cylinder for a long time.
Finally, it is the most important one to pay attention to, that is, black smoke from the exhaust pipe, like tractor smoke, which is generally due to insufficient combustion of gasoline, resulting in carbon accumulation in the engine. If the engine shakes severely, the exhaust pipe not only emits black smoke but also makes abnormal sounds, and the acceleration is weak. Then we need to go to the repair shop to check the spark plugs, oxygen sensors and air flow meter lamps to troubleshoot.
Therefore, don't worry too much about the smoke coming from the exhaust pipe, repair it in time, and slowly troubleshoot the problem.
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Answer; Normally, this is determined by the characteristics of the Cadillac ATS turbine engine, and the high proportion of oil and gas mixture in the cold car state leads to the production of black smoke due to insufficient combustion. The time is very short, no more than 15 seconds. Reason:
operating characteristics of a supercharged engine; The cylinder volume is constant, and the ratio of oil and gas mixture has a fixed standard, when ensuring that the engine works normally when the turbine starts, and the supercharged engine is single.
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Generally, it is because the fuel combustion is incomplete and the mixture is too thick; The reasons may be overload of the car engine, insufficient cylinder pressure, low engine temperature, improper adjustment of the carburetor, clogged air cleaners, individual cylinders not working and ignition too late, etc.
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Black smoke from the exhaust pipe. There are two possibilities, one is that the engine burns oil, and the other is that there is too much carbon deposit.
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This may be caused by too much carbon deposit, or it may be burning engine oil.
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Judgment of black smoke and white smoke failure of automobile exhaust pipe 1. Black smoke from the car: The mixture is too thick Fault phenomenon: The engine exhaust pipe emits black smoke when the car is driving, and the exhaust pipe has abnormal noise.
Cause of failure: 1. The ignition timing is inaccurate, which will also make the mixture incomplete; Or if a few cylinders of the engine do not work, there will also be a small amount of black smoke discharged. 2. The mixture is too concentrated, that is, the excess air coefficient of the mixture in the cylinder is too small, the combustion is incomplete, and part of the fuel is decomposed into free carbon at high temperature and discharged from the exhaust pipe, resulting in black smoke.
Troubleshooting: 1. If a small amount of black smoke is discharged from the engine exhaust pipe, accompanied by a rhythmic "abrupt" sound, it can be concluded that a small number of cylinders do not work or the ignition timing is inaccurate. You can use the cylinder-by-cylinder disconnection method to find out the non-working cylinder, or check and correct the ignition timing.
2. If a large amount of black smoke is discharged from the engine exhaust pipe, accompanied by the sound of firing guns, it can be concluded that the mixture is too thick. Check whether the choke is fully opened in time, and carry out high-speed maintenance if necessary; After the flameout, look at the main nozzle from the carburetor mouth, if there is oil injection or oil dripping, the oil level of the float chamber is too high, it should be adjusted to the specified range, and the main measuring hole should be tightened or replaced; The air filter is clogged and should be cleaned or replaced. Second, the car emits white smoke:
Fault phenomenon: A large amount of white smoke is emitted from the engine exhaust pipe when the car is driving. One is milky white, the other is water vapor white smoke, and there are water droplets at the exhaust pipe mouth.
Cause of failure: When the engine is running, a large amount of white smoke is discharged from the exhaust pipe, and there are two situations: 1. The exhaust pipe discharges milky white oil mist.
The main reason is that the fuel is not vaporized well, and it is discharged from the exhaust pipe without combustion, resulting in milky white smoke. It is more common in winter when the engine is starting because of the low temperature and poor fuel atomization. It usually disappears after the engine is started as the engine temperature increases.
2. A large amount of water vapor and white smoke is discharged from the exhaust pipe, and there are water droplets at the exhaust pipe mouth. The main reason is that the cooling water enters the cylinder or the water vapor formed by the gasoline containing water. Troubleshooting:
1. When the engine is running, the exhaust pipe discharges a large amount of water vapor and white smoke, and it is necessary to check whether there is water in the fuel tank, check whether the cylinder gasket is damaged, whether the cylinder block has cracks, and whether the cylinder liner sealing ring is good. 2. When a car parked in winter or rainy season starts for the first time, white smoke can often be seen. It doesn't matter, as soon as the engine temperature rises, the white smoke disappears and this condition does not need to be repaired.
If the exhaust pipe becomes black smoke after the engine temperature rises, it indicates that the cylinder pressure is too low or individual cylinders are not working, which should be checked and eliminated. If mine is helpful to you, remember to light it up, thank you!
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1. Causes of black smoke.
1.The flammable mixture is too thick. 2.
There is too much oil in the engine fuel. 3.Poor piston ring or crankshaft oil seal sealing.
4.There is moisture in the fuel. 5.
Bad spark plug 6The air filter is too dirty.
2. Fault diagnosis and elimination.
1.For the inspection and diagnosis of excessive concentration of combustible mixtures, the carburetor and air filter should be checked.
2.The blend does not compare with the blend of the oil, or the wrong grade of oil is used. If the oil mixture contains too much oil or the oil quality is poor, the oil of the flammable mixture cannot be completely burned, resulting in black smoke.
The above phenomenon can also occur in two-stroke engines with separate lubrication and oil pump misalignment and excessive oil supply. At this time, the oil pump should be checked and adjusted according to the regulations to ensure that the lubricating oil is supplied proportionally at different throttle openings.
3.Excessive wear or breakage in a four-stroke engine, as well as too much oil in the crankcase, can cause oil to string into the combustion chamber and cause excessive oil in the mixture. If the crankshaft oil seal of a two-stroke engine is broken, it will also cause the oil from the transmission to string into the crankcase and enter the combustion chamber with the mixture.
4.One of the reasons for the mixing of water in the fuel is that the fuel in the fuel tank itself contains water, so the fuel tank should be cleaned and the fuel should be replaced. Another reason is that the cylinder gasket of the water-cooled engine is broken, and cold water enters the cylinder.
If, in the absence of leakage, the water in the tank is consumed too quickly, and the exhaust smoke from the exhaust pipe is slightly white, this is mostly the reason and the head gasket should be replaced.
Black smoke from gasoline engines is rare, black smoke is mainly not completely burned fuel in the combustion chamber, in the case of high temperature and lack of oxygen, diesel can not be completely and fully combusted, so decomposition and aggregation to form soot, it is a small diameter of the aggregate.
Because this aggregate reacts much slower than gasified fuel, due to the high temperature and anoxic environment of the combustion chamber, it cannot be fully burned again and is discharged through the exhaust pipe, so black smoke is presented.
The direct consequence of this phenomenon is that the fuel consumption of diesel engines is very high, the power is reduced, and at the same time, a large amount of carbon deposits exist in the piston and piston ring valves. In severe cases, the piston rings will be jammed, the valve seal is not tight, and the air leakage will be accelerated, and at the same time, it will also accelerate the wear of parts, thereby reducing the service life of the engine, so this aspect should be paid special attention.
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The black smoke from the exhaust pipe is mainly caused by the combustible mixture being too thick, the spark plug working poorly, and the ignition being too late. Troubleshooting:
1. If the air filter is blocked by dirt, the filter can be cleaned and replaced (the air filter of the paper filter element is generally better to replace the filter element.) If it is a foam filter, the filter should be cleaned in kerosene or non-flammable detergent, and after drying, a small amount of lubricating oil should be applied to its surface, and the filter wall should be cleaned before the filter element is replaced);
2. If the carburetor is faulty or improperly adjusted (such as compensating for the blockage of the air channel or idle air channel, insufficient air intake; The main volume hole is seriously worn, which increases the amount of fuel injected into the main nozzle, resulting in incomplete combustion; The automatic valve for starting heating is in the open position, and the concentration valve cannot be automatically closed, resulting in over-concentration of mixed gas, etc.); The oil level of the float chamber is too high, and part of the fuel directly enters the cylinder without atomization, resulting in incomplete combustion. The way to check the height of the float is to turn the carburetor upside down, disassemble the float chamber so that the float tongue presses the float needle valve, and measure the distance from the joint surface of the float chamber to the top of the float (that is, the height of the float), and the left and right sides should be the same. If it is not suitable, the float can be disassembled, and the float tongue can be adjusted by pulling the float tongue with needle-nose pliers;
3. If the muffler is clogged, the exhaust is not smooth, and the exhaust gas is trapped in the cylinder, so that the fresh air is not sufficient and the combustion is insufficient, the muffler should be removed.
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If you pay attention, you will often find that there are many cars on the street with "abrupt" black smoke from the exhaust pipes, which is obviously burning gasoline, why is there still black smoke? What's going on here?
There are two classifications of general car faults, one is "false fault", the other is "real fault", "false fault" refers to some faults of the car false alarm, in fact, the car itself is not problematic, and "real fault" means that the car is really out of order. If there is black smoke coming out of the exhaust pipe, it can be judged as a "true fault".
The phenomenon of black smoke emitting from the exhaust pipe of the car appears more in diesel cars, and there are many similarities between diesel cars and gasoline vehicles, but we mainly talk about gasoline vehicles here.
The cause of black smoke from the exhaust pipe
Black smoke from the exhaust pipe indicates that the engine is not burning well, and this involves the work of various systems of the engine. The most direct reason is that the engine mixer is too concentrated and the combustion is not sufficient. The possible reasons are as follows:
1. Engine overload, that is, "small horse-drawn cart", such as excessive load of the car, low gear and high speed of the engine, and the use of large electrical equipment on the car.
2. If the cylinder pressure is insufficient, there may be air leakage, such as piston ring misalignment, valve valve inaccuracy, etc.
3. If the individual cylinder does not work (lack of cylinder) or ignition is too late, it may be the fault of the spark plug or the problem of ignition advance angle control.
4. The air filter is blocked, resulting in insufficient air intake and over-concentration of the mixer, but the possibility is small.
5. The exhaust system is blocked, and the exhaust resistance increases, which may be due to excessive carbon accumulation in the muffler.
6. If the oxygen sensor fails, the oxygen sensor is installed in the exhaust pipe, and the air-fuel ratio of the engine is fed back by detecting the oxygen content of the exhaust gas to control the concentration of the mixer.
7. The injection pressure of the fuel injector is too low, and the atomization effect is not good.
8. The fuel oil is too poor.
9. The engine temperature is too low, and the water temperature cannot rise. It could be a malfunction of the thermostat.
The above is actually just some of the more common possibilities, after all, the engine. Each system is also composed of a large number of components, and the reasons cannot be generalized, and the specific reasons should be combined with the actual situation.
Black smoke from the exhaust pipe cannot be ignored
The exhaust pipe emits black smoke, many people are accustomed to not paying much attention to it, thinking that it is just burning more oil, in fact, it is not, but where the vehicle emits black smoke, it will inevitably produce a large amount of carbon deposition and fuel consumption for a long time, and will aggravate the wear and tear between the parts, greatly shorten the service life of the engine, and it is also a very fatal thing.
The black smoke of the engine is often accompanied by problems such as the decline of engine power and economic performance, which also has a significant impact on driving comfort. And the exhaust emissions are not up to standard, and even the car inspection can't pass. Therefore, if there is black smoke from the engine, it should also be checked and repaired as soon as possible to avoid more serious consequences.
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This should be caused by the engine control unit, caused by the mixture being too thick or by the oxygen sensor problem, I hope mine is helpful to you.