What are the reasons for the unqualified exhaust of the car

There are generally 4 reasons for unqualified exhaust gas.

1) The mixture is too thick or too thin;

2) The spark plug gap is too large;

3) The atomization state and sealing condition of the fuel injector are not good;

4) The three-way catalytic converter and oxygen sensor failed, resulting in all the values in the emission not meeting the standard.

1. Exhaust gas emitted by motor vehicles or other equipment in the process of work. In modern civilization, the automobile has become an indispensable means of transportation for human beings. However, while the rapid development of the automobile industry and the increasing production and ownership of automobiles, automobiles have also brought air pollution, that is, automobile exhaust pollution.

In China's large and medium-sized cities, vehicle exhaust emissions have become a major source of air pollution.

2. The three-way catalytic converter can convert the harmful gases discharged from the engine combustion chamber into harmless carbon dioxide, water and nitrogen through oxidation-reduction reaction, and its role is environmental protection.

1) Slight blockage stage: In this stage, due to the adsorption of some chemical complexes on the surface of the catalytic converter, it only shows that the exhaust gas purification function is reduced, which is not conducive to environmental protection.

2) Moderate blockage stage: the chemical complex has accumulated on the surface of the catalyst to a certain extent, at this time, the exhaust back pressure increases, the fuel consumption increases, the power decreases, and the exhaust exceeds the standard and affects the annual inspection of the vehicle.

3) Severe blockage stage: At this time, a high-temperature sintering blockage is formed at the front end of the three-way catalytic converter, and the oxidation-reduction function is lost. The engine oxygen sensor starts to alarm, the vehicle often stalls, the engine noise increases, but the power is seriously reduced, and there is even a danger of spontaneous combustion of the vehicle.

3. Generally, the gap spacing of the spark plug is between, the larger the spark plug gap, the longer the arc generated during ignition, the easier it is to ignite the mixed gas in the gas cylinder, and the kinetic energy will naturally be greater. However, because the larger the gap, the greater the voltage required to break down the air during ignition, so the spark plug gap is different for different engines. Choosing the right spark plug clearance will make the engine function better.

What should I do if the car exhaust is unqualified, the car repairer has made a move, and it is no problem to pass these points!

The engine is too long, or the maintenance of the engine is not enough when driving, which has caused permanent damage to the engine, which may cause the car to fail the exhaust inspection, go to the repair shop to maintain the engine.

The main factors of incomplete combustion are: whether the air intake volume is sufficient, whether the ignition advance angle is correct, whether the valve clearance is correct, whether the compression pressure is low, etc.

It is also possible that there are human causes.

The main problem is the fit of the oil circuit.

Because it's not qualified! If the new car is not qualified, this is not when, generally speaking, the exhaust will not be unqualified, unless the car has been used for a long time.

The main reasons; You can check the three-way catalytic conversion device and check the phenomenon of exhaust emissions, which is black smoke and blue smoke. Then check the tightness of the cylinder ......

The reason for the unqualified automobile exhaust is mainly due to the blockage of the three-way catalytic converter. Gasoline is high in sulfur and phosphorus, so it forms a compound on the surface of oxygen sensors and catalytic converters. The reason for this is that the car engine cannot be fully burned due to the continuous starting and idling of the car while driving.

It will eventually adhere to the surface of the three-way catalytic converter along with the exhaust system, and will block the three-way catalytic converter in the long run, resulting in failure to work normally, making the car exhaust unqualified.

The solution to the unqualified car exhaust:

1. Increase the throttle of the comodal to make the car travel dozens of kilometers at high speed.

The blockage of the three-way catalytic converter is caused by the adhesion of substances that are not sufficiently burned during the engine of the car. Therefore, if the car is operated at high speed, the gasoline combustion can be sufficient, the pollutants emitted will also be reduced, and the strong air flow can effectively wash away the dirt attached to the three-way catalytic converter.

2. Clean the three-way catalytic converter regularly.

If you find this method troublesome, you can also remove dirty particles from the surface of the catalytic converter by cleaning it regularly.

It should be noted that the importance of the three-way catalytic converter for the car can be said to be irreplaceable, if it is not cleaned in time, the long-term blockage will not only lead to the exhaust is not up to standard, but also shorten its service life, and the spring destruction will cause spontaneous combustion of the car.

3. Clean the carbon deposits in the engine.

In addition to the reason of the three-way catalytic converter of the car, it may also be caused by the inability to fully burn the remaining carbon deposits in the long-term heavy operation of the engine, at this time, the engine needs to be professionally cleaned, and the operation needs to be sent to a professional repair shop to be handled by professionals. Engine cleaning can effectively reduce the emission of automobile exhaust, and at the same time, it can also achieve the effect of car maintenance, which can be described as the best of both worlds.

Photo by Li Caiying of Pacific Automobile Network).

Gasoline has high sulfur and phosphorus content, and it can form chemical complexes on the surface of oxygen sensors and three-way catalytic converters; Urban roads are congested, vehicles are constantly starting, stopping and idling, and the products of insufficient combustion will adhere to the surface of the three-way catalytic converter; Engine carbon particles can clog the three-way catalytic converter, which is the main reason for the unqualified automobile exhaust.

Unqualified solutions to automobile exhaust:

1. Hang 4th gear, run 5th gear with big throttle, and run dozens of kilometers.

Principle: Urban roads are congested, start and stop, combustion is insufficient, and pollutants are attached to the surface of the three-way catalytic converter. Gasoline combustion at high rpm emits the lowest amount of pollutants, and the high-speed air flow can also wash away the dirt attached to the ternary.

2. Keep the car hot and don't turn off the engine at idle. Slam the throttle in the middle for 3-5 minutes before the inspection.

Principle: The detection line on a cold car is the most unwise. The reason is simple, the optimal working temperature of the three-way catalytic converter is 400 to 800 degrees, and it takes a long time from cold to 400 degrees.

The detection point is a warm reminder of the note that the NO exceeds the standard, but it is: when the temperature of the engine is too high, the NO is easy to exceed the standard. Bombing the throttle for a few minutes before detection can quickly make the temperature of the three-spike bending element catalytic converter reach more than 400 degrees and keep it hot for a period of time.

3. Clean the three-way catalytic converter regularly.

Principle: China's gasoline has a high sulfur and phosphorus content, and chemical complexes are formed on the surface of the oxygen sensor and the three-way catalytic converter. Carbon deposits and particulate matter in the oil inlet duct will pollute the three-way catalytic converter.

As a result, the exhaust of the three generations is not smooth, the back pressure increases, the waste oil and power decrease, the ternary purification function is reduced or even fails, and the service life of 10-200,000 kilometers will be shortened by 3-50,000 kilometers. In severe cases, it will block the ternary, causing spontaneous combustion of the search vehicle.

Photo by Qi Hesong of Pacific Automobile Network).

There are many reasons that affect the unqualified emission of automobiles, such as too concentrated or too vertical slippery mixture, too large spark plug electrode gap, poor gasoline atomization, and failure of three-way catalytic converter or oxygen sensor.

There are two oxygen sensors, one behind the exhaust manifold and the other behind the three-way catalytic converter. The oxygen sensor is responsible for checking the oxygen content in the exhaust gas. The oxygen sensor feeds the signal back to the ECU, which then adjusts the air/fuel ratio based on this signal.

If the oxygen sensor is damaged, the ECU cannot accurately adjust the air-fuel ratio, which will affect the mixture being too thick or too thin, resulting in unsatisfactory exhaust emissions.

Three-way catalysis is responsible for shortening pollutants in exhaust gases. If the three-way catalysis is destroyed, the pollutants in the exhaust gas will also exceed the standard. The only solution is to replace the three-way catalytic converter with a new one. The ** of the original three-way catalytic converter is not cheap.

If the car has a very serious phenomenon of burning engine oil, it is recommended that the partner repair it immediately. Burning oil for a long time can affect three-way catalytic damage.

If the gasoline atomization is poor, then the gasoline can not be fully mixed with the air, which affects the incomplete combustion of the gasoline, so the pollutants in the exhaust gas will also exceed the standard.

The car's oxygen sensor needs to be replaced. If it is not replaced after long-term use, it will affect the failure of the oxygen sensor or the feedback data is inaccurate.

Finally, () Bian Xiao is honored to answer for you. What are the reasons for unqualified car exhaust? There are only a few answers to this question. I hope you can help you after reading it! If necessary, Bian Xiao is here waiting for your visit.

Unqualified automobile exhaust is also caused by many factors, let's find out, what is the reason for unqualified automobile exhaust?

1. The effect of the three-way catalytic converter is not good. It is very likely that the unqualified automobile exhaust is due to the poor effect of the three-way catalytic converter, and it is recommended to choose the best three-way catalytic converter, so as to avoid the unqualified automobile exhaust because of the poor effect of the three-way catalytic converter.

2. Excessive carbon accumulation in the cylinder. In the process of using the car, if there is too much carbon in the cylinder, it will also cause harmful pollutants in the exhaust gas emitted by the car or the exhaust gas is unqualified, and the carbon deposit in the cylinder needs to be cleaned up in time.

3. The fuel injector is blocked. If the fuel injector has a blocked combustion problem, it is easy to cause the car exhaust to be unqualified, and it is necessary to clean the fuel injector or replace the fuel injector when the skin is weak.

4. The failure of the mechanical fiber cleaning machinery of the vehicle itself. If there are some mechanical failures in the car, it will also cause the car exhaust to be unqualified, and it needs to be dealt with in time according to the cause of the failure.

5. Insufficient gasoline combustion. If the gasoline combustion is insufficient, you can check the oil circuit and engine, and deal with it in time.

There are many reasons for unqualified automobile exhaust, such as too thick or too thin mixture, too large spark plug electrode gap, poor gasoline atomization, three-way catalytic converter or oxygen sensor failure, etc. There are generally two oxygen sensors, one behind the exhaust manifold and the other behind the three-way catalytic converter. The oxygen sensor is responsible for detecting and measuring the oxygen content in the exhaust gas.

The oxygen sensor feeds the signal back to the ECU, which then adjusts the air-fuel ratio based on the signal from the Silver Bridge. If the oxygen sensor is damaged, the ECU is unable to accurately adjust the air-to-fuel ratio, which can lead to over-concentrated or over-dilute mixtures, resulting in substandard exhaust emissions. Three-way catalysis is responsible for reducing pollutants in exhaust gases.

If the three-way macro is damaged, the pollutants in the exhaust gas will also exceed the standard. The only solution is to replace the three-way catalyst with a new one. The ** of the original three-way catalyst is not cheap.

If the oil burning in the car is serious, it is recommended that the owner repair it in time. Long-term combustion of engine oil can cause damage to the three-way catalytic converter. If the gasoline is not atomized well, the gasoline cannot be fully mixed with the air, which will lead to insufficient combustion of the gasoline, so the pollutants in the exhaust gas will also exceed the standard.

The car's oxygen sensor needs to be replaced. Long-term use without replacement can lead to failure of the oxygen sensor or inaccurate feedback data.

With the development of social economy, it is not difficult to buy a car. Many people will buy a car for the convenience of travel, but after buying, they will find that the annual inspection of the car is a headache. The annual inspection of a car is a process that every car owner must go through.

The original intention of the annual inspection is to check the safety performance of the car and add an extra layer of safety to the driver. However, in the process of annual inspection of many people's cars, there will always be many substandard places, the most common of which is the problem of excessive automobile exhaust emissions. What's going on?

Today, let's talk about the causes and solutions of excessive automobile exhaust gases.

The main reason for the excess exhaust gas is the blockage of the three-way catalytic converter. Gasoline is known to have high levels of sulfur and phosphorus, which can form compounds on the surface of oxygen sensors and three-way catalysts. The reason for this compound is that the car keeps starting idling while driving, which will cause the car engine to burn inadequately.

These incomplete combustion products will eventually adhere to the surface of the three-way catalytic converter along with the exhaust system. In the long run, these particles will clog the three-way catalytic converter, causing it to not work properly and making the car exhaust unqualified.

How to solve the problem of unqualified automobile exhaust?

1. Increase the throttle so that the car can travel dozens of kilometers at high speed.

The blockage of the three-way catalytic converter is caused by the adhesion of substances that are not sufficiently burned during the engine of the car. Therefore, if the car is driving at high speeds, the combustion of gasoline can be fully realized, the pollutants emitted will also be reduced, and the strong air flow it expels can also effectively wash away the dirt attached to the three-way catalytic converter.

2.Clean the three-way catalytic converter regularly.

If the above method is more troublesome, we can also regularly clean the three-way catalytic converter to remove dirty particles attached to its surface.

It should be noted that the importance of three-way catalytic converters for automobiles can be described as non-containment and replaceable. If not cleaned in time, long-term blockage will not only lead to substandard exhaust, but also shorten its service life and even lead to spontaneous combustion.

3.Clean engine carbon deposits.

In addition to the three-way catalytic converter of the car, it may also be caused by the carbon deposits left after the engine runs for a long time and cannot be completely burned. At this time, the engine needs to be professionally cleaned, and the operation needs to be sent to a professional repair shop to be handled by professional socks state personnel. Engine cleaning can effectively reduce vehicle exhaust emissions while also achieving maintenance results for the car, which can be described as the best of both worlds.