Why is it easy to form carbon deposits in the throttle?

Engine carbon deposition refers to the insufficient combustion of "coke" substances or "sulfur" substances in the gasoline in the engine combustion chamber plus part of the oil mixed into the combustion chamber, usually on the top of the piston, the top of the cylinder head, the spark plug, the valve, and the exhaust pipe! As for the dirty stuff in the throttle, it's just unfiltered dust!

Ways to remove carbon deposits:

First, add high-grade gasoline (97) to run at a speed of more than 90 yards for more than half an hour, or add additives to the gasoline to remove carbon deposits!

Second, for cars that have been channeled oil, only the piston rings and valve seals can be replaced.

Third, for cars with serious wear and tear on the cylinder, you can only bore the cylinder and replace the piston ring and valve seal!

How to clean the throttle dirt:

First, remove the intake pipe, expose the throttle, one person in the car to keep the engine 3000 3500 rpm, the other with "carburetor cleaner" to spray the throttle (need to note: the amount of each spray should not be too large, otherwise it will cause the engine to stall) generally spray 1 3 bottles!

Second: remove the intake pipe, expose the throttle, remove the negative pole of the battery, (need to note: be sure to remove the negative pole of the battery) turn off the ignition switch, straighten the throttle flap, spray a small amount of "carburetor cleaner" into the throttle and then use a polyester rag (note:

Cotton rags must not be used) or high-spinning "non-woven fabrics" carefully scrubbed, deep in the throttle, where the hand is out of reach, you can use a clip to grip the rag and scrub carefully, clean and install the intake pipe, and the negative electrode of the battery can be ignited! (Under normal circumstances, because there will be some "carburetor cleaner" left in the intake branch, it generally takes 3 to 5 seconds to ignite the engine).

Because it is a combustion chamber, where gasoline is burned and converted into kinetic energy, carbon deposits will be formed over a long time, and you must also be aware of carbon deposits, or it will affect the ignition of the car.

There are many factors.

1.When the air filter does not block a small amount of dust enters the engine, it passes through the throttle valve and is adsorbed by the oil on the throttle, forming carbon deposits over time.

2.There is a waste pipe on the engine valve chamber cover that is like an air intake pipe, and when it passes through the throttle valve, it is adsorbed on it, and after a long time, it is subjected to high temperatures, and carbon deposits are formed.

In fact, not only on the throttle, but also in the intake branch, but it is inconvenient to clean the branch. So without this service of cleaning the branch, the throttle is easier to clean, and many sensors are on the throttle, so it is more important to clean the throttle.

Mainly in the maintenance of the engine.

Causes of throttle deposition:

Mainly from the oil vapor, followed by heavy particulates and moisture in the air, which means that with a good air filter and the removal of the crankcase ventilation duct, the throttle will be much slower. The crankcase has a built-in crankshaft, and the bottom is connected to the oil bottom, and the working temperature of this part is about 100 degrees to 180 degrees. The oil will be heated and volatilized in use, the longer the use, the higher the temperature, the stronger the volatilization, plus the cylinder compressed air will be squeezed into the crankcase through the gap of the piston ring, so there must be a channel to release the gas, otherwise the oil bottom will form a positive pressure.

The reason why the crankcase ventilation pipe is connected to the throttle valve is, on the one hand, an environmental requirement, and on the other hand, the air is extracted from the crankcase by the negative pressure of the intake air. When the oily vapor reaches the intake pipe, it becomes cold, and the oil in it will condense on the intake tract and throttle, and the carbon deposits in the steam will also be deposited in these parts, because the air flow in the gap of the throttle opening is large, the space is small, and the gas temperature is low, so this part is the most prone to condensation.

In view of the hazards of carbon deposits, drivers should do the following: first of all, regular maintenance should be done to keep the oil and gas clean; Secondly, the carbon deposit should be cleaned every 30,000 kilometers (no dismantling and cleaning); Finally, pay attention to driving habits, avoid idling and stopping for a long time, avoid turning off the engine immediately after high-speed driving, avoid high-speed driving immediately after starting, and control the timing of gear change at about 2000-3000 rpm.

Formation of carbon deposits:

1.Incomplete air filtration, dust, impurities, cylinders, air intakes, adhesion accumulation.

2.Gas with impurities, oil sludge, piston ring groove, high temperature, carbon deposit.

3.Fuel quality, inadequate combustion, residual carbon.

4.Urban short-distance and low-speed road operation Engine load is large, residual oil droplets, adsorption of impurities, carbon deposition in the nozzle.

Hazards of carbon deposits:

1.Blocking the oil passage, causing poor oil supply, accelerating the wear of parts, and shortening the service life.

2.Reduce the tightness of the cylinder, lose the cylinder pressure, and make the fuel combustion inadequate.

3.Carbon deposits in the combustion chamber form local hot spots, resulting in knocking and loss of power.

4.Carbon deposition in the fuel injector causes poor atomization and high fuel consumption; More seriously, it can affect various sensors and damage the engine.

5.Carbon deposition in the intake manifold leads to unsmooth intake and exhaust air, low combustion efficiency, and reduced horsepower.

When the temperature of the engine oil increases, some of the oil vapor is generated. Oil vapor will pass through the throttle valve before entering the cylinder, when the throttle has oil vapor, it is easy to adhere to dust, and the air filter element can not filter all the dust 100%, and a small amount of dust will pass through all the throttle, and carbon deposits will be formed over time.

How to clean and prevent need to pay attention:It should be disassembled and cleaned;

Corrected some cleaning errors in the throttle.

Throttle:

The throttle valve is a controllable valve that controls the entry of air into the engine, and after the gas enters the intake pipe, it will mix with gasoline to become a combustible mixture, thereby combusting to form work. It is connected to the air filter and the engine block, which is known as the throat of the automobile engine.

The throttle four-stroke gasoline engine is roughly like this. The throttle valve is one of the most important components of the EFI engine system today, its upper part is the air filter air grid, and the lower part is the engine block, which is the throat of the automobile engine. Whether the car accelerates flexibly or not has a lot to do with the dirt of the throttle, which can reduce fuel consumption and make the engine flexible and powerful.

The above content reference: Encyclopedia - throttle.

To know the best way to clean up carbon deposits, first know how it is created.

Why is carbon deposited generated? This is because the fuel itself contains gum, impurities, dust, moisture, etc., which accumulate over time to form sludge and other deposits in the fuel tank, oil inlet pipe, etc.; The second is due to the oxidation and polymerization of unstable components such as olefins in gasoline at high temperatures, forming colloidal and resinous viscous, which stays in the fuel injector, air intake valve, etc., and the deposit will become hard carbon deposits when burned. In addition, traffic congestion, cars are often at low speed and idling, which can aggravate the formation and exacerbation of carbon deposits and sediments.

If carbon deposits are not cleaned in time, carbon deposits and deposits will block the needle valve and valve hole of the fuel injector, resulting in poor closure of the intake valve, a drop in cylinder pressure or even tempering, resulting in unstable engine idling, increased fuel consumption and deterioration of exhaust emissions.

Carbon deposits on the piston top and cylinder head can easily cause local overheating of the combustion chamber and gasoline preheating, resulting in engine knocking and other failures. These failures can shorten the life of the engine.

The best way to clean up carbon deposits in your car:

1. In fact, the hanging bottle is filled with a pressurized atomized cleaning agent, and the cleaning agent is sent into the air inlet to carry out a "solvent dissolution" reaction with the carbon deposition of the throttle valve, fuel injector and other components, and then the carbon deposition is cleaned out of the engine by using the high engine speed, but the carbon deposition is very serious, which will cause the three-way catalytic system to be blocked or even damaged;

2. The use of detergent pours the cleaning agent into the machine, sprays it into the combustion chamber with machine pressure, allows the cleaning agent to react with the carbon deposit to dissolve, and then extracts the waste liquid, if the carbon deposit is very serious, the large carbon that falls can not be completely extracted, which may damage the combustion chamber;

3. It is best to use an effective release agent, which will clean the oil circuit and carbon deposits, and release the piston ring. If you want to use a PNF-type cleaner, you can release the piston ring.

Carbon deposits are deposits that result from incomplete combustion of fuel and lubricant mixed blow-by. The formation of deposits (mainly hydroxy acids, asphaltenes, tar, etc.) is directly related to the "fuel" and "lubricating oil" of automobiles. Carbon deposition can be divided into two types: valve, combustion chamber carbon deposition and intake pipe carbon deposition.

Carbon deposits reduce engine power, causing uneven and gradual degradation of power output, in other words, less and less power. It will also increase fuel consumption and increase the economic burden. Eggs may also make it difficult to ignite and not easily land in the car.

Serious carbon deposition in the combustion chamber will also cause cylinder knocking, and there will be a sound of acceleration at low speed, which will cause damage to the piston and crankshaft, thus seriously affecting the safety of the car.

Carbon deposits on the throttle are mainly from oil vapor, followed by air-heavy particulates and moisture.

Hello, there is dust in the intake air, which can be replaced frequently or blown to reduce carbon deposition. Hope mine can help you. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

The fine dust that cannot be filtered out by the air filter is formed by long-term accumulation [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Si Youpu said that the reason for the formation of carbon deposits is introduced.

The cause and process of carbon deposition on the throttle.

Throttle fouling is caused mainly by oil vapor, followed by particulates and moisture in the air. Because after the mixture in the cylinder is burned, part of the exhaust gas enters the crankcase, and the pressure in the crankcase will increase over time, so it is necessary to release part of the gas to reduce the pressure of the crankcase, so there is a device for forced ventilation of the crankshaft. It transports residual fuel from the crankcase to the intake manifold for re-combustion.

However, most of the exhaust gases are also mixed with some oil vapor, which adheres to the back of the throttle when the throttle opening is small. Because the inhaled air contains fine dust, it cannot be completely filtered by the air filter, so it is adsorbed together by the viscous oil, forming a lacquer at high temperatures, accumulating over a long time, and mixing with wax and other components in the fuel to form carbon deposits.

Causes of throttle carbon deposition:1. When the temperature rises, some oil vapor is produced.

The oil will pass through the throttle valve before entering the cylinder. When there is oil vapor at the throttle, it is easy to adhere to dust. Air air filters do not filter 100% of all dust, and a small amount of dust will pass through all throttle valves, forming carbon deposits over time.

2.Some gasoline vapor and oil vapor come from the crankcase. Before entering the cylinder, the oil and gas must pass through the throttle valve.

Over time, these oil vapours combine with dust and become hard carbon deposits. 3.Engine oil lubricates engine cylinders and piston rings, but at high temperatures, the oil evaporates a lot.

Some of the oil vapor enters the intake pipe from the crankcase, and some of the oil stays on the throttle, causing carbon deposits.

The reasons for the carbon deposition of the throttle are: the long-term bad driving habits of the car owner; The oil label does not match the compression ratio; aging or damage to the engine carburetor; prolonged driving under heavy load; Do not change the air cleaner; Inaccurate ignition time or oil supply time; low engine temperature; Poor sealing of valves and valve seat inserts; The engine idles for a long time. The engine throttle valve is located at the engine intake, in front of the intake manifold behind the engine air cleaner, the throttle valve is a controllable valve that controls the air to enter the engine, and the gas will be mixed with gasoline to form a combustible mixture after entering the intake pipe, so as to burn the work.

The impact of throttle blockage is: the vehicle idles and shakes, and it is not easy to ignite the cold car; It is easy to stall after accelerating the oil recovery sharply; This leads to increased fuel consumption and engine shaking.

The cause of carbon deposition in the throttle valve is the increase in oil temperature, which produces some oil vapor. When there is oil vapor in the throttle valve, it is easy to attach dust, and the air filter does not filter all the dust 100%, and a small amount of dust will pass through the throttle, which will form carbon deposits over time. Hazards of throttle carbon deposits:

Slight or moderate carbon deposition has little impact on daily driving, but it has a large impact on idle conditions. The throttle opening is very small at idling, and carbon deposition will further reduce the air intake at idle, resulting in unstable engine operation and even stalling. In addition, the power decreases, the fuel consumption rises, the car is weak, the exhaust pollutant emissions increase and other failures, in serious cases, it may cause valve burnout, premature ignition or cylinder bursting or even scrap.

The solution to carbon deposit: disassemble the throttle assembly, prepare a clean cloth and a bottle of carburetor cleaner, spray the carburetor cleaner on the cloth, slowly wipe off the carbon deposits on it, and remember not to rub it with a hard object when encountering stubborn carbon deposits, because once damaged, it cannot be repaired, you can wipe it with a detergent several times, and then reassemble it.