The Yunnei 4102 China IV engine emits blue smoke from the cold start

The blue smoke from the engine is basically burning the engine oil, and there are many reasons for this, roughly the following situations:

1. If the back pressure of the oil return oil circuit of the supercharger is too high, check whether the supercharger is leaking and whether the oil return pipe is blocked.

2. The exhaust gas valve is damaged, and the oil and gas cannot be separated, and it re-enters the combustion chamber for combustion.

3. The valve oil seal is aged, damaged or damaged, and the gap between the valve and the guide is too large.

Fourth, the oil exceeds the upper limit, so that the crankshaft throws the oil into the combustion chamber to participate in the combustion during high-speed operation.

5. The engine is severely worn, resulting in too large a gap between the piston and the cylinder wall, and the oil enters the combustion chamber through the gap.

Sixth, the piston ring is stuck, and the cylinder wall oil participates in the combustion. This is the reason why most cars burn engine oil.

The solution to burning engine oil.

Dismantling the engine for overhaul will destroy the airtightness and precision of the engine. And there is a possibility that the engine oil will burn again after tens of thousands of kilometers, so overhauling the engine is not sustainable.

With the progress of science and technology, the current dismantle-free repair technology has been very mature and has gradually been recognized and accepted by the majority of car owners. It not only saves the cost of car maintenance, but also protects the original car accessories. With exclusive patented technology, the company has universal non-destructive repair technology, which repairs and releases piston ring stuck oil while driving, and the effect is remarkable.

Hello! Not surprising. 1. The cold start is that the piston gap of the cylinder is large, the seal has not yet reached the optimum, and the organic oil residue in the cylinder is inherent, so there will be blue smoke for a short time.

After the warm-up, seal well and the blue smoke disappears. 2. The fuel injection time has not been adjusted to the best during cold start, which is generally slow and the combustion is not complete, so it will also aggravate the smoke situation.

When in doubt, please ask.

When you get up in the morning, the blue smoke is generally due to the failure of the valve oil seal, and it is generally necessary to repair it. If the cylinder pressure is normal, the oil pump injection time is too late, and the oil pump can adjust the fuel injection nozzle on the line. But now you have replaced the piston ring, the cylinder pressure should be normal, you have to take a closer look at the current emergency throttle is gray beam smoke or blue smoke, if it is gray smoke is normal, if the blue smoke is going to the repair shop to check the cylinder pressure, if the cylinder pressure is low may need to be repaired or overhauled, if the cylinder pressure is normal, change a set of gas rotten state door oil seals.

Hello, I am your exclusive elite technician, we promise to be attentive, careful, and attentive to answer your car questions. Hello, Yunnei 4102 country 4 engine put for a while sometimes can not play for the following reasons, the first is that you buried the crankshaft position sensor is damaged, resulting in the engine computer board can not recognize the speed. The second word is that your oil pump and grease nozzle are damaged and you can't supply oil, and the third word is that your neutral switch is damaged, because this car says that it is coarse'The neutral switch is damaged, and the engine computer can't recognize the neutral position, so it is recommended that you first check whether the fuel nozzle is injected.

Summary. Dear, hello, it is a pleasure to serve you, the reasons for the difficulty of cold start of Yunnei 4102 National V EFI are as follows:1

First of all, check whether there is too much carbon at the throttle valve and the idle valve, too much carbon will easily cause the idle airway to be blocked and then lead to poor air intake, so if there is too much carbon deposit, the first thing to do is to clean the carbon deposit, 2Then there is the check to see if the water temperature sensor of the engine control system is working properly.

Dear, hello, it is a pleasure to serve you, the reasons for the difficulty of cold start of Yunnei 4102 National V EFI are as follows:1First of all, check whether there is too much carbon at the throttle valve and the idle valve, and too much carbon will easily cause the idle gas jacket rental channel to be blocked, which will lead to poor air intake, so if the carbon deposit is too much, the first thing to do is to clean the carbon deposit, 2

Another trembling finger is to check whether the water temperature sensor of the engine control system is working properly.

Extended information: China V generally refers to the fifth stage of the national motor vehicle pollutant emission standards. The national fifth-stage motor vehicle pollutant emission standard, referred to as the "national fifth standard", is equivalent to the fifth-stage emission standard being implemented in Europe.

1. The piston clearance of the engine is too large, resulting in a decrease in the compression ratio and insufficient combustion.

Second, if the fuel mixture is too thick, it will also cause incomplete combustion.

Today's engines have an oil wiper ring on the piston, and when the oil is sprayed on the piston column for lubrication, the wiper ring scrapes the excess oil back into the oil tank.

The fuel mixture is too thick or the atomization is not good, it will cause the engine to be unable to emit black smoke, here it is necessary to divide cars and motorcycles, cars are mostly EFI, motorcycles are carburetors, clean EFI nozzles or carburetors to see if there is any improvement.

Then check the oil consumption frequently, if the consumption is too large, then you can only overhaul the engine.

1. Reasons.

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.

1. The white smoke is formed because the diesel fuel is discharged into the exhaust pipe without combustion, and the atomized diesel is formed. Turn on whether the combustion is not good, or check whether the injector is leaking.

2. The diesel engine is an engine that burns diesel to obtain energy release, which has the advantages of high power and good economic performance. The advantages of diesel engines are high power and good economic performance. The working process of a diesel engine has many similarities with a gasoline engine, and each working cycle also goes through four strokes: air intake, compression, work, and exhaust.

However, because the fuel used in diesel engine is diesel, its viscosity is greater than that of gasoline, it is not easy to evaporate, and its autoignition temperature is lower than that of gasoline, so the formation and ignition of combustible mixture are different from gasoline engines. The main difference is that the mixture in the cylinders of a diesel engine is compression-ignited, not ignited. When the diesel engine is working, it is air that enters the cylinder, and when the air in the cylinder is compressed to the end point, the temperature is 500-700oC, and the pressure is 40-50 atmospheres.

Check the fuel supply time of the supercharger oil pump to see if the moisture content of the diesel is too large, if the car is cold in winter, the white smoke is big, and the car is hot, and there is no smoke, it will be fine.

If a diesel car with a supercharger emits white smoke, the supercharger is broken.

1. The oil supply of the oil pump is too large.

2. There is a problem with the turbine. Or there is a leak in the air intake line.

3. Fuel injector, poor atomization, generally carbon deposition problem.

4. The injection time is not right, and the advance angle is too small.

5. The oil pump is faulty and the oil supply pressure is insufficient.

On plateaus, and black smoke is normal when accelerating sharply. Insufficient air intake illuminates insufficient combustion.