In the winter, we see that the white smoke protruding from the exhaust cylinder is water vapor, and when the water vapor passes through the cold exhaust cylinder, it will condense into small water droplets, accumulate into more, and flow out of the exhaust cylinder.
Seeing this, you may ask: Since dripping water is a good thing, then why do some drops more and some do not drop? Is a car that doesn't drip water burn badly? In fact, the exhaust pipe drip is to meet three conditions, not to drip.
1
The oil-gas mixing ratio should be correct
Regardless of whether the engine is EFI or carburetor, this means that the vehicle's fuel supply system is normal, the compression ratio is normal, and the fuel consumption is within the normal range.
This object is an oil injection seat, and its normal oil supply is normal.
2
The engine cylinder pressure is normal
Normal cylinder pressure means that the engine cylinder block has not yet appeared wear, cylinder liner, sealing ring and other parts are not a problem, if the engine inside the wear, will lead to the cylinder pressure become low, the final result is not complete combustion, combustion is not completely where does the water come from?
If there is wear inside the engine, it will lead to low cylinder pressure and incomplete combustion.
3
The exhaust temperature is normal
The heat that erupts from the engine workmanship is in the cylinder, and only a small amount of heat overflows into the exhaust cylinder, which means that the power output of the engine is stable, if the temperature of the exhaust cylinder is too high, the water vapor cannot form water droplets.
But there are exceptions: if the cooling water tank in the engine leaks, the cooling water is exposed to the combustion chamber, which can also cause the exhaust pipe to drip. If you feel that your car is dripping abnormally, you can eliminate it by looking at whether there is a leak in the cooling water tank of the engine compartment.
In addition, if the exhaust gas is milky white oil mist, dripping on the ground will solidify and clump, it is likely to be poor fuel vaporization. Mainly because the temperature is too low, the fuel atomization is poor, usually after the engine starts and disappears with the increase of the engine temperature.
How to avoid water droplets corroding the exhaust pipe?
Although the dripping exhaust of the car reflects the performance of the car, the more the better. Too much water in the exhaust cylinder can damage the oxygen sensor in the three-way catalytic converter, resulting in inaccurate fuel supply to the engine and affecting the performance of the car. On the other hand, the long stay of water droplets in the exhaust pipe will also accelerate the corrosion of the pipeline.
Therefore, when the car is designed, it has a small opening under each exhaust pipe. Therefore, if you find that the exhaust pipe of your car has rust spots, it is recommended to check whether the small opening of the exhaust cylinder is blocked and cleaned up in time.