What's the smoke from Haval h6 exhaust pipe?

It is normal for the exhaust pipe to smoke, which is the gas discharged after the steam with good combustion is heated. It is normal to smoke black smoke for a short time. When the cold car is just started in the morning, the driving computer will increase the fuel injection amount of the fuel injector, resulting in a thick mixture, some of which can not be fully burned and discharged directly from the exhaust pipe, so black smoke will be emitted in a short time after starting.

Exhaust pipe is a part of engine exhaust system, which mainly includes exhaust manifold, exhaust pipe and muffler. The exhaust system is also equipped with a three-way catalytic converter, which is generally used to control the emission of engine pollutants. The exhaust pipe usually includes a front exhaust pipe and a rear exhaust pipe.

The back pressure exhaust pipe will sound better than the original factory. Most of the original cars use this kind of pipeline to generate a kind of pressure, which mainly returns to the cylinder through the volume change of the grille muffler or the pipeline inside the pipeline. When the engine is ignited, the piston will start its power stroke, and the exhaust valve will open before the piston reaches the bottom dead center. At this time, the back pressure in the pipeline will prevent the exhaust gas from rushing out and make the mixture burn completely. However, if the back pressure is too strong, the exhaust gas can not be completely discharged from the cylinder, which will cause the exhaust gas to burn with the mixed gas and reduce the combustion efficiency. Of course, the most direct way is voice output horsepower. Advantages: low noise and good low-speed torque. Disadvantages: exhaust gas can not be discharged at high speed, which affects the power output of the engine and has a small volume.