What is the phenomenon of intake pipe tempering?

The tempering of the intake pipe is due to insufficient oil supply and too thin mixture. The lean mixture slows down the combustion speed of the mixture, and the combustion continues until the intake valve opens at the end of the exhaust stroke. The fresh mixture is ignited when it meets the unburned combustion gas in the cylinder, and is ejected from the intake port in a counter-current manner through the intake manifold and tempered.

The tempering of intake pipe is due to late ignition or poor spark quality. On the one hand, it delays the start of combustion; On the other hand, it will also slow down the combustion speed, which will lead to the combustion continuing until the intake valve opens, leading to the tempering of the intake pipe. At the same time, it should be accompanied by the following phenomena: the engine speed increases slowly when accelerating, the tempering phenomenon is obvious when accelerating rapidly, and sometimes there is tempering phenomenon when accelerating slowly. At the same time, the exhaust pipe is stuffy and the engine temperature is easy to rise.

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Engine ignition advance angle is an important parameter of engine working conditions, which directly leads to different engine working conditions. Generally, high-equipped engines will adopt secondary injection technology when the car is cold and idling fast, so that the engine can enter the working state as soon as possible. At this time, the importance of ignition advance angle is self-evident.

Most engines use different technologies, such as variable valve timing or variable valve timing. The basic principle is probably the same, mainly adjusting the phase or valve opening angle at any time according to different working conditions of the engine, which has made the engine reach the best. Of course, there is a problem with this system, which is not only as simple as engine tempering, but also may lead to job replacement and cylinder pulling.

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