What will happen if the air intake pipe of the car breaks and leaks, and what effect will it have on the car?
If it is in front of the air filter, the impact is not great; If it is in the rear section of the air filter element, it needs to be replaced, then unfiltered air will enter the engine, and the throttle valve will become dirty after a long time, which will also affect the working state of the engine, cause carbon deposition, increase wear and shorten the service life of the engine.
Why? Because the surface of the intake pipe needs to be smooth to reduce friction and the intake pipe is fixed on the cylinder head, asbestos gasket or asbestos rubber gasket should be used to ensure the sealing performance of the intake pipe. The intake pipe can evenly distribute the combustible mixture and air to each cylinder. Secondly, it can evaporate oil film and combustible mixture.
If it is broken, it will suck in sediment and cause the engine to pull the cylinder, which has the disadvantages of less power intake, insufficient fuel combustion, insufficient power, loud noise and great change in intake pressure.
Classification of intake pipe
The shapes of intake pipes with different shapes, lengths and cross-sectional areas represent the design requirements of engines. From the appearance, the intake pipe can be divided into vertical intake and rotary intake.
Due to the small intake resistance, the vertical intake port is conducive to the formation of resonance at high speed, improving intake efficiency, and is also conducive to the arrangement of fuel nozzles, which is generally suitable for engines with strong performance at high speed. The swirl inlet is helpful to generate swirl during intake, improve the mixing degree of air and gasoline, and improve the combustion efficiency in the cylinder at low speed, which is generally suitable for engines with strong low-speed performance.
For example, BMW's brand, V 10 engine on M5, does not adopt many complicated technologies to improve the response speed and high power output at high speed like Mitsubishi and Honda in Japan, but adopts the most direct and pure way to interpret high performance. The ten intake pipes of this V 10 engine are very short and vertical, and each intake pipe is equipped with a throttle valve, which is the most obvious design feature that emphasizes high speed and high response.
The most obvious rotation of the air intake is the diesel engine. The speed of diesel engine is generally not high, and the focus is on the dynamic performance at low speed. Therefore, all diesel engines adopt swirl intake without exception. In order to generate the maximum intake vortex and improve the mixing degree of air, fuel and gas, some diesel vehicles deliberately increase the vortex at the intake end.
However, when the speed increases, the intake speed and frequency become faster and faster, and the vortex generated by airflow inertia becomes the chief culprit to reduce the intake efficiency, which is not convenient for the oil-gas mixture to be sucked into the cylinder faster. It's actually quite understandable. For air, the gas resistance of rotating pipe is definitely much larger than that of straight pipe. Therefore, vertical air intake is more suitable for the working condition of the engine.
Expansion data of automobile intake pipe
The intake pipe of internal combustion engine refers to the pipe that introduces the gas needed for combustion of internal combustion engine into the engine. The intake pipe must ensure sufficient flow area, avoid turning and sudden change of section, and improve the surface smoothness of the pipe to reduce resistance. Therefore, the high-performance gasoline engine adopts the linear intake system. At the same time of linearization, the length of throttle and intake pipe and the volume of pressure stabilizing cavity are reasonably designed to achieve the purpose of high speed and high power.
The intake pipe is one of the largest different structural components of electronically controlled fuel injection engine and carburetor engine. There is only air flowing in the intake pipe of EFI engine, so when designing the intake pipe structure, we should fully consider the dynamic effect (inertia effect and fluctuation effect) of the intake pipe to improve the charging efficiency, and also consider the uniformity of intake.
The good dynamic matching between the intake system and the engine can greatly improve the torque characteristics of the engine in a wide speed range. In practical application, according to the inertia effect and fluctuation effect of intake, the intake pipe with specific length and variable length is designed.
The air inlet pipe comprises an air inlet main pipe and an air inlet branch pipe. In addition to power, the engine should have good economy and emission performance. In gasoline engines, atomization, evaporation, combustion distribution and pressure wave utilization must also be considered in the intake pipe. On the diesel engine, it is also required that the air flow forms an intake vortex in the cylinder through the air inlet to improve the formation and combustion of the mixture.
These requirements are usually contradictory. For example, in order to obtain high speed and high power, the diameter of the intake pipe should be larger, while in order to achieve low-speed economy, the intake pipe should be smaller, so it must be handled harmoniously according to the purpose.
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