Exhaust manifold role.
The main function of the exhaust manifold is to collect and guide the exhaust gas produced by the engine cylinders, and introduce it into the middle and tail of the exhaust pipe, and finally discharge it into the atmosphere.
The exhaust manifold is a component that is closely connected to the engine cylinder block and is designed to minimize exhaust resistance and avoid mutual interference of exhaust gases between the cylinders. If the exhaust is too concentrated, it may cause the work between the cylinders to interfere with each other, increase the exhaust resistance, and then reduce the output power of the engine. In order to solve this problem, the design of the exhaust manifold usually makes the exhaust of the cylinders as separate as possible, one branch per cylinder, or two cylinders one branch, and make each branch as long as possible and independently formed to reduce the mutual influence of gases in different tubes. This design not only helps to improve the exhaust efficiency and power performance of the engine, but also ensures that the exhaust gas can be safely discharged into the atmosphere, while controlling the release of harmful substances.
In addition, the exhaust manifold also plays a crucial role in the automotive exhaust system. It reduces airflow resistance by reducing exhaust resistance, preventing interference between exhaust gases between cylinders, and optimizing pipe design to ensure that exhaust gases can be discharged as cleanly as possible around the corners of the inlet. Together, these measures help improve the engine's fuel economy, power performance and emissions standards.
How to determine if the exhaust pipe is blocked?
Ways to determine if the exhaust pipe is blocked include :
dull sound when refueling : If the sound becomes dull when refueling quickly, it may be a sign of blocked exhaust pipe.
red exhaust pipe : If the exhaust pipe burns red after a few minutes of refueling, this is also a sign of blockage.
Use an auto endoscope : You can remove the exhaust pipe and use the auto endoscope to see if there is blockage.
cylinder break method : Through cylinder by cylinder oil break inspection, find abnormal cylinder and damaged parts.
weak acceleration : If the vehicle feels a lack of power when accelerating, it may be a blockage in the exhaust pipe.
automatic transmission anomaly : If the automatic vehicle frequently forces downshift, it may be the exhaust pipe blockage that causes the engine power to decrease.
engine abnormal sound : in emergency acceleration or refueling, if the engine has a slight stall or abnormal sound, it may be a problem with the exhaust pipe.
abnormal exhaust sound : In the rapid acceleration or quick throttle, if the exhaust pipe makes abnormal sound, usually there is a problem with the exhaust pipe.
engine fails to start : If the engine both sprays oil and fires, but does not start, it may be that the exhaust system is completely blocked.
Specific symptoms of exhaust pipe blockage
Specific symptoms of a blocked exhaust pipe include :
weak acceleration : the vehicle is weak in the acceleration process and the power output is insufficient.
frequent forced downshifts of automatic transmission : The clogged exhaust pipe causes the engine power to decrease, and the automatic transmission frequently forces downshifts to adapt to the driver's acceleration needs.
slight tempering of the engine during urgent refueling : blockage of the exhaust pipe causes part of the exhaust gas to remain, the mixed gasoline becomes thinner, the combustion speed slows down, and the tempering phenomenon occurs.
abnormal exhaust noise : In the rapid acceleration or rapid acceleration of the throttle, the exhaust pipe makes abnormal sound, usually caused by damage to the three-way catalytic converter.
startup difficulty : even after the engine is fired and injected, it cannot start, possibly because the exhaust system is completely blocked.
Solution to exhaust pipe blockage
Solutions to a clogged exhaust pipe include :
Clean up carbon : If the blockage is due to excessive carbon accumulation, you can remove the exhaust pipe, use a rubber mallet gently tap the outside, so that the internal carbon accumulation off and poured out from the other end.
Using tools : Use tools, such as thin rods and iron wires, to clean up the congestion, but be careful to avoid damaging the exhaust pipe or other components.
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