About Exhaust-system
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Exhaust-system purpose
The exhaust system reduces the pollutant constituents of the exhaust gas generated by combustion in the engine. The remaining exhaust gas is then discharged as quietly as possible at a convenient point of the vehicle.
Exhaust-system design
A car exhaust system consists basically of three main components:
Catalytic Converter
The catalytic converter serves as an exhaust-gas cleaning device for spark ignition (SI) engines. It is mounted as close as possible to the engine so that it can quickly reach its operating temperature and therefore be effective in urban driving. It is fitted as supplementary equipment in place of the front muffler, whose acoustical functions it also takes over in addition to its exhaust-gas cleaning function.
Mufflers
Depending on the size of the vehicle and the engine, one or several mufflers are used. In V-engines the left and right cylinder banks are frequently run separately and only brought together at the end of the vehicle in one large muffler.
Exhaust Pipes
The exhaust pipes are the third and last component in the exhaust system. They combine the exhaust-gas outlets in the cylinder head into one or more pipes (manifolds), and also connect the catalytic converter(s) and the mufflers to each other. The length and cross-section of the pipes, as well as the type of junction used, influence the vehicle's performance characteristics and acoustic behavior. Exhaust systems for vehicles with larger swept volumes are therefore often fitted with twin pipes
The entire exhaust system is connected with the underbody of the vehicle via flexible suspension elements. The fixing points must be carefully selected, as otherwise vibration can be transmitted to the bodywork and thus generate noise in the passenger compartment. The exhaust-system noise at the exhaust-emission point (tailpipe) can also cause bodywork resonances.
Also you can read some information about Tailpipe on this site by sinner.
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