The exhaust system ensures the removal of exhaust gases into the atmosphere, reducing the concentration of pollutants, reducing engine noise to the required level with minimal engine power loss. In order for the exhaust system to perform its functions, it must be in good condition. The condition of the exhaust system also affects engine power and fuel consumption.
The exhaust system consists of a turbocharger (only TDI diesel engine and 150 hp petrol engine.) exhaust manifold, catalytic converter, exhaust pipe and mufflers. All-wheel drive vehicles with V6 engines have two exhaust pipes and two catalysts. The rest of the four-wheel drive vehicles are equipped with two rear mufflers.
The middle and rear mufflers are welded together and installed as one piece. Despite this, the silencers can be replaced individually.
Exhaust pipes provide connections between the elements of the exhaust system.
Silencers are designed to smooth out pulsations in the exhaust gas flow and reduce noise levels. Silencers work based on two physical effects - resonance and sound absorption. Silencers usually use a combination of these effects.
Resonant silencers consist of chambers of various lengths connected by pipes. The difference in the cross-sectional areas of the pipes and chambers, the change in the direction of the exhaust gas flow and the presence of resonators together with the connecting pipes and chambers ensure optimum noise reduction, especially at low frequencies.
The exhaust system is attached to the bottom of the car using elastic elements to reduce vibration from the passage of exhaust gases.
After working on the exhaust system, check that the system is installed freely, without stress and that there is sufficient clearance from the bodywork.
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