ARIA

ENGINE 143 2.1.8.1.2 COMPONENTS 1. CLOSE COUPLED CATALYTIC CONVERTER The Close Coupled Catalytic Converter is a critical element of the system used to reduce vehicle ex- haust emissions. The catalytically active element within the converter lowers the activation energy needed to selectively transform harmful combustion products into less harmful gases. The catalyst be- comes active when it reaches a threshold temperature. Close coupled Catalytic Converter is physically po- sitioned very close to the engine exhaust ports to enable quicker light-off. It also enables flushing out of the carbon particles present in the Catalytic Con- verter. BENEFITS • Positioned close to the engine exhaust ports for fast light-off and reduced cold start emissions • Robust construction offers excellent durability. • Internally insulated construction design enables improved durability, reduced heat rejection and lower noise. 2. SILENCER The function of silencer is to reduce exhaust noise. The silencers are divided into three main groups. i) Pre-silencer ii) Main silencer iii) Post silencer The main function of the silencer is to reduce the amount of noise emitted by the engine exhaust gases flow. It typically makes use of the change in the cross sectional area which can be made as a chamber to filter or reduce the sound waves which the engine produces. The silencer is typically installed along the exhaust pipe as part of the exhaust system of the engine. It has a resonating chamber, which is specifically de- signed such that opposite sound waves collide to cancel each other out. 3. EXHAUST MANIFOLD The exhaust manifold has a precisely machined hole through which the exhaust gases are tapped out.