ARIA

ENGINE

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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.