Overview
Exhaust system
45
Introduction of the smart fortwo, Model Series 451
Design
The exhaust system is made of stainless steel and
consists of the following components:
• Exhaust manifold
• Catalytic converter
• Main muffler
Muffler system
When designing the muffler systems, it was important
both to minimize the exhaust back pressure and
achieve optimum acoustic tuning. The muffler system
is rigidly fixed to the vehicle body.
Exhaust aftertreatment
A control sensor and a diagnostic sensor are installed
for exhaust aftertreatment.
Aftertreatment of the exhaust gases is performed by
a catalytic converter with monolithic coating.
P49.00-2109-00
Exhaust system
1 Exhaust manifold
2 Catalytic converter
3 Main muffler
G3/1 O2 sensor downstream of TWC [KAT]
G3/2 O2 sensor upstream of TWC [KAT]
SN_Typ 451_us.book Seite 45 Freitag, 30. November 2007 1:56 13
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