Description

DESCRIPTION

1. Exhaust manifold
2. Seal
3. Front section
4. Lambda sensor
5. Catalytic converter
6. Flexible support
7. Seal ring
8. Centre silencer
9. Rear section - silencers
10. Support bracket

The exhaust gas leading from the cylinder head flows through the manifolds (1), to the front section of the exhaust piping (3) on which there are two flexible pieces which enable the limitation of vibrations. From the front section, the exhaust gas reaches the three-way catalytic converter (5) where most of the polluting substances are transformed.

At the beginning of the catalytic converter there is the lambda sensor (4) which informs the control unit of the amount of oxygen contained in the exhaust gas so that the injection time can be adjusted accordingly to keep the stoichiometric ratio (air-fuel) at an optimum level.

The exhaust gas leaves the catalytic converter and crosses three special silencers (8 - 9). The various sections of the exhaust piping are connected by flanges with interposed seals and support to the underbody is by brackets with flexible supports. The high amount of heat radiated towards the body due to the catalytic converter is limited by a set of heat shields between the exhaust piping and the body itself.