Description

DESCRIPTION

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

The exhaust gas leading from the cylinder heads converges through the manifolds (1) in the first section of the exhaust piping (3) on which there are two flexible pieces which restrict the transmission of vibration. 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 injection time can be adjusted 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 connection between the various sections of exhaust pipe is by flanges with seals in between and connection to the body is by brackets with flexible mounts.

The very high amount of heat radiated towards the body owing to the presence of the catalytic converter is limited by a series of heat guards between the exhaust pipe and the body.