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 brackets

The exhaust gas from the cylinder head converged in two double manifolds (1) connected below by a single flange. From these, via the front section of the exhaust pipe (3), it reaches the three-way catalytic converter (5) where most of the polluting substances are transformed.

On the front section of the exhaust pipe there is a flexible piece which limits the transmission of vibrations and allows the takeoff of exhaust gas upstream of the catalytic converter.

The lambda sensor (4) is fitted on the front section of the exhaust pipe at the inlet of the catalytic converter

and it informs the control unit of the oxygen content in the exhaust gas making it possible to adjust the injection time to keep stoichiometric ratio (air-fuel) at an optimum level.

The exhaust gas leaving the catalytic converter crosses three special silencers (8 - 9).

The various parts of the exhaust pipe are connected by flanges with interposed seals and they are supported at the underbody by flexible supports.

The very high amount of heat radiated to the body by the catalytic converter is limited by a set of heat shields between the exhaust pipe and the body itself.