LR3/Disco 3
Each outlet pipe terminates in a welded joint with the tail silencers. The outlet pipes have a hanger bar which provides for
the location of a mounting rubber.
A hanger bar is welded to the front face of each rear silencer and provides for the location of a mounting rubber. The
silencer is a circular fabrication with a baffle tube which is surrounded with glass fibre to provide further noise
suppression. Each silencer has a capacity of 2.7 litres (165 in
3
).
The silencers each have an outlet pipe which is 55 mm (2.2 in) diameter, with a wall thickness of 1.2 mm (0.05 in). Each
outlet pipe is curved downwards to direct exhaust gasses away from the rear of the vehicle.
CATALYTIC CONVERTER
The engine management system provides accurately metered quantities of fuel to the combustion chambers to ensure
the most efficient use of fuel and to minimise the exhaust emissions.
To further reduce the carbon monoxide and hydrocarbons content of the exhaust gases, a catalytic converter is integrated
into the front pipe of the exhaust system. In the catalytic converter the exhaust gases are passed through honeycombed
ceramic elements coated with a special surface treatment called 'washcoat'. The washcoat increases the surface area of
the ceramic elements by a factor of approximately 7000. On top of the washcoat is a coating containing metals, which are
the active constituent for converting harmful emissions into inert by-products. The metals add oxygen to the carbon
monoxide and the hydrocarbons in the exhaust gases, to convert them into carbon dioxide and water respectively.
