Exhaust System: Description and Operation

DESCRIPTION - SRT





A thin-wall air-gap insulated exhaust pipe leads to the three-way catalytic converter, which has an air-gap insulated housing. The air-gap insulation, whereby a steel shell is wrapped around the component, limits heat loss to hasten the catalytic converter action. The insulation also minimizes the need for insulation to protect the passenger compartment from excessive temperatures.





A large - 812 cubic inch (13.3 L) - muffler is tuned to produce a sporty tone that meets pass-by noise levels in all markets. The rear-mounted muffler terminates in dual bright exhaust tips.

OPERATION
The exhaust emission control system is calibrated to meet ULEV I emission standards in California, Tier 2, BIN 8 emission standards in other U.S. states and Stage IV emission standards in Europe. The engine control computer and other hardware are the same for all markets, but there is some difference in the software depending on local emissions requirements. Dual ignition reduces hydrocarbon emissions (unburned fuel) released by the engine to the catalytic converter by 20 percent compared to single ignition systems. This reduction is especially beneficial during the cold start and warm up phases of operation, which is when a majority of the tailpipe emissions occur on today's cars because the catalytic converter has not yet reached its operating temperature. The exhaust system channels exhaust gases from the engine and away from the vehicle.