Exhaust System: Description and Operation

Exhaust System

The exhaust system consists of:

Partial Zero Emissions Vehicle (PZEV)
- a one-piece catalytic converter manifold.
- an exhaust flexible pipe.
- a resonator.
- a muffler and tailpipe assembly with isolators bolted to the body.

Non-Partial Zero Emissions Vehicle (PZEV)
- a one-piece catalytic converter manifold with exhaust flexible pipe.
- a resonator.
- a muffler and tailpipe assembly with isolators bolted to the body.

NOTE: The production muffler and tailpipe assembly is one-piece construction. The service muffler and tailpipe is 3-piece construction for PZEV and 2-piece construction for non-PZEV.

The exhaust system provides an exit for exhaust gases and reduces engine noise by passing exhaust gases through the catalytic converter, a muffler assembly and resonator. Rubber exhaust hanger isolators attach the exhaust system to the mounting hooks.


Catalytic Converter

The catalytic converter plays a major role in the emission control system. The catalytic converter works as a gas reactor. The catalytic converter's function is to speed up the heat-producing chemical reaction between components of the exhaust gases in order to reduce the air pollutants. Because of the high temperatures at which the catalytic converter operates, the vehicle body areas around the catalytic converter are protected by heat shields. The catalytic converter controls 3 emissions: Hydrocarbon (HC), Carbon Monoxide (CO) and Nitrogen Oxides (NOX).