Chrysler laser 1990 Technical Information Manual page 383

EMISSION CONTROL SYSTEMS
The catalytic converter is installed on the middle of
the exhaust pipe under the floor.
This catalytic converter uses a monolithic type
catalyst with a honeycomb structure that has its
surface coated with catalytic components. The
catalyst is supported by a stainless steel wire mesh
Exhaust air
Stainless steei shell
and surrounded by a stainless steel shell.
The catalytic converter oxidizes carbon monoxide
and hydrocarbon, and reduces oxides of nitrogen.
which are present in the exhaust gas, in order to
minimize their emission levels.
Stainless steel wire mesh
Cover
The MPI system is a system which employs the signals from
the oxygen sensor to activate and control the injector installed
at the each cylinder head thus precisely regulating the air-fuel
mixture ratio and reducing emissions,
This in turn allows the engine to produce exhaust gases of the
proper composition to permit the use of a three-way catalytic
converter. The three-way catalytic converter is designed to
convert the three pollutants (1) hydrocarbons (HC), (2) carbon
monoxide (CO), and (3) oxides of Nitrogen (NOx) into harmiess
substances.
There are two operating modes in the MPI system:
Air-fuel ratio is controlled by information programmed into
the engine control unit at manufacture.
Air-fuel ratio is varied by the engine control unit based on
information supplied by the oxygen sensor.
NOTE
For detailed information concerning the MPI system, refer
to Fuel System.