Description
Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine
modifications and the addition of special control components.
Modifications to the combustion chamber, intake manifold, camshaft and
ignition system form the basic control system.
These items have been integrated into a highly effective system which
controls exhaust emissions while maintaining good drivability and fuel economy.
Air/Fuel Mixture Control System [Gasoline Direct Injection (GDI) System]
The GDI system uses signals from the heated oxygen sensor to activate
and control the injector installed in the manifold for each cylinder, thus precisely
regulating the air/fuel mixture ratio and reducing emissions.
This in turn allows the engine to produce exhaust gas of the proper composition
to permit the use of a three way catalyst. The three way catalyst is designed
to convert the three pollutants [hydrocarbons (HC), carbon monoxide (CO), and
oxides of nitrogen (NOx)] into harmless substances. There are two operating
modes in the GDI system.
1. |
Open Loop air/fuel ratio is controlled by information pre-programmed
into the ECM.
|
2. |
Closed Loop air/fuel ratio is constantly adjusted by the ECM based
on information supplied by the oxygen sensor.
|
Description
The catalytic converter of the gasoline engine is a three way catalyst.
It oxidizes carbon monoxide and hydrocarbons (HC), and separates oxygen from
the oxides of nitrogen (NOx). ...
See also:
SRS Control Module (SRSCM). Repair procedures
Removal
1.
Remove the ignition key from the vehicle.
2.
Disconnect the battery negative cable and wait for at least three
minutes before b ...
Snow tires
If you equip your car with snow tires, they should be the same size and have
the same load capacity as the original tires. Snow tires should be installed on
all four wheels; otherwise, poor handli ...
Knock Sensor (KS). Schematic Diagrams
Circuit Diagram
...