|
| |
| In order
to meet Federal Exhaust Emission and Fuel Economy regulations, today's
vehicles are equipped with highly sophisticated electronic engine control
systems. These systems do not require periodic adjustments. The only services
required on a scheduled basis are spark plug and filter replacement. Tune-ups,
as we knew them, are no longer necessary. |
| |
| Engine
Control Computer |
The
computer receives information from a network of sensors and switches that
convert engine operating conditions into electrical signals. Based on the
information and instructions stored in the computer program, commands are
then sent to three primary systems:
-
Ignition System
-
Fuel System
-
Emission Control System
|
| |
| The
sensors that monitor one or more of these systems include: |
| |
 |
 |
Mass
Airflow Sensor |
| |
 |
Throttle Position
Sensor |
| |
 |
Manifold Absolute
Pressure Sensor |
| |
 |
Coolant Temperature
Sensor |
| |
 |
Exhaust Oxygen
Sensor |
| |
 |
Crankshaft Position
Sensor |
| |
 |
Camshaft Position
Sensor |
| |
|
|
| |
|
Back
to Top |
Back
to Education |
| |
|
|
© 2001
CL Auto Pte Ltd| Site Designed By Rambus
|
