Hyundai Sonata: Description and Operation
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 [Multiport Fuel Injection (MFI) System]
The MFI 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 MFI 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.
|
Catalytic Converter. Description and Operation
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:
Components and Components Location
Components Location
1. PCV Valve
2. Canister
3. Purge Control Solenoid Valve (PCSV)
4. Fuel Tank Pressure Sensor (FTPS)
5. Canister Close Valve (CCV)
6. Fuel ...
Telemetics Unit (TMU). Repair procedures
Removal
1.
Remove the audio monitor (or AVN head unit) after loosening the
mounting screws.
(Refer to the BE group - "Audio Unit" or "AVN Unit" ...
Operating door locks from outside the vehicle
Turn the key toward the rear of the vehicle to unlock and toward the front
of the vehicle to lock.
If you lock the door with a key, all vehicle doors will lock automatically.
From the driv ...
