Hyundai Sonata: Exhaust Emission Control System / Description and Operation
Hyundai Sonata LF 2014-2019 Service Manual / Emission Control System / Exhaust Emission Control System / 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 programmed into the ECM. |
| 2. |
Closed Loop air/fuel ratio is 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).
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Other information:
Hyundai Sonata LF 2014-2019 Owners Manual: Sunroof
If your vehicle is equipped with a sunroof, you can slide or tilt your sunroof
with the sunroof control switch located on the overhead console.
The sunroof can only be opened, closed, or tilted when the ignition switch is
in the ON position.
The sunroof can be operated for approximately 30 second ...
Hyundai Sonata LF 2014-2019 Owners Manual: Air Cleaner
Filter Replacement
The air cleaner filter can be cleaned for inspection using compressed air. Do
not attempt to wash or to rinse it, as water will damage the filter. If soiled,
the air cleaner filter must be replaced.
1. Remove the air cleaner filter cover.
2. Wipe the inside of the air cleaner. ...
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