Hyundai Azera: Description and Operation
Fifth generation HG (2011–2024) / Hyundai Azera 2011-2024 Service Manual / Emission Control System / Exhaust Emission Control System / Description and Operation
Fifth generation HG (2011–2024) / Hyundai Azera 2011-2024 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). ...
See also:
Good driving practices
Never move the shift lever from P (Park) or N (Neutral) to any other position
with the accelerator pedal depressed.
Never move the shift lever into P (Park) when the vehicle is in motion.
Be ...
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 handling ...
Battery replacement
A smart key battery should last for several years, but if the smart key is not
working properly, try replacing the battery with a new one. If you are unsure how
to use your smart key or replace the ...
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