Hyundai Santa Fe (DM): 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). [WCC] [UCC] ...
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Cluster Fascia Panel. Repair procedures
Replacement • Put on gloves to protect your hands. • When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage. • ...
Rear Shock Absorber. Repair procedures
Removal 2WD 1. Remove the rear wheel and tire (A) from rear hub . Tightening torque: 88.2 ~ 107.8 N.m (9.0 ~ 11.0 kgf.m, 65.0 ~ 79.5 lb-ft) Be careful not to damage to the hub bolts when removing the rear ...
SS-A Solenoid Valve(ON/OFF). Specifications
Specifications ON/OFF Solenoid Valve(SS-A) ▷ Control type : Normal low type Control pressure kpa (kgf/cm², psi) 490.33(5.0, 71.12) Internal resistance(Ω) 10~11 ...
