Automobile Engineering in ME
A three way catalytic converter

Burns fuel vapour gases
Re-circulates exhaust gases
Removes CO, HC, and NO₂ from the exhaust gases passing through it
Reduces N₂, H₂O, and CO₂ emission levels

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Automobile Engineering in ME
The auto ignition in a spark ignition engine means

Ignition of the charge before the passage of flame front
Automatic ignition of the charge at the end of compression
Ignition induced by the passage of a spark
Ignition induced to supplement the process of normal combustion

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Automobile Engineering in ME
The basic purpose of a four wheel drive (4WD) system is that it

Delivers improved cornering on dry road surfaces
Ensures that effective braking can be performed, even on slippery surfaces
Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
Eliminates the need of snow tyres, tyre chains, etc.

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