Engine management system - V8 (IAT output): Description and operation (page 3 of 3)

Air intake duct – Gulf models from 2000MY

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1 Heat reflective insulation 2 Supplementary air intake duct

The density of the intake air is partly dependent on altitude and temperature. Hot air has a lower density than cold air; consequently in hot climates, the low air density can result in low power due to low volumetric efficiency.

In order to improve engine performance, Gulf specification models from 2000MY have a secondary air intake duct which is located under the front left inner wing of the vehicle. Cooler air from the side of the vehicle is routed through the duct to the air cleaner, where it combines with air entering via the front grille.

In addition to the secondary air duct, the vehicles are fitted with a larger front grille and have larger cooling and condenser fans.

The MAF/IAT sensor, air cleaner and air cleaner duct are encased in insulation bags to help keep the intake air cool and so increase the mass of air entering the engine intake manifold.

The air cleaner includes a cyclone filter and also a dump valve in the bottom of the unit. Sand and dust particles which are carried into the air cleaner with the air flow are automatically expunged via the dump valve.