Turbocharger - Vehicles With Ingenium I4 2.0L Diesel 163Ps And 180Ps Engines

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

The turbocharger equipped with a Variable Geometry Turbine (VGT) is an exhaust-driven centrifugal air compressor which increases power output by supplying compressed air to the engine. The VGT wheel extracts energy from engine exhaust gases to drive the compressor wheel.

The compressor wheel draws in ambient air through the air intake system which is compressed and delivered through a charge air cooler to the throttle body.

The air intake to the VGT receives air from the Exhaust Gas Recirculation (EGR) system. For additional information, refer to: Engine Emission Control .

By turbocharging the engine, the pressure and density of the air entering the cylinders is increased and therefore so is the amount of oxygen. This enables a greater quantity of fuel to be injected, thus increasing the engine's power output and the ability to maintain power at higher altitudes.

The internal components are oil cooled. Engine oil is circulated through the bearing housing which acts as a heat barrier between the "hot" turbine and the "cold" compressor. The bearing is a semi-floating journal bearing type and is lubricated by engine oil. Oil is circulated to the turbocharger bearing housing and returned to the oil pan through an oil drain to the cylinder block.

The charge air cooler (air to water type) is used to increase the density of air as it flows from the turbocharger compressor to the intake manifold. Compression of the charge air by the turbocharger raises the temperature of the air, decreasing the charge air density. Consequently less oxygen is able to enter the cylinders, reducing the engines power. To overcome this, the air is routed through the charge air cooler before it enters the engine. The temperature is reduced by transferring the heat to the vehicle low temperature cooling system. Cooling of the intake air also helps to reduce engine emissions by limiting nitrogen oxides (NOx) production. For additional information, refer to: Intake Air Distribution and Filtering - INGENIUM I4 2.0L Diesel .