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Home >> Land Rover >> 2014 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Electronic Engine Controls - TDV6 3.0L Diesel -- Range Rover/L405) >> Electronic Engine Controls - TDV6 3.0L Diesel >> Electronic Engine Controls (Description And Operation) >> Description And Operation >> Description >> Variable Geometry Turbocharger Vane Actuator

Variable Geometry Turbocharger Vane Actuator

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
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The Variable Geometry Turbocharger (VGT) is attached to the exhaust manifold and secured to three studs on a flange on the manifold with nuts.

An integral bracket houses the VGT vane actuator. The VGT vane actuator is connected to an eccentric lever which moves the turbine housing to adjust the position of the vanes. When the actuator operates a boss is rotated, which in turn moves the lever and changes rotary motion into linear motion. The lever is connected to a rod attached to the outside of the turbine housing and the linear motion is converted back to rotary motion of the housing.

Operation of the VGT vane actuator is controlled by the Powertrain Control Module (PCM). The VGT vane actuator also provides the PCM with a feedback signal to determine the pitch angle of the vanes.

The variable vanes in the turbocharger improve the exhaust gas power transfer to the turbine wheel which in turn drives the compressor wheel. This greatly assists the increase in charge air pressure at low engine speeds.

For additional information, refer to: TURBOCHARGER

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