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Home >> Land Rover >> 2017 >> Discovery Sport SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Electronic Engine Controls - INGENIUM I4 2.0L Petrol -- Discovery Sport/L550) >> Electronic Engine Controls - INGENIUM I4 2.0L Petrol >> Description And Operation >> Description >> Purge Valve

Purge Valve

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.
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The purge valve is located on the front side of the engine. The purge valve is a solenoid operated valve which is closed when de-energized.

The purge valve is controlled by the Powertrain Control Module (PCM). The purge valve is operated when the engine operating conditions are correct to allow purging of the Evaporative Emission (EVAP) canister.

The purge valve is operated at 10 Hz by a Pulse Width Modulation (PWM) control ground from the PCM. The purge valve receives a fused power supply from the Battery Junction Box (BJB). The valve operates at a duty cycle of between 7% and 100%.

Atmospheric pressure in the EVAP canister is higher than the pressure at the turbocharger inlet under all throttle settings and engine running conditions. This pressure differential allows vapor to be drawn from the EVAP, through the open purge valve and into the turbocharger air intake.

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