Purge control valve - Description of components - GF47.30-P-2020BK

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 219 with ENGINE 113.967

MODEL 164.1 with ENGINE 113.964

MODEL 251 with ENGINE 113.971

Shows model 219

Fig 1: Identifying Purge Control Valve

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The purge control valve is located in the engine compartment.

Task

Opening or closing the connection line between the activated charcoal canister and the intake manifold (purge line).

Design

Electric switchover valve with two line terminals and one 2-pin plug connection.

Fig 2: Identifying Purge Control Valve

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function

The purge control valve is actuated on the ground side by the ME control unit, according to the operating conditions of the engine and the load status of the activated carbon canister, with a PWM signal (duty cycle 0 to 100 %).

The voltage supply is performed via circuit 87.

If purging is released, the purge control valve pulses audibly and perceptibly.

At the same time the passage for the purge line from the activated charcoal canister to the intake manifold is opened or closed.

The purge control switchover valve is opened and closed to check for leakage in the purge system. It also detects if the purge control valve jams in open condition.

Fig 3: Identifying Purge Control Valve And Fluid Reservoir With Intake Manifold

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

To suppress pulse noise, a fluid reservoir is located upstream of the purge switchover valve.

The pulse switchover valve is designed for a larger flow volume (color coding).