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

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 203 with ENGINE 272.920

MODEL 211 with ENGINE 272.922

MODEL 203, 209 with ENGINE 272.940

MODEL 203 with ENGINE 272.941

MODEL 171 with ENGINE 272.942

MODEL 211 with ENGINE 272.943

MODEL 211 with ENGINE 272.944

MODEL 251 with ENGINE 272.945

MODEL 221 with ENGINE 272.946

MODEL 203, 209 with ENGINE 272.960

MODEL 171 with ENGINE 272.963

MODEL 211, 219 with ENGINE 272.964

MODEL 221 with ENGINE 272.965

MODEL 230 with ENGINE 272.966

MODEL 164, 251 with ENGINE 272.967

MODEL 203 with ENGINE 272.970

MODEL 211 with ENGINE 272.972

MODEL 221 with ENGINE 272.975

MODEL 221 with ENGINE 273.922

MODEL 164 with ENGINE 273.923

MODEL 221 with ENGINE 273.924

MODEL 164 with ENGINE 273.943

MODEL 211, 219 with ENGINE 273.960

MODEL 216, 221 with ENGINE 273.961

MODEL 211 with ENGINE 273.962

MODEL 164, 251 with ENGINE 273.963

MODEL 230 with ENGINE 273.965

MODEL 209 with ENGINE 273.967

MODEL 221 with ENGINE 273.968

Fig 1: Identifying Purge Control Valve - Shown On Model 211

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).

Fig 2: Identifying Purge Control Valve With Connection

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Design

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

Function

The purge control valve is actuated on the ground side by the motor electronics control unit, depending on operating condition of engine and on the vehicle load of the activated charcoal canister, at the ground end with a pulse width modulation 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 (a =>b) is opened and closed.

The purge control valve is opened and closed for the leak test of the regeneration system. It also detects if the purge control valve jams in open condition.

Fig 3: Identifying Fluid Reservoir And Purge Control Valve

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

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