Throttle valve actuator, component description - GF30.20-P-2020P

ENGINES 10 642.886 in MODEL 463.306/336/346 as of model year 2011/YoM

ENGINES 642 in MODEL 164.8, 251.1, 164.1, 221.0, 251.0, 203.2/0, 221.1 up to Model Year 2008/YoM 07

ENGINES 642 in MODEL 211.0, 209.4, 211.6/2, 219.3, 209.3

ENGINES 642.970 in MODEL 463.303/340/341

Fig 1: Locating Throttle Valve Actuator

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The throttle valve actuator is located on the engine at the right front.

Task

The throttle valve actuator regulates the fresh air quantity and mixes the recirculated exhaust with fresh air.

Function

The throttle valve actuator is actuated by the CDI control unit (N3/9) over a pulse width modulation signal and controls the fresh air quantity via the installed throttle valve.

Through connection of the exhaust gas recirculation with the mixing throttle, the suctioned fresh air is mixed with the recirculated exhaust.