GF30.20-P-2020KE Component Description of Throttle Valve Actuator

GF30.20-P-2020KE Component Description Of Throttle Valve Actuator
- ENGINE 271.921 /944 /946 /948 up to Model Year 8
- ENGINE 271.940 in MODEL 203 up to Model Year 8
- ENGINE 271.940 in MODEL 209.342 /442
- ENGINE 271.941 /955 /956

Location





M16/6 Throttle valve actuator

The throttle valve actuator is located at the front left of the engine.

Task
The throttle valve actuator regulates the functions:
- Idle speed
- Driving mode (according to the accelerator pedal position and engine load)
- Cruise control mode
- Electronic accelerator emergency mode

Design





1 Throttle valve
2 Spring capsule
3 Mechanical stop
4 Actuator motor transmission
5 Setting shaft throttle valve
M16/6m1 Actuator motor
M16/6r3 Actual value potentiometer (sliding contact 1)
M16/6r4 Actual value potentiometer (sliding contact 2)

Function





1 Pin 1 Actuator motor ground
2 Pin 2 Potentiometer ground
3 Pin 3 Potentiometer voltage
4 Pin 4 Actuator motor voltage
5 Pin 5 Signal potentiometer 2
6 Pin 6 Signal potentiometer 1
M16/6 Throttle valve actuator
M16/6m1 Actuator motor
M16/6r3 Actual value potentiometer (sliding contact 1)
M16/6r4 Actual value potentiometer (sliding contact 2)

The actuator motor in the throttle valve actuator adjusts the opening angle of the throttle valve continuously from approx. 0 to 90° according to the presets from the ME control unit (N3/10).
Hereby, both the actual value potentiometers indicate the current position of the throttle valve to the ME control unit.

In deenergized status (e.g limp-home), the opening angle of the throttle valve (from 10 to 12°) is determined by the e spring capsule.

When the throttle valve actuator is connected to the vehicle for the first time, the ME control unit carries out an adaptation of the actuator (learning the lower and upper mechanical end stop of the throttle valve) on its own.