GF83.10-P-2201RT | Actuator motors, component description | 23.5.05 |
MODEL 251.1 /0
with CODE (580) Automatic air conditioning
up to Model Year 8
P83.10-2527-07
M2/5 Fresh air/air recirculation flaps actuator motor
M2/6 Left blending air flap actuator
M2/7 Right blending air flap actuator
M2/21 Rear air distribution flap actuator motor
M2/22 Center outlet flap actuator motor
M2/12 Rear shutoff flap actuator motor
M2/15 Left and right footwell flaps actuator motor
M2/16 Left and right defroster flaps actuator motor
Location
The actuator motors are located in the A/C housing.
task
General determinations on actuator motor and flap controls
Continuous positioning of the flaps.
The following release function is realized for each flap in the automatic air conditioning to prevent the actuator motors from operating continuously in the controlled range.
Release function: Once a position has been adjusted, then until the next change, the blow air nominal temperature, for example, must change by so much that the release value going above or below it is either not reached or exceeded.
Final values are approached directly (0 %, 100 %).
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Anti-fogging function
The anti-fogging function prevents the windshield and side windows from fogging up after starting the engine by blowing the moist air, immediately after starting, into the vehicle footwell instead of against the windows.
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Center outlet flap actuator motor
The center outlet flap actuator motor actuates the air flaps for controlling the air flow to the center nozzle.
The center outlet flap actuator motor is actuated by the AAC control and operating unit (N22) depending on the air outlet temperature desired at the center nozzle.
Actuation for "Defrost" Center outlet flap 0 % (closed)
Actuation for "Rest" according to control
Actuation for "0" remain in previous condition
Actuation for ignition OFF remain in previous condition
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Automatic air flap control
The air flaps are opened according to a defined characteristic up to 100 % by the center outlet flap actuator motor, depending on the following values:
Blending air flap setting
Coolant temperature
Evaporator temperature
Footwell flap position
Air flap control via the center nozzle
In manual mode the air flap settings are determined by the selector on the center nozzle.
Left blending air flap actuator motor and right blending air flap actuator motor
The left and right blending air flap actuator motor serves for adjustment of the heating and air conditioning ventilation temperature.
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The left and right blending air flap actuator motors are actuated according to a defined characteristic by the AAC control and operating unit depending on the position of the temperature selector wheel and the actual interior temperature thereby moving the blending air flaps. The flaps open or close the air passage through the heater heat exchanger in order to mix heated and fresh or cooled air in the correct proportions required to achieve the desired interior temperature.
The set flap angle for the blending air flaps is determined by the ACC control and operating unit, depending on the following information:
regulated target temperature on the temperature selector wheel
the in-car temperature measured by the in-car temperature sensors
Coolant temperature
Blending air flaps closed No air through mixing chamber and therefore no air heating
Blending air flaps opened All air passes through the mixing chamber with maximum air heating
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Left and right defroster flaps actuator motor
The left and right defroster flaps actuator motors actuate the defroster vent flap for control of the air flow to the windshield defroster vents and side window defroster vents. The window defroster button on the AAC control and operating unit can be pressed to actuate the left and right defroster flaps actuator motors via LIN bus, thereby actuating the defroster vent flaps.
With "defrosting" and "0", the defroster vent flaps are 100% open.
Manual flap control
(12 o'clock partitioning through actuation of air distributor duct button)
1 o'clock 2 o'clock 3 o'clock 4 o'clock 5 o'clock 6 o'clock
100 % 100 % 100 % 67 % 21 % 0 %
7 o'clock 8 o'clock 9 o'clock 10 o'clock 11 o'clock 12 o'clock
0 % 0 % 0 % 23 % 65 % 100 %
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Automatic flap control
The defroster vent flaps are opened linearly up to 100 % depending on the following values:
Blending air flap setting
Coolant temperature
Evaporator temperature
Relative humidity
Left and right footwell flaps actuator motor
The left and right footwell flaps actuator motors actuate the footwell flaps for control of the air flow to the front and rear footwells.
When the air distribution buttons on the AAC control and operating unit are pressed, the left and right footwell flap actuation motors are actuated over the LIN bus, thereby actuating the footwell flaps, which can assume the following positions depending on the requirements:
Actuation for "Defrost" Footwell flaps 0 % (closed)
Actuation for "Rest" according to control
Actuation for "0" No change
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Manual flap control
(12 o'clock partitioning through actuation of air distributor duct button)
1 o'clock 2 o'clock 3 o'clock 4 o'clock 5 o'clock 6 o'clock
29% 72 % 100 % 100 % 100 % 100 %
7 o'clock 8 o'clock 9 o'clock 10 o'clock 11 o'clock 12 o'clock
54% 30 % 0 % 0 % 0 % 0 %
Automatic footwell flap control
The footwell flaps are opened linearly up to 100 %, depending on the following values:
Blending air flap setting
Coolant temperature
Evaporator temperature
Fresh air/air recirculation flaps actuator motor
The actuator motor facilitates the closing or opening of the fresh air supply by actuating the fresh air/air recirculation flaps.
The fresh and air recirculation flaps actuator motor is actuated by pressing the air recirculation switch (N22s2) on the AAC control and operating unit.
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In air recirculation mode, the recirculation flap is open and the fresh air flap is closed. Air is drawn out of the vehicle interior into the A/C housing by the blower.
In fresh air mode, the fresh air flap is open and the recirculated air flap is closed. Fresh air is drawn into the automatic air conditioning housing by the blower.
When the air recirculation switch is actuated manually, the system immediately switches to 100 % recirculated air for a limited time. This is displayed by the function LED. Time limit function:
after 30 min at outdoor temperatures above approx. 7 °C,
after 5 min at outside temperatures below approx. 7 °C,
after 5 min. with AC OFF.
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100 % automatic recirculated air is possible for 30 min after switching ON the ignition. After the time has elapsed, the system switches to 80 % recirculated air mode or fresh air mode, depending on the conditions.
If automatic recirculated air is required after engine ON, fresh air will be circulated initially for 30 seconds. Then, operation is first continued automatically with 80 % recirculated air and 10 s later, also with 100 % automatically recirculated air, depending on the requirement.
Tunnel function
Activation of the tunnel function:
Only possible where the recirculated air LED is not illuminated.
Actuation of the air recirculation switch for longer than 1.5 s
Reaction: fresh air and air recirculation flaps are driven into air recirculation position. Now the 4 windows and the tilting/sliding roof are closed in a staggered manner.
If the recirculated air LED is canceled manually or by the automatic timer, the fresh air and air recirculation flap goes to the fresh air position, however, the windows and sliding roof remain closed.
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Deactivation of tunnel function:
Only possible where the recirculated air LED is illuminated.
Actuation of the air recirculation switch for longer than 1.5 s
Reaction: Fresh air and air recirculation flaps are driven into fresh air position. Now the 4 windows and the tilting/sliding roof are opened in a staggered manner.
If the recirculated air LED is reset manually (actuation of air recirculation switch for less than 1.5 s), the fresh air and air recirculation flap is moved to the recirculated air position.
Special functions of the fresh air/air recirculation control:
The function AC OFF does not allow any automatic nor emissions-controlled recirculated air.
Only fresh air mode is possible in the defrosting function.
In the function "0" 100 % recirculated air applies.
Manual recirculated air is deleted after ignition OFF.
Manual or automatic recirculated air is possible in the "Rest" position.