Windows: Testing and Inspection
FUNCTION OF SAFETY POWER WINDOWWhen driver door power window auto-up switch is operated, safety function is activated.
1. Safety function condition
When detect the force of 100 N (using the 10 N/mm spring) during the window rising, window is reversed.
2. Length of window reversing (except holding the auto-up switch)
- When detect the jamming during the 4 mm - 250 mm from top of the door.
-> Window is reversed until 300 mm from top of the door.
- When top of detect the jamming over the 250 mm from the door.
-> Window is reversed until 50 mm from jamming position.
3. Length of window reversing (holding the auto-up switch)
- When detect the jamming during holding the auto-up switch.
-> Window is reverse until 25 mm from jamming position.
- Auto-up function is not available during the 5 seconds from above condition.
-> When holding the auto-up switch, window is operated as a manual-up function. (Safety function is not activated.)
- When holding the auto-up switch after 5 seconds from above condition.
-> Window is reverse until 25 mm from jamming position.
4. Safety function is not available area Safety function is not available during the 4mm from top of the door.
INITIALIZING METHOD OF THE SAFETY POWER WINDOW
1. Initializing of Battery Connection
When the battery is not connected after disconnecting the battery, safety power window switch need the initializing.
1. Power window operation before initializing
- Manual-Up/Safety function is available
- Auto-Up function is not available
(When holding the auto-up/down switch, window is operated as a manual-up/down.)
2. Initializing method
Close the window in window open position, and holding the switch in window full close position over the 0.2 second.
(If start the closing the window in window full close position, initializing could be failed.)
3. If initialize the safety power window in jamming status, could occur below conditions.
- Safety function is not available
4. Position control
To detect the window position and direction of motor rotation, hall sensors are employed. ECU recognizes the fully closed position of the window and sets this relative window position value as "0". When the window goes downwards, based on the information from the hall sensor, the relative position value increments. On the contrary, when the window goes upwards, it decrements.
NOTE: Motor position is only valid if the system stays in normalized state. (see initialization force limitation).
5. Recall and storing the normalization information ECU records the normalization information into the specified location in Flash ROM. (as long as Flash ROM page is valid)
- Storing conditions: 1 second after the motor stops
- Recall conditions:
- Engine = on OR
- Power On Reset
6. Switch signal filtering
Debouncing time: 14 ms
T1, t2 and t3: Measured with signal that debouncing is done. In case T1 > 6 ms, motor shall operate. In case T2 > 22 ms, motor might operate in manual mode.
When Auto up switch input is active, auto up mode is active till 300 ms. After this and until switch is released, panic mode is enable. In the end when the switch is released, auto up mode is enabled again.
The conditions for terminating the motor control by the (Semi) Auto Up/Down or Manual Up/Down:
- Out of the operation voltage range OR
- Thermal protection ON OR
- Anti-pinch function OR
- De-normalization OR
- Engine = OFF OR
- Other key input occurs
2. Thermal protection
Software provides an algorithm in order to prevent the motor from thermal overheating under the specified conditions like the valid Flash ROM Data.
After power on reset, the software thermal counter starts to count from the initial value. In case of motor running, software increases the thermal counter by using the motor heating characteristic, otherwise the thermal counter decreases by using the motor cooling characteristic.
There exist 2 thermal protection limits. if the software thermal counter is over the first limit, the motor movement stops until the software thermal counter decrease to the release limit temperature value, but still allows the current movement to finish. If the software thermal counter is over the second limit (while motor running), the movement stops at once until the release temperature value is reached (reversing will not be interrupted by software thermal protection).
The motor is able to continue to operate at least "15" cycles without a break under the above conditions and after thermal protection is activated, the motor turns to the operational condition within "35 ± 5" seconds. Test starts with SW-thermal counter at the initial value.
Cycle: Full closed -> 1 sec. rest -> Full opened -> 1 sec. rest