GF91.60-P-2002GI | Deployment logic for ETRs with driver/front passenger airbags/side airbag function | 21.6.99 |
MODEL 163 as of 1.12.99
General
As the deployment strategies are subject to continual improvements, such as those arising, e.g. from recent knowledge in the area of accident research, the deployment strategies described below should be viewed as pointers only. For this reason, the following does not take an additional look at the characteristics of the new
2-stage airbags (driver and front passenger airbags as of 1.09.00).
As of 1.09.01 the left rear window airbag is deployed over the left rear window airbag initiator (R12/22) and the left right window airbag by the right rear window airbag initiator (R12/23) . Deployment is detected by the left side airbag and window airbag sensor (A53/1) and right side airbag and window airbag sensor (A54/1)
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In the event of a crash, the restraint systems control module (N2/7) follows a deployment strategy based on the following input parameters:
Triggering thresholds, which are exceeded in the event of a crash
(head-on collision, side collision or rear end collision)
The state of the driver, passenger and left/right rear seat belt buckle switches
Occupancy status of front passenger seat, detected by the passenger seat occupied and automatic child seat recognition sensor (B48)
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In the event of a head-on collision a differentiation is made between the two triggering thresholds. If the driver/passenger seat belt latch plate is not inserted into the respective buckle, airbag deployment occurs at the first triggering threshold. In addition, there are different deployment conditions for the driver and passenger sides of the vehicle.
With connected belt buckles the driver/front passenger airbags are deployed only after the second threshold is exceeded.
In the event of a non occupied front passenger seat the supplementary restraint system is not activated on the front passenger seat side.
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The status of a belt buckle does not influence side airbag deployment. In the event of a side collision, in which the triggering threshold is exceeded, the restraint systems control module (N2/7) deploys the front and rear side airbags on the affected side of the vehicle.
(Exception: If the front passenger seat is not occupied, the side airbag on the front passenger side does not deploy).
The emergency tensioning retractors (ETRs) for the driver, front passenger and left/right rear seats are only activated when the respective seat belts are buckled. Where a seat belt buckle switch is faulty (error case) the ETR is deployed in the event of an collision. Under the airbag deployment logic, the system assumes here that the seat is occupied by a non-belted passenger.
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Occupancy states detected by the passenger seat occupancy and child seat sensor (B48)
Seat Occupancy Sensor (SOS) Active:
Seat not occupied Passenger seat not occupied
Child seat without mounted transponder (weight less than 12 kg / 120 mm is not achieved)
Seat occupied: Front passenger seat occupied (weight of 12 kg / 120 mm is achieved)
In the event of a fault in the automatic child seat recognition sensor it is assumed that a child seat has been mounted regardless of the front passenger seat detection sensor. The front passenger seat airbag is not deployed in such an event.
Child Seat Sensor (ACSR) Active:
Child seat detected: Permissible, control-module coded MB child seat with transponder
Child seat not detected: No permissible MB-child seat with transponder
Permissible MB-child seat with transponder, but not control module-coded
Alignment incorrect: Permissible MB-child seat with transponder not correctly installed or defective (e.g. only one resonator detected)
The child seat detected signal superimposes the seat occupied
signal (provided that the child seat exceeds the weight of
12 kg over a 120 mm diameter circle)
Restraint systems control module (N2/7) | Driver's seat | Passenger seat | ||||||
Passenger seat occupied and child seat recognition sensor | ||||||||
Latch plate Belt buckle not inserted into buckle | Latch plate Belt buckle inserted into buckle | Latch plate Belt buckle not inserted into buckle Seat not occupied | Latch plate Belt buckle not inserted into buckle Seat occupied | Latch plate Belt buckle inserted into buckle Seat occupied | Latch plate Belt buckle inserted into buckle Child seat not detected or other fault | Latch plate Belt buckle inserted into buckle Child seat with transponder | ||
Head-on collision | Belt tensioner | does not deploy | does deploy | does not deploy | does not deploy | deploys deploy | deploys deploy | does deploy |
Driver | deploys deploy | does not deploy |
-- |
-- |
-- |
-- |
-- | |
Passenger side Airbag |
-- |
-- | does not deploy | does deploy | does not deploy | does not deploy | does not deploy | |
Head-on collision | Driver Airbag | Actual deploy | does deploy |
-- |
-- |
-- |
-- |
-- |
Passenger Airbag |
-- |
-- | does not deploy | has been deployed | does deploy | does not deploy | does not deploy | |
Side collision | Front side airbag LEFT as of 1.09.01 Window airbag LEFT |
deploys deploy |
does deploy |
-- |
-- |
-- |
-- |
-- |
Front side airbag Right as of 1.09.01 Window airbag Right |
-- |
-- |
does not deploy |
does deploy |
does deploy |
does deploy |
does deploy | |
Rear end collision | Emergency tensioning retractor | does not activated | deploys deploy | does not deploy | does not deploy | deploys deploy | deploys deploy | deploys deploy |
Restraint systems control module (N2/7) | Driver's seat | Passenger seat | |||||||
Latch plate not inserted into buckle | Latch plate inserted into buckle | Latch plate not inserted into buckle Seat not occupied | Latch plate not inserted into buckle Seat occupied: | Latch plate inserted into buckle Seat occupied: | Latch plate inserted into buckle Seat not occupied | Latch plate inserted inserted into buckle Child seat with trans- ponder detected | Latch plate inserted into buckle Child seat not detected or other error | ||
Side crash on driver's side | Driver side airbag as of 1.09.01 Window airbag LEFT |
does deploy |
does deploy |
-- |
-- |
-- |
-- |
-- |
-- |
Side crash Front passenger side | Passenger side airbag as of 1.09.01 Window airbag Right |
-- |
-- |
does not deploy |
does deploy |
does deploy |
does deploy |
does deploy |
does deploy |
Restraint systems control module (N2/7) | Left/right rear seats | ||
Crash situation | SRS components | Latch plate not inserted into buckle | Latch plate inserted into buckle |
Head-on collision | Belt tensioner | does not deploy | does deploy |
side airbag as of 1.09.01 Window airbag |
does not deploy |
does not deploy | |
Head-on collision | Belt tensioner | does not deploy | already deployed |
side airbag as of 1.09.01 Window airbag |
does not deploy |
does not deploy | |
Side collision | Belt tensioner | does not deploy | does not deploy |
when triggering threshold exceeded on the corresponding vehicle side |
side airbag as of 1.09.01 Window airbag |
does deploy |
does deploy |
Rear end crash triggering threshold exceeded | Belt tensioner | does not deploy | does deploy |
side airbag as of 1.09.01 Window airbag |
does not deploy |
does not deploy | |
Restraint systems control module (N2/7) |
Passenger seat | ||||
Airbag malfunction indicator and warning lamp (A1e15) | AIRBAG OFF indicator lamp (A1e56) |
Airbag | side airbag as of 1.09.01 Window airbag right | Belt tensioner | |
Front passenger seat not occupied | OFF | OFF | DEACTIVATED | DEACTIVATED | deactivated, where belt buckle not connected |
Passenger seat occupied by person | OFF | OFF | ACTIVATED | ACTIVATED | activated, where belt buckle connected |
Seat occupied recognition sensor faulty (child seat not detected) | ON | OFF | ACTIVATED | ACTIVATED | activated, where belt buckle connected |
Child seat incorrectly positioned | OFF | depending upon child seat | DEACTIVATED | depending upon child seat | depending upon child seat |
only one of the two transponders in the child seat detected | ON | ON | DEACTIVATED | depending upon child seat | depending upon child seat |
child seat shielding or interference signal detected | ON | ON | DEACTIVATED | depending upon child seat | depending upon child seat |
Error in electronic analysis system for seat occupancy and child seat sensor | ON | ON | DEACTIVATED | depending upon child seat | depending upon child seat |
Child seat positioned against direction of travel | OFF | depending upon child seat | DEACTIVATED | depending upon child seat | depending upon child seat |
Child seat positioned in direction of travel | OFF | depending upon child seat | depending upon child seat | depending upon child seat | depending upon child seat |
child seat model not programmed in airbag control module | ON | ON | Deployment strategy: Standard | Deployment strategy: Standard | Deployment strategy: Standard |
Deployment strategy not programmed | ON | ON | Deployment strategy: Standard | Deployment strategy: Standard | Deployment strategy: Standard |
Child seat recognition Control module coding faulty | ON | ON | DEACTIVATED | ACTIVATED | ACTIVATED |
Interference in automatic child seat recognition sensor communication between airbag control module and electronic analysis system seat occupied recognition sensor/ automatic child seat recognition sensor | ON | ON | DEACTIVATED | ACTIVATED | ACTIVATED |
Automatic child seat recognition faulty | ON | ON | DEACTIVATED | ACTIVATED | ACTIVATED |
Supplemental restraint system (SRS) - function | |||
Supplemental Restraint System (SRS) block diagram | up to 31.08.00 | ||
as of 1.09.00 | |||
as of 1.09.01 | |||
Supplemental Restraint System (SRS) - Location of components Driver/passenger airbags, emergency tensioning retractors and side airbags | |||
Activation of Airbag SRS Indicator and Warning Light - Function | |||
SRS airbag malfunction indicator lamp, location/purpose | |||
Seat occupied recognition system with child seat recognition, location/purpose/design/function | |||
Airbag OFF Indicator Light - Location/Task | |||
Seat belt buckle control switch, location/function | |||
Windowbag, location/purpose/design/function | as of 1.09.01 | ||
side airbag sensor, location/purpose | as of 1.09.01 |
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