GF91.59-P-0001R Roll Bar (RB) Function

GF91.59-P-0001R Roll Bar (RB) Function

Component Identification:

The roll bar protects the passengers from serious injury if an accident occurs (vehicle rollover).

The roll bar system essentially consists of the following components/assemblies:
^ RVC control module (N52)
^ Roll bar switch (N72s17)
^ Top/bottom roll bar limit switch (S83/10)
^ Roll bar deployment solenoid (Y57/1)
^ RVC hydraulic unit (A7/5)
^ RVC valve block (Y55/1)
^ Main valve (Y55/1y1)
^ Roll bar up solenoid valve (Y55/1y2)
^ Hydraulic cylinder for moving roll bar in and out at right support.
^ Spring with integrated oil damper at left support

The roll bar is:
^ automatically raised (spring power) if there is a risk of an accident (crash deployment),
^ manually raised and lowered by operating the roll bar switch (N72s17) (manual operation).

All roll bar functions are controlled by the RVC control module (N52). In order to monitor the operation and indicate the status of the

system, a malfunction indicator lamp is integrated in the instrument cluster (A1).

When manual operation occurs, the roll bar hydraulic cylinder generates the power that is required to raise and lower the roll bar. The motor (A7/5m1) of the hydraulic unit (A7/5) generates the required system pressure.

If crash deployment occurs, a pre-tensioned spring assembly provides the power that is required to raise the roll bar. The roll bar hydraulic system behaves passively in this case in order to guarantee that the required deployment speed is achieved.

The raising movement is braked by the oil damper in the upper area.

If the Vario roof is operated and there are currently faults in the roll bar sensor or deployment branch, the roll bar is always hydraulically raised after the Vario roof has been locked in its final position.

Crash deployment has priority over manual operation, i.e. crash deployment can also occur during manual operation.