gf9160p2011fl

Deploying of pyrofuse, function

Type gf · topic 91.60 · version 0103 · 2012-12-25

Applies to: MODEL 212 Low-voltage pyrofuse

Where it sits

Function group 3 Body › 91 Seats, bunks, restraint systems › 91.60 Airbag, pedestrian protection — Series 212

GF91.60-P-2011FL

Deploying of pyrofuse, function

4.12.12

MODEL

212

Low-voltage pyrofuse

Function requirements, general

Circuit 15R ON

The status of circuit 15 is sent by the electronic ignition lock control unit (N73) up to 28.2.13 via chassis CAN (CAN E) or as of 1.3.13 via chassis CAN 1 (CAN E1) to the supplemental restraint system control unit (N2/10).

Deploying a pyrofuse, general

To avoid any possible fire hazard following a crash event, it is necessary to disconnect the starter (M1) and alternator (G2) quickly and reliably from the on-board electrical system.

Deploying of pyrofuse, function

Function sequence for triggering the pyrofuse
The central line to the starter and to the alternator is designed as busbar with predetermined fracture point (3) inside the pyrofuse housing. When a crash event occurs, the pyrofuse 150 (F32f150) in the front prefuse box (F32) is actuated directly by the supplemental restraint system control unit. When the pyrofuse is actuated, pressure builds up in the chamber (1). The piston (2) then moves against the predetermined fracture point disconnecting the bus bar.

Time sequence:
Piston movement starts after t = 300 μs
Line rail disconnection is finished after t = 450 μs.

P91.60-3611-71

Overview of system components for supplemental restraint system

GF91.60-P-9996FL

Referenced documents