Mechanical adjusting movement activation device i.e. pyrotechnic tripping device, for e.g. rollover protection system, in motor vehicle, has piston moved from resting to action position when cylinder is loaded with fluid pressurizing medium

摘要

#CMT# #/CMT# The device has a guiding cylinder (3), and a piston (4) moved in the guiding cylinder from a resting position into an action position by expanding reaction gases of an actuator (1). A guiding cylinder (6) is provided with a controlling piston (7), where the piston (4) is moved from the resting position to the action position by the piston (7) when the guiding cylinder (6) is loaded with a fluid pressurizing medium. The guiding cylinder (6) is arranged behind the guiding cylinder (3), and divided into an ignition chamber (2) and a test chamber (8) with a pressure medium connection (9). #CMT#USE : #/CMT# Mechanical adjusting movement activation device i.e. pyrotechnic tripping device, for activation of a mechanical adjusting movement for rollover protection system and an active engine bonnet in a motor vehicle (all claimed) by a pyrotechnical actuator. #CMT#ADVANTAGE : #/CMT# The piston is moved from the resting position to the action position by another piston when the guiding cylinder is loaded with a fluid pressurizing medium in such a manner that the device checks the connections of the mechanical parts of the vehicle for multiple times without igniting the pyrotechnic actuator, thus eliminating the need to test functional efficiency of the actuator. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic side view of a pyrotechnic actuator in a resting position. 1 : Actuator 2 : Ignition chamber 3, 6 : Guiding cylinders 4, 7 : Pistons 8 : Test chamber 9 : Pressure medium connection.