Drive arrangement for a roll bar of motor vehicles
First Claim
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1. A drive arrangement for a motor vehicle roll bar, comprising:
- at least one piston-cylinder means including a support piston, guide cylinder and ejection spring for extending a roll bar, in response to a control pulse triggered by a crash situation, from a lowered rest position to an erected supporting position;
a controlled release locking means for releasing the support piston so that it can be extended out of said guide cylinder by an ejection spring and relocking said support piston in an extended end position;
drive means, connected to said at least one piston-cylinder means, for controlling the direction of movement and the speed of the spring-loaded support piston;
and cancelling means for cancelling the influence of the drive means on the spring-loaded support piston in response to a crash signal.
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Abstract
A piston-cylinder unit, which erects a swingable roll bar in a crash situation by an ejection spring, includes a controllable drive by which the movement and the direction of movement of the piston can be controlled and which can be disengaged in the event of a crash pulse, whereupon the piston extends rapidly by virtue of the ejection spring.
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Citations
23 Claims
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1. A drive arrangement for a motor vehicle roll bar, comprising:
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at least one piston-cylinder means including a support piston, guide cylinder and ejection spring for extending a roll bar, in response to a control pulse triggered by a crash situation, from a lowered rest position to an erected supporting position; a controlled release locking means for releasing the support piston so that it can be extended out of said guide cylinder by an ejection spring and relocking said support piston in an extended end position; drive means, connected to said at least one piston-cylinder means, for controlling the direction of movement and the speed of the spring-loaded support piston; and cancelling means for cancelling the influence of the drive means on the spring-loaded support piston in response to a crash signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification