摘要:
A triggered-stroke actuator with its piston being held stationary in an initial position prior to triggering. The piston (13) is installed in the body (12) facing propulsion means (15) and a locking arrangement (19) that includes a latch (30) and at least one flexible tongue (23) attached to the periphery of the piston and having a hook (25) engaged with an internal abutment, the latch being moved at the beginning of triggering.
摘要:
The invention relates to a constant force pyrotechnic actuator comprising a pyrotechnic gas generator, a body, a piston capable of moving in the said body under the effect of the gases emitted by the generator, and a pressure regulator member situated inside the piston, the said piston having a front face traversed by a duct making it possible to place in communication the space separating the gas generator and the said piston, and an inner space in which the regulator member is housed. Within said actuator, the piston is extended by a hollow push rod terminating in an enlarged head, the said head having gas discharge ducts, and the inner space of the said rod is in communication with the inner space of the piston in which the regulator member is housed.
摘要:
Pyrotechnic actuator in particular for lifting the hood of an automobile in the event of a collision with a pedestrian.The actuator comprises a return-braking arrangement (25) acting between the rod (17) and the body (13) of the actuator and having an inertial actuating threshold in order to brake the rod in return only if it is subjected to a force under a sufficient acceleration truly representative of a collision.
摘要:
The technical field of the invention is that of pyrotechnic actuators including a piston and having the essential function of exerting thrust to move an object by causing the piston to emerge. The invention relates more particularly to a pyrotechnic gas generator (2), a combustion chamber (3), a piston (10) capable of moving in a slide chamber (4) under the effect of said gas, the two chambers (3, 4) being in communication with each other. The main characteristic of this actuator is that it comprises a shutter device (5) implemented after said actuator (1) has been triggered to interrupt the communication between said chambers (3, 4), said shutter device (5) being included in the slide chamber (4).
摘要:
The technical field of the invention is that of devices used in the field of motor vehicle safety to protect a pedestrian in the event of a head-on impact between the said pedestrian and a motor vehicle.More precisely, the invention relates to a safety device (1,100) for lifting the bonnet (29,129) of a motor vehicle in the event of a collision, comprising a mechanism (3,103) for lifting the said bonnet (29,129), an actuator (16,116) fitted with a pyrotechnic gas generator and a member for latching the said lift mechanism (3,103).The main feature of this device is that the latching member consists of a hook (4,104) mounted pivotingly and fixedly attached to the said motor vehicle, the said actuator (16,116) inducing an action on the said hook (4,104) to unlatch the lift mechanism (3,103).
摘要:
A damping device used for motor vehicle safety, for damping the displacement of at least one part set in motion during a collision between a motor vehicle and an external object, the part being, for example, a bumper, a steering column or a bonnet of a motor vehicle, the device comprising an actuator that is able to displace a piston and is characterized in that it includes a wire having one end connected to a fixed portion of the vehicle, the actuator, which is secured to the part to be damped, interacting with the wire in order to retard and then stop the part.
摘要:
The technical field of the invention is that of devices used in the field of motor vehicle safety to protect a pedestrian in the event of a head-on impact between the said pedestrian and a motor vehicle. More precisely, the invention relates to a safety device (1,100) for lifting the bonnet (29,129) of a motor vehicle in the event of a collision, comprising a mechanism (3,103) for lifting the said bonnet (29,129), an actuator (16,116) fitted with a pyrotechnic gas generator and a member for latching the said lift mechanism (3,103). The main feature of this device is that the latching member consists of a hook (4,104) mounted pivotingly and fixedly attached to the said motor vehicle, the said actuator (16,116) inducing an action on the said hook (4,104) to unlatch the lift mechanism (3,103).
摘要:
The invention relates to a pyrotechnic gas generator (10) for a car airbag (12), the generator including a pyrotechnic charge and a pyrotechnic initiator (28) situated in a combustion chamber (14) and suitable for being actuated by a first detection system (30) for detecting an imminent collision state and/or by a second detection system (32) for detecting an actual collision state. The pyrotechnic gas generator of the invention further includes a gas flow passage (16, 18) between said combustion chamber (14) and said airbag (12), and at least one valve (34) suitable for being moved from a first position in which it defines a first flow section to a second position in which it defines a second flow section greater than said first flow section, or vice versa. In particular, the valve (34) is arranged in such a manner as to define a greater flow section when the pyrotechnic initiator (28) is actuated by the first detection system (30).
摘要:
The technical field of the invention is that of pyrotechnic actuators including a piston and having the essential function of exerting thrust to move an object by causing the piston to emerge. The invention relates more particularly to a pyrotechnic gas generator (2), a combustion chamber (3), a piston (10) capable of moving in a slide chamber (4) under the effect of said gas, the two chambers (3, 4) being in communication with each other. The main characteristic of this actuator is that it comprises a shutter device (5) implemented after said actuator (1) has been triggered to interrupt the communication between said chambers (3, 4), said shutter device (5) being included in the slide chamber (4).
摘要:
The technical field of the invention is that of pyrotechnic actuators comprising a piston, the basic function of which is to exert a thrust so as to displace an object by shooting out the piston.More particularly, the invention relates to a pyrotechnic actuator (1, 1a, 1b, 1c) comprising a pyrotechnic-gas generator (7), a combustion chamber (3) and a piston (9) which can move in a slide chamber (5) under the effect of the said gases.The principal characteristic of this actuator is that it comprises a shut-off device (4, 4a, 4b, 4c) used after the triggering of the said actuator (1, 1a, 1b, 1c) in order, on the one hand, to close the slide chamber (5) and, on the other hand, to secure the depressurization of the combustion chamber (3).