EP3099537A1 - Device for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, and device for activating an impact protection device - Google Patents
Device for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, and device for activating an impact protection deviceInfo
- Publication number
- EP3099537A1 EP3099537A1 EP15703250.9A EP15703250A EP3099537A1 EP 3099537 A1 EP3099537 A1 EP 3099537A1 EP 15703250 A EP15703250 A EP 15703250A EP 3099537 A1 EP3099537 A1 EP 3099537A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- valve body
- opening
- valve
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
- B60R21/274—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas characterised by means to rupture or open the fluid source
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/01—Control of flow without auxiliary power
- G05D7/0126—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs
- G05D7/0133—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs within the flow-path
- G05D7/014—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs within the flow-path using sliding elements
Definitions
- the invention is based on a device for controlling a volume flow of a medium under pressure for activating an impact protection device according to the preamble of independent claim 1 and of an apparatus for activating an impact protection device according to the preamble of independent claim 10.
- a volume flow for filling an airbag of a vehicle is usually generated with a hot gas generator or by means of pyrotechnics or with a cold gas storage.
- a hot gas generator is, for example, squibs that receive a signal for spark ignition in the event of an accident by a control unit.
- the burning of the pills produces hot gases that directly fill an airbag.
- a cold gas storage gas is stored in a pressure vessel and sealed by a rupture disc. In the event of an accident, the rupture disk is destroyed by foreigners. After that, the stored with very high pressure gas enters the airbag.
- the device according to the invention for controlling a volume flow of a medium under pressure to activate an impact protection device with the features of independent claim 1 and the device according to the invention for activating an impact protection device with the features of independent claim 10 have the advantage of cost-effective production. So many components are manufactured by tool-based manufacturing technologies. Only the component geometries absolutely necessary for the function, such as, for example, the control piston, use more complex production technologies with high ISO tolerance grades.
- Embodiments of the control device according to the invention serve the purpose of controlling the gas volume flow of an occupant protection system in a motor vehicle.
- the impact protection device may be an airbag or airbag or the like.
- the medium may be cold gas or the like.
- the media reservoir may also be referred to as a gas generator and configured to confine the medium to be used to fill the impact protection device until a moment of activation of the impact protection device.
- a gas source a hybrid gas generator can be used.
- a buffer tank is additionally required, which can absorb the resulting gas and caching on ignition.
- a bursting element can be provided in order to close the media reservoir in the form of a cover and to be destroyed in the event of a collision in a simple and rapid manner, so that the medium can flow out of the media reservoir through the device and thus reach the impact protection device.
- the control piston and the valve body may be formed to allow movement of the control piston in the passage opening of the valve body between the home position and the activation position.
- the control piston and the passage opening of the valve body may be formed in order to effect a low-leakage installation of at least a part of an outer circumferential surface of the control piston on a wall of the passage opening.
- Embodiments of the control device according to the invention can advantageously form or control a volume flow of a pressurized medium, with which an impact protection device is to be filled, in a case-specific manner.
- a shaping of the volumetric flow can be achieved, for example, in a cold gas generator for an airbag by means of a control module, in which a control piston can be moved back and forth in an advantageously defined manner through the medium and by means of a control valve so that predetermined discharge channels or discharge openings are released or closed.
- Such a shaping of the volumetric flow is characterized by the possibility of repeatable shut-off, setting and opening of a high gas volume flow, in particular for the filling of an airbag in vehicles.
- embodiments of the control device according to the invention make it possible, in particular, for specific volume flows to be realized, depending on the weight of a person to be protected by the impact protection device.
- a repeated opening and closing of the media supply to the impact protection device can be realized in order to use the functional advantage of damping by the airbag, for example, in an accident with multiple vehicle shocks.
- a deployment speed of the airbag for different passenger weight classes and sizes can be interpreted.
- a protective effect of the impact protection device can be achieved largely independent of the size and / or weight of persons to be protected.
- Embodiments of the present invention provide a device for controlling a volume flow of a pressurized medium for activating an impact protection device having a control module comprising a valve body having a stepped through-hole and a control piston axially guided in the through-hole of the valve body, and a control valve which influences the movement of the spool.
- the valve body at a first end a closable media inlet opening with a valve chamber and at a second end a control chamber with a control valve opening, wherein between the first end and the second end of the valve body at least one of the through
- the outlet opening branching drain channel is arranged for discharging the medium in the impact protection device.
- the control piston has a through opening formed along its main extension axis from a first active area facing the media inlet opening to a second active area facing the control valve opening, the first effective area being smaller than the second effective area.
- the control piston is movable in the passage opening of the valve body by means of the medium and depending on the position of the control valve between a first position, in which the at least one discharge channel is closed by the control piston, and a second position, in which the at least one discharge channel released by the control piston is.
- the control valve and the control module are arranged in a common housing sleeve, wherein the valve body of the control module until it stops at a housing shoulder in a first end of the
- Housing sleeve is pressed, and wherein the control valve is inserted and fixed in a second end of the housing sleeve.
- the axial forces resulting from the pressure load can be absorbed on the housing shoulder of the housing sleeve produced, for example, as a deep-drawn part.
- a device for activating an impact protection device with a media reservoir for storing the medium under pressure and a bursting element for closing a media outlet opening of the media reservoir comprises a device according to the invention for controlling a volume flow of a medium stored under pressure for activating the impact protection device.
- the control device can be fixed, for example, by crimping on the media reservoir or gas storage container. If necessary, the
- Crimp connection can be strengthened by a welding process.
- Rupture disc can be placed between the valve body and the media storage.
- valve body may have a taper on the outer circumference, so that in the pressed state between the valve body and the housing sleeve, a free space may arise, in which the at least one discharge channel of the valve body can open, and at which the housing sleeve at least a first discharge opening can have.
- the control valve can be designed as a solenoid valve with a magnet assembly which can move an armature with a plunger against the force of a return spring from a first position to a second position in the energized state, wherein a plunger arranged on the closing element, the control valve opening release in an open position for a passage of the medium and can seal the control valve opening in a closed position.
- the magnet assembly can be fixed axially in the housing sleeve by a crimped connection, wherein a stroke of the control valve can be set or adjusted via the axial position of the magnet assembly.
- the stroke adjustment of the control valve can be carried out in an advantageous manner by displacement of the complete magnet assembly in the direction of the valve body.
- the position of the magnet assembly in the housing sleeve can be fixed, for example, by a crimping process performed externally on the housing sleeve.
- the armature can for example be designed as a flat disc with a central bore, via which the armature can be pressed onto the plunger. This advantageously allows a simple and cost-effective production of the control valve.
- a cutting disc having a central guide bore, through which the plunger can be guided, separate an armature space of the control valve from an interior of the housing sleeve, which has at least one second discharge opening can have.
- control valve opening and a trained on the edge of the control valve opening control valve seat can be introduced into a valve seat plate, which can be pressed into the valve body at the second end.
- the valve seat plate can be pressed tightly into the valve body and secured by a (possibly partial) caulking process.
- the valve body can be made in two parts, wherein a first valve body part can form a plurality of drain channels and the valve chamber, and wherein the second valve body part can form the control chamber.
- the first valve body part and the second valve body part can be connected to each other, for example by means of a press connection.
- FIG. 1 shows a schematic perspective illustration of an exemplary embodiment of a device according to the invention for controlling a volume flow of a medium stored under pressure for activating an impact protection device.
- FIG. 2 shows a schematic sectional representation of the control device according to the invention from FIG. 1.
- 3 shows a schematic perspective sectional view of a first valve body part for the control device according to the invention from FIG. 1.
- FIG. 4 shows a schematic perspective sectional view of a second valve body part for the control device according to the invention from FIG. 1.
- the exemplary embodiment of a device 1 for controlling a volume flow of a medium stored under pressure for activating an impact protection device comprises a control module 20 which has a valve body 22, 22A, 22B with a stepped passage 22.3, 22.3 A, 22.3B and a control piston 26 guided axially in the passage opening 22.3, 22.3A, 22.3B of the valve body 22, 22A, 22B, and a control valve 10 which influences the movement of the control piston 26.
- the valve body 22, 22 A, 22 B has at a first end a closable media inlet opening 28 with a valve chamber 22.4, 22.4A and at a second end a control chamber 22.5, 22.5B with a control valve opening 24.2, wherein between the first end and the second End of the valve body 22, 22A, 22B at least one of the passage opening
- the control piston 26 has a through opening 26.3 formed along its main extension axis from a first active surface 26.1 facing the media inlet opening 28 to a second active surface 26.2 facing the control valve opening 24.2, wherein the first active surface 26.1 is smaller than the second active surface 26.2.
- the control piston 26 is in the passage opening 22.3, 22.3A, 22.3B of the valve body 22, 22A, 22B by means of the medium and depending on the position of the control valve 10 between a first position, in which the at least one outlet passage 22.1, 22.1A the control piston 26 is closed, and a second position movable, in which the at least one discharge channel 22.1, 22.1A is released by the control piston 26.
- control valve 10 and the control module 20 are arranged in a common housing sleeve 3, wherein the valve body 22, 22 A, 22 B of the control module 20 until it stops at a housing shoulder 3.3 in a first end 3.1 of the housing sleeve 3 is pressed, and wherein the control valve 10 is inserted and fixed in a second end 3.2 of the housing sleeve 3.
- the housing sleeve 3 is designed as a deep-drawn part. In operation, the axial forces resulting from the pressure load on the shoulder 3.3 are received by the housing sleeve 3.
- control valve opening 24. 2 is introduced into a valve seat plate 24.
- the valve seat plate 24 is pressed tightly into the valve body 22 at the second end and is replaced by a (possibly partial)
- a control valve seat 24.1 is formed in the valve seat plate 24 at the edge of the control valve opening 24.2.
- control valve 10 or pilot valve is designed as a solenoid valve.
- the control valve 10 includes a plunger 14 with closing element 14.1, which is designed in the illustrated embodiment as a sealed sealing ball, an armature 13, a return spring 15 and a magnet assembly 11, which a magnetic pot 11.1, an electric coil with coil winding 11.2, winding body 11.3 and electrical contacting 11.4 includes.
- the magnet assembly 11 moves in the energized state, the armature 13 with the plunger 14 against the force of the return spring 15 from a first position to a second position.
- a closing element 14.1 arranged on the plunger 14 releases the control valve opening 24.2 in an open position for a passage of the medium and, in a closed position, seals the control valve opening 24.2 in the control valve seat 24.1.
- the control valve 10 is designed as a normally closed valve and has in the de-energized state the closed state shown in Fig. 2, in which the closing element 14.1 seals in the control valve seat 24.1.
- the return spring 15 is configured to hold the control valve 10 in the closed position. If the magnet assembly is energized, then the closing element 14.1 lifts against the force of the return spring 15 from the control valve seat 24.1 and releases the control valve opening 24.2.
- the control valve 10 may be executed in a non-illustrated embodiment as a normally open valve. In this version In the current-free state, the closing element 14.1 releases the control valve opening 24.2 and, in the energized state, seals the control valve opening 24.2 in the control valve seat 24.1.
- the return spring 15 is formed to hold the control valve 10 in the open position. If the magnet assembly is energized, then the closing element 14.1 is pressed against the force of the return spring 15 in the control valve seat 24.1 and seals the control valve opening 24.2.
- the closing element 14.1 designed as a ball is enclosed on the end of the plunger 14 facing the control valve opening 24.2.
- a guide ring 14.2 is arranged with Federauflageschulter 14.3, which is received in a central passage of the magnetic pot 11.1 of the magnetic assembly 11 of the control valve 10 and axially guided.
- the return spring 15 is also arranged in the implementation of the magnet pot and is supported at one end on the spring support shoulder 14.3 of the plunger 14 and at the other end to a pressed-adjusting bushing 16, via which the biasing force of the return spring 15 of the control valve 10 can be adjusted.
- the plunger 14 is arranged axially movable to open the control valve opening 24.2 and close.
- the stroke adjustment of the control valve 10 is effected by displacement of the complete magnet assembly 10 in the direction of the valve body 22. Subsequently, the position of the magnet assembly in the
- Housing sleeve 3 for example, by a crimping process on an externally arranged crimping 3.4 of the housing sleeve 3 fixed.
- the armature 13 in the exemplary embodiment shown is designed as a flat disk with a central bore 13.1, via which the armature 13 is pressed onto the tappet 14.
- the separating disk 17 separates an armature space 12 of the control valve 10 from an interior of the housing sleeve 3, which has at least one second discharge opening 7.
- the cutting disk 17 advantageously keeps flow-related reactions away from the armature chamber 12 of the control valve 10.
- the impact protection device can be designed, for example, as an airbag of a personal protection system.
- the device for activating the impact protection device can be designed, for example, as a cold gas generator, which has the control device 1 according to the invention for shaping the volume flow for activating or filling the airbag.
- the pressurized medium in this embodiment of the present invention is a cold gas.
- the device for activating the impact protection device has a non-illustrated media reservoir, a bursting element, not shown, which closes an outlet opening of the media reservoir, and the inventive control device 1 or device 1 for controlling the volume flow of the medium under pressure to activate the impact protection device.
- the control device 1 has the control module 20 with valve body 22 and control piston 26 and the control valve 10.
- the control device 1 is coupled to the media storage, wherein the bursting see between the outlet opening of the media storage and the inlet opening 28 of
- Control device 1 is arranged.
- the valve body 22 and the control piston 26 are arranged between the control valve 10 and the media reservoir.
- the bursting element is designed to hold the pressurized medium in the media reservoir in an intact state and, in a burst state, to let the medium flow from the media reservoir into the control device 1 and optionally into the airbag.
- the entire control device 1 is attached to the first end 3.1 of the housing sleeve 3, for example by crimping on the media storage, not shown. If necessary, the attachment can be reinforced with a welding process. Before the bonding is between the valve body 22 and the gas container the
- valve body 22 is executed in the illustrated embodiment of the present invention as a hollow cylindrical component.
- the stepped through opening 22.3. extends in the valve body 22 along a longitudinal extension of the valve body 22 through the valve body 22 and connects a arranged at the first end of the valve body 22 valve chamber 22.4 with a disposed within the valve body 22 control chamber 22.5, in which Control piston 26 is guided.
- the valve body 22 and the valve chamber 22.4 has at the first end the media inlet opening 28 to the media reservoir, which is closed in the assembled state of the bursting element.
- the valve body 22 has the valve seat disc 24 with the control valve opening 24.2 to the control valve 10 at the second end.
- the control chamber 22.5 thus has the control valve opening 24.2 at the second end.
- the valve body 22 has between the valve chamber 22.4 and the control chamber 22.5 a plurality of drain channels 22.1 for discharging the medium in the impact protection device. In addition, the valve body 22 in this area on
- valve body 22 has at least one discharge channel 22.2, which connects the control chamber 22.5 with the free space.
- the relief channel 22.2 relieves a vacuum between the valve body 22 and the control piston 26.
- the relief channel 22.2 is arranged in the region of a first step-shaped stop section 22.6 of the through-opening 22.3 of the valve body 22.
- the first stepped stop section serves as a stop 22.6 for the control piston 26.
- the passage opening 22.3 has a first inner diameter which is smaller than a second inner diameter of the passage opening 22.3 in the region of the control chamber 22.5.
- the control piston 26 is arranged axially movable in the passage opening 22.3.
- the first active surface 26. 1 of the control piston 26 is arranged adjacent to the media inlet opening 28 of the valve body 22.
- the second active surface 26.2 of the control piston 26 is disposed adjacent to the control valve opening 24.2. In this case, the first active area 26.1 is smaller than the second effective area 26.2.
- the control piston 26 is shaped so that at least a portion of an outer circumferential surface against a wall of the passage opening 22.3 fluid-tight.
- the control piston 26 has a stepped collar portion.
- the control piston 26 has a first outer diameter which is smaller than a second outer diameter between the stepped collar portion and the second effective surface 26.2.
- the control piston 26 is movable in the passage opening 22.3 of the valve body 22 by means of the medium and depending on a position of the control valve 10 between a basic position in which the drain channels 22.1 are closed by the control piston 26, and an activation position in which the drain channels 22.1 for the flowing medium are released.
- In the illustrated basic position of the control piston 26 of the stepped collar portion of the control piston 26 is located on the stepped stop portion 22.6 of the through hole 22.3 of the valve body 22 at.
- the function of the illustrated embodiment of the device 1 according to the invention for controlling a volume flow of a medium stored under pressure for activating an impact protection device will now be described.
- the movement of the control piston 26 is effected by the medium flowing through the control device 1 and the position of the control valve 10.
- the medium flows out of the media container when the bursting element is destroyed, for example by means of squibs. If the control valve opening 24.2 is opened by the control valve 10 in contrast to the illustration in FIG. 2, then the control piston 26 is moved by the medium flowing out of the media reservoir from the illustrated basic position into an activation position (not shown). During this movement, the medium flowing out of the medium reservoir acts on the first active surface 26.1 and pushes the control piston 26 in the direction of the control valve 10.
- the medium stored at high pressure flows through the opened discharge channels 22.1 and the first discharge openings 5 into the impact protection device and fills, for example Airbag on.
- the medium also flows through the passage opening 26.3 of the control piston 26.
- no pressure on the second effective surface 26.2 of the control piston 26 can be constructed, which triggers a return movement of the control piston 26 in the normal position, and it acts a lower Pressure on the second active surface 26.2 than on the first active surface 26.1. Therefore, the control piston 26 remains in the activation position, in which the Ab- Lasskanäle 22.1 are open.
- the discharge channel 22.2 serves to relieve a vacuum arising between the passage opening 22.3 and the control piston 26th
- control valve opening 24.2 If the control valve opening 24.2 is closed by the control valve 10, then a pressure acting on the second active surface 26.2 builds up in the control chamber 22.5, which triggers the return movement of the control piston 26 into the basic position. Because the second active surface 26.2 is larger than the first active surface 26.1, the force built up on the second active surface 26.2 is also greater. This results in that the control piston 26 is pushed by the medium back into the basic position. The control piston 26 is pushed to the stop 22.6 and closes the drain channels 22.1. A seal is carried out either radially by a piston guide or axially by flat seat or conical seat.
- valve body 22 may be assembled from two separate parts 22A, 22B to further facilitate manufacture.
- a first valve body part 22A forms a plurality of discharge passages 22.1A, the valve chamber 22.4A, and a part of the passage 22.3A.
- the second valve body part 22B forms the control chamber 22.5B and a second part of the through-hole 22.3B with the step-shaped stopper portions 22.6B.
- the first valve body part 22A can be produced, for example, as a simple injection-molded part. As a result, the costly drilling of the large number of transverse holes as drain channels 22.1A can be avoided.
- the individual parts 22A, 22B can be held together by a press connection.
- the second valve body part 22B has a press-fit collar 22.9B.
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014201520 | 2014-01-28 | ||
DE102015200900.9A DE102015200900A1 (en) | 2014-01-28 | 2015-01-21 | Device and method for controlling a volume flow of a medium stored under pressure for activating an impact protection device and device for activating an impact protection device |
DE102015200914.9A DE102015200914A1 (en) | 2014-01-28 | 2015-01-21 | Device for controlling a volume flow of a medium stored under pressure for activating an impact protection device and device for activating an impact protection device |
PCT/EP2015/051620 WO2015113974A1 (en) | 2014-01-28 | 2015-01-27 | Device for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, and device for activating an impact protection device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3099537A1 true EP3099537A1 (en) | 2016-12-07 |
Family
ID=53523151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15703250.9A Withdrawn EP3099537A1 (en) | 2014-01-28 | 2015-01-27 | Device for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, and device for activating an impact protection device |
Country Status (5)
Country | Link |
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US (2) | US9908501B2 (en) |
EP (1) | EP3099537A1 (en) |
CN (2) | CN106458140A (en) |
DE (2) | DE102015200914A1 (en) |
WO (1) | WO2015113974A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
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US20150210243A1 (en) | 2015-07-30 |
US9908501B2 (en) | 2018-03-06 |
DE102015200900A1 (en) | 2015-07-30 |
US9352722B2 (en) | 2016-05-31 |
US20170066403A1 (en) | 2017-03-09 |
CN104908700B (en) | 2019-02-12 |
WO2015113974A1 (en) | 2015-08-06 |
CN106458140A (en) | 2017-02-22 |
DE102015200914A1 (en) | 2015-07-30 |
CN104908700A (en) | 2015-09-16 |
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