Curtain airbag arrangement for a motor vehicle

Abstract

Curtain airbag arrangement (150) for a motor vehicle (5), comprising a curtain airbag (151) attachable along an upper edge to a part of a body structure of the motor vehicle (5) and at least one inflation device (120A, 120B) for inflating the curtain airbag (151), wherein the curtain airbag (151) comprises at least one inflatable chamber (40, 142, 143, 145, 147) and several deployment tubes (130, 131, 132, 133, 135) formed as part of the curtain airbag (151) to assist in the deployment of the curtain airbag (151), wherein the several deployment tubes (130, 131, 132, 133, 135) are rapidly inflated when the curtain airbag (151) is deployed. (151) to quickly pull into position, characterized in that the arrangement (150) comprises a first inflation device (120A) for supplying gas to the first and second deployment hoses (130, 132), a second inflation device (120B) for supplying gas to a third,fourth and fifth deployment tubes (131, 133, 135), and each of the deployment tubes (130, 131, 132, 133, 135) is partially surrounded by a respective inflatable chamber (140, 142, 143, 145, 147).

Description

[0001] The present invention relates to motor vehicles and in particular to an improved curtain airbag arrangement for a motor vehicle according to the preamble of claim 1.

[0002] It is well known to equip a motor vehicle with a curtain airbag to protect an occupant of the motor vehicle from contact with a side of the vehicle in an accident and to prevent a part of the occupant's body from breaking through a window opening if the vehicle rolls over.

[0003] One problem with curtain airbags is that, especially with large airbags, the time required for deployment can be significant unless a very large inflation device is used. Such large inflation devices are difficult to accommodate in a vehicle and are therefore undesirable. Furthermore, the curtain airbag is easily deformed during inflation, and thus it is possible for it to be forced through the window opening in the event of an impact before it reaches full operating pressure.

[0004] US 2003 / 0111829A1 describes a generic curtain airbag arrangement.

[0005] Another curtain airbag arrangement is known from the subsequently published DE 10 2011 051 318 A1.

[0006] One object of the present invention is to provide a curtain airbag for a motor vehicle that can be deployed more quickly without requiring a larger inflation device and that has greater resistance to being forced out through a window opening.

[0007] The aforementioned problem is solved by means of an airbag arrangement with the features of claim 1; furthermore, by a motor vehicle containing such an airbag arrangement according to claim 11.

[0008] Advantageous embodiments of the invention are described in the dependent patent claims.

[0009] According to a first aspect of the invention, a curtain airbag arrangement for a motor vehicle is provided, comprising a curtain airbag attachable along an upper edge to a part of a body structure of the motor vehicle and at least one inflation device for inflating the curtain airbag, wherein the curtain airbag has at least one inflatable chamber and several deployment tubes formed as part of the airbag to assist in the deployment of the airbag, wherein the several deployment tubes are rapidly inflated when the curtain airbag is deployed in order to quickly pull the curtain airbag into position.

[0010] Each deployment tube can extend essentially vertically downwards from the top edge of the curtain airbag when the curtain airbag is fully deployed.

[0011] Each deployment tube can extend from the top edge of the curtain airbag to a lower edge of the curtain airbag over essentially the entire length of the curtain airbag.

[0012] The total volume of the deployment tubes can be relatively small compared to the combined total volume of the deployment tubes and the at least one inflatable chamber, thereby reducing the time required to inflate the curtain airbag.

[0013] At least one deployment tube may have one or more ventilation openings for supplying gas to at least one inflatable chamber.

[0014] The one or more ventilation openings can supply gas to a bottom end of the at least one inflatable chamber.

[0015] Each inflation device can be connected to the curtain airbag via a distributor with at least one separate outlet for each deployment hose.

[0016] According to a first embodiment, the curtain airbag can have two inflatable chambers, and each of the chambers can be bounded on both sides by a respective deployment tube, wherein the arrangement has a single inflation device and the distributor has a first outlet for supplying gas to a first deployment tube located at one end of the airbag, a second outlet for supplying gas to a second deployment tube located at an opposite end of the airbag, a third outlet for supplying gas to a third deployment tube located between the two inflatable chambers, a fourth outlet for supplying gas to one of the two inflatable chambers, and a fifth outlet for supplying gas to the other of the two inflatable chambers.

[0017] The upper end of each of the two inflatable chambers is filled by the distributor connected to the inflation device.

[0018] According to a second embodiment, the arrangement according to the invention can have a first inflation device for supplying gas to the first and second deployment hoses, a second inflation device for supplying gas to a third, fourth and fifth deployment hose, and each of the deployment hoses can be partially surrounded by a respective inflatable chamber.

[0019] Each inflatable chamber can be designed to form a number of fingers that interlock with the fingers on the adjacent inflatable chamber when the inflatable chambers are inflated.

[0020] Each of the deployment tubes can be designed to provide a large head protection area and a small inflation volume.

[0021] Each of the vents can have a small area to restrict the gas flow from the respective deployment hose to an inflatable chamber.

[0022] According to a second aspect of the invention, a motor vehicle is provided with at least one curtain airbag arrangement constructed according to the first aspect of the invention.

[0023] The invention is described below by way of example with reference to the accompanying drawing; therein show: Fig. 1 a partial side view of a right side of a motor vehicle with a curtain airbag arrangement according to a first embodiment of the invention, showing the airbag arrangement in a stowed state before deployment; Fig. 2 a similar view to Fig. 1, which, however, shows an airbag that forms part of the airbag assembly in a deployed state; Fig. 3 An enlarged view of an inflation device and distributor forming part of the airbag assembly; Fig. 4 a cross-sectional section along line xx in Fig. 2 by a deployment tube that forms part of the airbag, showing the deployment tube in a fully inflated state; Fig. 5 a side view section of the in Fig. 4 high-pressure deployment hose shown at the beginning of inflation; and Fig. 6 a side view of a curtain airbag arrangement according to a second embodiment of the invention, showing the curtain airbag in a deployed state.

[0024] On Fig. Figure 1 shows a portion of the right side of a motor vehicle 5 as viewed from inside the vehicle. The motor vehicle 5 has a body structure 6 comprising a side wall 6W with three structural members in the form of an A-pillar 8A, a B-pillar 8B, and a C-pillar 8C. The side wall 6W has two window openings 7A and 7B. A storage compartment 9 for a curtain airbag 30 is located at the upper end of the side wall 6W for storing the curtain airbag 30 before deployment.

[0025] Now to the Fig. Referring to Figures 2 to 5, a curtain airbag assembly 50 includes the curtain airbag 30. The curtain airbag 30 has an upper edge 36, a lower edge 37, a front edge 38, and a rear edge 39. When deployed, the curtain airbag 30 has a width “W” and a length “L” (as shown in Figures 2 to 5). Fig. 2 shown).

[0026] The curtain airbag 30 has a first and a second inflatable chamber 31, 32 and a first, a second and a third deployment tube 33, 34 and 35. The deployment tubes 33, 34, 35 are formed as an integral part of the curtain airbag 30 and are defined by seam columns 50 that seal and separate the deployment tubes 33, 34, 35 from the inflatable chambers 31, 32. Fig. Figure 4 shows two seam columns 50 that define the third unfolding tube 35.

[0027] Each of the inflatable deployment tubes 33, 34, 35 has a small internal volume compared to the two inflatable chambers 31, 32. In one example, the volume of each of the deployment tubes 33, 34, 35 was 2% of the volume of the inflatable chamber 31, and the inflatable chamber 32 had essentially the same volume as the inflatable chamber 31.

[0028] It is understood, however, that in other embodiments the two inflatable chambers 31, 32 could also have different volumes, or more or fewer than two inflatable chambers could be provided. In all cases, however, the volume of each deployment tube 33, 34, 35 is significantly smaller than any of the inflatable chambers of the curtain airbag, which allows it to be inflated quickly when the curtain airbag 30 is deployed.

[0029] Each of the deployment tubes 33, 34, 35 extends over substantially the entire length of the curtain airbag 30. When the curtain airbag 30 deploys substantially vertically, each of the deployment tubes 33, 34, 35 extends from a point near the upper edge 36 of the curtain airbag 30 to a point near the lower edge 37 of the curtain airbag 30.

[0030] An inflation device 21 is provided as part of the airbag assembly 50 to inflate the curtain airbag 30 for deployment. The inflation device 21 is controlled by an electronic control unit (not shown) according to parameters stored in the control unit and by inputs received from sensors (not shown) positioned on the motor vehicle 5, as is well known in the art.

[0031] The inflation device 21 is connected to a distributor 22, which has several outlets 23, 24, 25, 26, and 27 with small cross-sectional areas. Due to the very high pressure of approximately 600 bar generated in the inflation device 21, the flow rate from the outlets 23, 24, 25, 26, and 27 is sufficient to produce the desired inflation. However, when the curtain airbag 30 collapses after the inflation device 21 has deflated, the small cross-sectional area presents a significant resistance to the flow of the relatively low-pressure gas (approximately 1.0 bar) from the inflatable chambers 31 and 32. The small cross-sectional area of ​​the outlets therefore effectively acts as a two-way valve, allowing flow during inflation and restricting flow during deflation.The outlets 23, 24, 25, 26 and 27 are connected to the two inflatable chambers 31, 32 and to the three deployment tubes 33, 34, 35 as follows.

[0032] The outlet 23 is connected to the first deployment hose 33, which is positioned near the front edge 38 of the curtain airbag 30, and is arranged to supply a gas flow “A” to the respective deployment hose 33 when the curtain airbag 30 is deployed.

[0033] The outlet 24 is connected to the second deployment hose 34, which is positioned near the rear edge 39 of the curtain airbag 30, and is arranged to supply a gas flow “D” to the respective deployment hose 33 when the curtain airbag 30 is deployed.

[0034] The outlet 25 is connected to the third deployment hose 35, which is positioned between the two inflatable chambers 31, 32, and is arranged to supply a gas flow “F” to the respective deployment hose 35 when the curtain airbag 30 is deployed.

[0035] The outlet 26 is connected to the first inflatable chamber 31, which is positioned towards the front end of the curtain airbag 30, and is arranged to supply a gas flow “B” to the first chamber 31 when the curtain airbag 30 is deployed.

[0036] The outlet 27 is connected to the second inflatable chamber 32, which is positioned towards the rear end of the curtain airbag 30, and is arranged to supply a gas flow “C” to the second inflatable chamber 32 when the curtain airbag 30 is deployed.

[0037] The cross-sectional area of ​​outlets 23 to 27 could be identical, or they could have different cross-sectional areas to provide different flow rates “A” to “F”.

[0038] In Fig. Figure 5 shows the curtain airbag 30 in a rolled-up, stowed state shortly after inflation has begun, and the third deployment tube 35 begins to inflate. It is understood that the curtain airbag 30 could also be folded instead of rolled up in its stowed state.

[0039] The operation of the airbag assembly is as follows: When the inflation device 21 receives a command to inflate the curtain airbag 30, it begins to generate gas that flows into the distributor 22 and then through the outlets 26, 27; 23, 24, 25 to the inflatable chambers 31, 32 and to the deployment tubes 33, 34 and 35, respectively. Since the deployment tubes 33, 34, 35 have a relatively small volume, they are rapidly inflated by the initial gas flow, causing them to straighten out of their stowed position, thereby pulling the rest of the curtain airbag 30 into position before the inflation of the inflatable chambers 31, 32 is complete. The gas continues to flow, thereby inflating the inflatable chambers 31, 32, which have been properly pre-positioned by the deployment tubes 33, 34, 35 so that they lie over the window openings 7A, 7B.

[0040] In contrast to a conventional curtain airbag, the time required to position the curtain airbag 30 is therefore not determined by the time required to fill the relatively large volume of the inflatable chambers 31, 32, but is determined by the time required to inflate the deployment tubes 33, 34, 35, which assists the deployment of the curtain airbag 30 by quickly pulling it into position as they unfold.

[0041] One advantage of the invention is that, compared to a conventional curtain airbag, a smaller inflation device can be used, since, unlike a conventional curtain airbag, the filling time of the two inflatable chambers 31, 32 does not determine the time required to position the curtain airbag 30.

[0042] A further advantage can be achieved if the pressure in the deployment tubes 33, 34, 35 is designed to remain high for the duration that the curtain airbag 30 is deployed. In such a case, the deployment tubes 33, 34, 35 act as stiffening elements that can prevent impermissible deformation of the curtain airbag 30 and reduce the possibility of part of the curtain airbag being forced out through one of the window openings 7A and 7B. The deployment tubes 33, 34, 35 can therefore stabilize the curtain airbag 30 and help to hold it in position.

[0043] Another advantageous arrangement consists of providing one or more vents in one or more of the deployment tubes 33, 34, 35. The vent(s) (not shown) is / are positioned near the lower edge 37 of the curtain airbag 30. As the deployment tubes 33, 34, 35 approach their fully deployed positions, the unfolding or unrolling of the material forming the deployment tubes 33, 34, 35 exposes the vent(s), allowing gas to flow from the respective deployment tube 33, 34, 35 into an adjacent inflatable chamber 31, 32. This increases the inflation rate of the inflatable chambers 31, 32 after the curtain airbag 30 has been positioned by the initial inflation of the deployment tubes 33, 34, 35.Such an arrangement allows the inflatable chambers 31, 32 to be filled from above via the distributor 22 and the outlets 26, 27, and from below via one or more vents in one or more of the deployment tubes 33, 34, 35. This is advantageous insofar as it is normally difficult to generate a rapid inflation of the lower end of a curtain airbag, but in some cases, initial contact with an occupant may occur precisely there.

[0044] Although, as described above, the curtain airbag has two inflatable chambers, it is understood that it can advantageously be applied to curtain airbags with a different number of inflatable chambers.

[0045] Now with reference to Fig. Figure 6 shows a second embodiment of a curtain airbag arrangement 150 according to the invention for use in a motor vehicle such as the motor vehicle 5. The airbag arrangement 150 comprises a curtain airbag 151 and two inflation devices 120A, 120B.

[0046] The curtain airbag 151 has a top edge 136, a bottom edge 137, a front edge 138, and a rear edge 139. When the curtain airbag 151 is deployed, it has a width “W” and a length “L” (as shown in Fig. 6 (specified).

[0047] The curtain airbag 151 contains a first, second, third, fourth and fifth inflatable chamber 140, 142, 143, 145 and 147 respectively, and a first, second, third, fourth and fifth deployment tube 130, 132, 131, 133 and 135 respectively.

[0048] The deployment tubes 130, 132, 131, 133 and 135 are designed as an integral part of the curtain airbag 151 and are defined by a seam that seals the deployment tubes 130, 132, 131, 133 and 135 from the inflatable chambers 140, 142, 143, 145 and 147.

[0049] Each of the inflatable deployment tubes 130, 132, 131, 133 and 135 has a relatively small internal volume so that they can be inflated quickly.

[0050] Each of the deployment tubes 130, 132, 131, 133 and 135 extends from a point near the upper edge 136 of the curtain airbag 151 to the lower edge 137 of the curtain airbag 151 in a longitudinal direction of the curtain airbag 151 and extends substantially vertically when the curtain airbag 151 is inflated.

[0051] The two separate inflation devices 120A and 120B are designed to inflate the curtain airbag 151 for deployment. The inflation devices 120A and 120B are controlled by an electronic control unit (not shown) according to parameters stored in the control unit and by inputs received from sensors (not shown) positioned on the motor vehicle to which the curtain airbag 151 is attached, as is well known in the art.

[0052] The first inflation device 120A is connected via a (not shown) distributor with two outlets (indicated by arrows in Fig. 6 shown).

[0053] The first of these outlets supplies gas to the first deployment hose 130, and the other outlet supplies gas to the second deployment hose 132. Each of the deployment hoses 130, 132 contains one or more ventilation openings formed by a weakened seam. In the Fig. In the example shown in Figure 6, the first deployment tube has two vents v1 and v2, and the second deployment tube 132 also has two vents v3 and v4, although it is understood that there could be a different number of vents. The vents v1, v2; v3, v4 are located at a lower end of the respective deployment tubes 130, 132 and are formed by the localized failure of the stitching that forms the respective deployment tubes 130, 132 when the pressure in the respective deployment tubes 130, 132 reaches a certain predefined level. Once the vents v1, v2; v3, v4 are formed, gas can flow from the two deployment tubes 130, 132 into the two respective inflatable chambers 140, 142.That is, the first chamber 140 is filled with the gas flowing from the first deployment hose 130 via the ventilation openings v1 and v2, and the second chamber 142 is filled with the gas flowing from the second deployment hose 132 via the ventilation openings v3 and v4.

[0054] Each of the chambers 140, 142 is essentially U-shaped and partially encloses the deployment tube 130, 132 from which it is inflated. Each of the deployment tubes 130, 132 is shaped to provide good head protection with minimal volume. In the example shown, the deployment tubes 130, 132 are wider near the lower edge 137 of the curtain airbag 151 than they are near the upper edge 136. This is because, in this example, when the curtain airbag 151 is deployed, the occupant's head is closer to the lower edge 137 than to the upper edge 136.

[0055] As an alternative to the arrangement described above, each of the ventilation openings v1, v2; v3, v4 can be permanently open, but has a small area to act as a choke or restriction for the flow. In either case, the ventilation openings v1, v2, v3 and v4 ensure that the deployment tubes 130, 132 deploy quickly to provide head protection, and then the first and second chambers 140, 142 fill to provide rollover ejection protection.

[0056] The second inflation device 120B is connected via a (not shown) distributor with three outlets (in Fig. 6 (shown by arrows).

[0057] The first of these outlets supplies gas to the third expansion tube 131, the second of these outlets supplies gas to the fourth expansion tube 133, and the third outlet supplies gas to the fifth expansion tube 135. Each of the expansion tubes 131, 133, and 135 contains one or more ventilation openings formed by a weakened seam. In the Fig.In the example shown in Figure 6, the third deployment tube 131 has two ventilation openings v5 and v6, the fourth deployment tube 133 has two ventilation openings v7 and v8, and the fifth deployment tube 135 also has two ventilation openings v9 and v10, although it is understood that a different number of ventilation openings could be present. The ventilation openings v5, v6; v7, v8 and v9, v10 are all located at a lower end of the respective deployment tubes 131, 133, and 135 and are formed by the localized failure of the stitching that forms the respective deployment tubes 131, 133, and 135 when the pressure in the respective deployment tubes 131, 133, and 135 reaches a certain predefined level. After the ventilation openings v5, v6; When v7, v8 and v9, v10 are formed, gas can flow from the three deployment tubes 131, 133 and 135 into the three respective enclosing chambers 143, 145 and 147.That is, the third chamber 143 is filled with the gas flowing from the third deployment hose 131 via the vents v5 and v6, the fourth chamber 145 is filled with the gas flowing from the fourth deployment hose 133 via the vents v7 and v8, and the fifth chamber 147 is filled with the gas flowing from the fifth deployment hose 135 via the vents v9 and v10.

[0058] Each of the chambers 143, 145, and 147 is essentially U-shaped and partially encloses the deployment tubes 131, 133, and 135 from which it is inflated. Each of the deployment tubes 131, 133, and 135 is shaped to provide good head protection with minimal volume. In the example shown, the deployment tubes 131 and 135 are wider near the lower edge 137 of the curtain airbag 151 than they are near the upper edge 136. This is because, in this example, when the curtain airbag 151 is deployed, the occupant's head is closer to the lower edge 137 than to the upper edge 136.

[0059] As an alternative to the arrangement described above, each of the vents v5, v6; v7, v8 and v9, v10 can be permanently open, but has a small area to act as a choke or restriction for the flow. In each case, the vents v5, v6; v7, v8 and v9, v10 ensure that the deployment tubes 131, 133 and 135 deploy rapidly to provide head protection, and then the third, fourth and fifth inflatable chambers 143, 145 and 147 inflate to provide rollover ejection protection.

[0060] It is noted that the vertical edges of the respective chambers 140, 142, 143, 145, and 147, where they interact, have a finger-like shape, such that when the inflatable chambers 140, 142, 143, 145, and 147 are inflated, the fingers interlock. This arrangement provides additional head protection when the curtain airbag 151 deploys, as the fingers can be positioned above the vertical structure of the vehicle (A-, B-, C-, D-pillar, etc.). Furthermore, this finger-like structure locally stiffens the curtain airbag 151, providing increased resistance to localized ejection of the curtain airbag 151 through the window opening below, while reducing the volume of gas required to achieve this functionality.

[0061] The deployment tubes 130, 132, 131, 133, and 135 have the primary function of rapidly inflating the curtain airbag 151 to provide rapid head protection. For example, head cushioning can be provided in just 30 ms after the initiation of the inflation devices 120A and 120B. This is achieved by using a relatively small gas volume for each of the deployment tubes 130, 132, 131, 133, and 135. Each of the deployment tubes 130, 132, 131, 133, and 135 is designed to provide a large head protection area with a small inflation volume.

[0062] After providing the initial deployment and head protection functions, the deployment tubes 130, 132, 131, 133 and 135 are used to fill the inflatable chambers 140, 142, 143, 145 and 147, whose primary function is to provide increased resistance to the deployment of the curtain airbag 151 along with an additional head impact protection cover.

[0063] It is understood that if the size of the deployment tubes 130, 132, 131, 133, and 135 were increased to cover the entire area covered by the combination of deployment tubes 130, 132, 131, 133, and 135 and inflatable chambers 140, 142, 143, 145, and 147, the time required to inflate such a large volume would be much longer if inflation devices of the same size were used. Slower inflation is undesirable because it provides less head impact protection early in an accident. As mentioned above, the use of larger inflation devices is undesirable because they are more difficult to encapsulate.

[0064] The operation of the airbag arrangement 150 is as follows.

[0065] When the deployment of the curtain airbag 151 is detected as a result of an accident, the two inflation devices 120A, 120B are energized and begin to generate gas that very rapidly inflates the five deployment hoses 130, 132, 131, 133 and 135, thereby deploying the curtain airbag 151 into a fully deployed state, in which it lies over the underlying window openings and the body structure to provide rapid head protection.The pressure in the five deployment tubes 130, 132, 131, 133 and 135 then continues to increase until the predefined pressure is reached, at which point the vents v1, v2, v3, v4, v5, v6, v7, v8, v9 and v10 open, whereupon all vents v1, v2, v3, v4, v5, v6, v7, v8, v9 and v10 open to allow gas to flow into the surrounding inflatable chambers 140, 142, 143, 145 and 147, thereby providing additional head protection and increasing the resistance of the curtain airbag 151 to ejection through one or more of the underlying window openings (not shown).

[0066] In short, the use of relatively small-volume inflatable deployment tubes therefore provides a cost-effective way to position a curtain airbag more quickly without the need for a large inflation device.

Claims

[1] Curtain airbag arrangement (150) for a motor vehicle (5), comprising a curtain airbag (151) attachable along an upper edge to a part of a body structure of the motor vehicle (5) and at least one inflation device (120A, 120B) for inflating the curtain airbag (151), wherein the curtain airbag (151) comprises at least one inflatable chamber (40, 142, 143, 145, 147) and a plurality of deployment tubes (130, 131, 132, 133, 135) formed as part of the curtain airbag (151) to assist in deploying the curtain airbag (151), wherein the plurality of deployment tubes (130, 131, 132, 133, 135) are rapidly inflated upon deployment of the curtain airbag (151) to to quickly pull the curtain airbag (151) into position, characterized bythat the assembly (150) comprises a first inflator (120A) for supplying gas to the first and second deployment tubes (130, 132), a second inflator (120B) for supplying gas to a third, fourth and fifth deployment tube (131, 133, 135), and each of the deployment tubes (130, 131, 132, 133, 135) is partially surrounded by a respective inflatable chamber (140, 142, 143, 145, 147). [2] The assembly (150) of claim 1, wherein each deployment tube (130, 131, 132, 133, 135) extends substantially vertically downward from the upper edge (136) of the curtain airbag (151) when the curtain airbag (151) is fully deployed. [3] An assembly (150) according to claim 1 or 2, wherein each deployment tube (130, 131, 132, 133, 135) extends from the upper edge (136) of the curtain airbag (151) to a lower edge (137) of the curtain airbag (151) over substantially the entire length of the curtain airbag (151). [4] The assembly (150) of any one of claims 1 to 3, wherein the total volume of the deployment tubes (130, 131, 132, 133, 135) is relatively small compared to the combined total volume of the deployment tubes (130, 131, 132, 133, 135) and the at least one inflatable chamber (140, 142, 143, 145, 147), thereby reducing the time required to inflate the curtain airbag (151). [5] Arrangement (150) according to one of claims 1 to 4, wherein at least one deployment tube (130, 131, 132, 133, 135) has one or more ventilation openings (v1-v10) for supplying gas to at least one inflatable chamber (140, 142, 143, 145, 147). [6] The assembly (150) of claim 5, wherein the one or more vents (v1-v10) supply gas to a bottom end of the at least one inflatable chamber (140, 142, 143, 145, 147). [7] An assembly (150) according to any one of claims 1 to 6, wherein each inflator (120A, 120B) is connected to the curtain airbag (151) via a manifold having at least one separate outlet for each deployment tube (130, 131, 132, 133, 135). [8] An assembly (150) according to any one of claims 1 to 7, wherein each inflatable chamber (140, 142, 143, 145, 147) is configured to form a plurality of fingers which interlock with the fingers on the adjacent inflatable chamber when the inflatable chambers (140, 142, 143, 145, 147) are inflated. [9] The assembly (150) of any one of claims 1 to 8, wherein each of the deployment tubes (130, 131, 132, 133, 135) is configured to provide a large head protection area and a small inflation volume. [10] An assembly (150) according to claim 1 when dependent on claim 5 or claim 6, wherein each of the vents (v1-v10) has a small area to restrict the flow of gas from the respective deployment tube (130, 131, 132, 133, 135) to an inflatable chamber (140, 142, 143, 145, 147). [11] Motor vehicle (5) with at least one curtain airbag arrangement (150) according to one of claims 1 to 10.

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