CN1876445A - Gas generator of airbag - Google Patents
Gas generator of airbag Download PDFInfo
- Publication number
- CN1876445A CN1876445A CN 200610091293 CN200610091293A CN1876445A CN 1876445 A CN1876445 A CN 1876445A CN 200610091293 CN200610091293 CN 200610091293 CN 200610091293 A CN200610091293 A CN 200610091293A CN 1876445 A CN1876445 A CN 1876445A
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- frangible portion
- gas
- ignition device
- chamber
- 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.)
- Pending
Links
Images
Landscapes
- Air Bags (AREA)
Abstract
The invention relates to a gas generator for gasbag which is characterized in that in the outer cover with gas outlet being equipped with a dependent gas generating agent, a first blast chamber and a second blast chamber of the ignition device; wherein the second blast chamber is separated from the first blast chamber with the blast chamber cover in the outer cover; the blast chamber cover is equipped with a second gas generating agent and a second ignition device; around the blast chamber being equipped with a vulnerable component, which can be cracked on the action of the second ignition device to form a gas discharging path for the second blast chamber.
Description
Technical field
The present invention relates to the gas generator for air bag that can on the passenger restraint device of automobile, use.
Background technology
(エ ア バ Star グ) uses gas generator, auto vendor to require its miniaturization and lightweight for the air bag that uses on the passenger restraint device of automobile.As the such miniaturization of reply and the method for lightweight requirements, on the basis of keeping desired performance and quality as gas generator for air bag, making designs simplification and subduing number of components is actv..
At US6,189, among Fig. 1 of 927B1 (special table 2002-503584), express the air bag inflator (イ Application Off レ one ) that is surrounded by second Room 82 in first Room 34.The gas outlet hole 104 of second Room 82 is covered by insulation smoke agent for shielding 106, and opens or break when applying authorized pressure in second Room 82.
US6,543, Fig. 1 of 805B2 expresses to have by first combustion chamber 200 of fixedly next door separation and the charging blower 10 of second combustion chamber 180.The igniting cover 220 that records in first combustion chamber 200 is pushed by the combustible product of fire lighter 222 and slip vertically.
Fig. 1 that the spy opens the 2001-199303 communique expresses the gas generator for air bag with two combustion chamber 5a, 5b.
The urgent gas generator of Te Kaiping 5-168905 communique is provided with V groove 5 on the base plate 3 of casing 1, when the action by ignition device 8 caught fire gaseous combustion propellant 2 to produce gas, base plate 3 broke and from then on discharges gas to the outside from V groove 5.
Summary of the invention
The present invention relates to a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
The combustion chamber cover parts that described second combustion chamber using is disposed in the described outer cover separate with first combustion chamber, dispose second gas generant and second ignition device in described combustion chamber cover parts,
The side face of described combustion chamber cover parts has frangible portion, and its action because of described second ignition device is ftractureed from frangible portion, is formed on the discharge path of the gas of described second combustion chamber generation.
In addition, the present invention relates to a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
Described first combustion chamber is separated into enhancing chamber that accommodates first ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in described first combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described first ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant.
In addition, the present invention relates to a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
Described first combustion chamber is separated into enhancing chamber that accommodates first ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in described first combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described first ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant,
The combustion chamber cover parts that described second combustion chamber using is disposed in the described outer cover separate with first combustion chamber, dispose second gas generant and second ignition device in described combustion chamber cover parts,
The side face of described combustion chamber cover parts has frangible portion, and its action because of described second ignition device is ftractureed from frangible portion, is formed on the discharge path of the gas of described second combustion chamber generation.
In addition, the present invention relates to a kind of gas generator for air bag, wherein,
Have combustion chamber in having the outer cover of gas discharge outlet, this combustion chamber configuration has gas generant and ignition device,
Described combustion chamber is separated into enhancing chamber that accommodates ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in the described combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant.
US6,543,805B2 and the special charging blower complex structure of opening the 2001-199303 communique can't fully be tackled the weight-saving requirement.US6,189, charging blower and the US6 of 927B1 (special table 2002-503584), 543, the charging blower structure compared that 805B2, spy open the 2001-199303 communique is simple, but the second combustion chamber using fixed parts separates with first combustion chamber with insulating element.Open in the urgent gas generator of flat 5-168905 communique the spy, since by breaking of base plate 3 from then on directly and a gas discharge gas, so the discharge rate of uncontrollable gas, thereby can not be suitable for the gas generator that dimorphism air bag with two ignition devices and combustion chamber is used.
The present invention relates to when keeping High Performance and quality, can make whole lightweight by making designs simplification, and the gas generator for air bag that Fabrication procedure is simplified.
Though combustion chamber cover parts peristome and shroud floor butt, end face promptly can with outer cover end face butt, therefore also butt not, but when the end face of combustion chamber cover parts and outer cover end face butt, carry out the fixing of combustion chamber cover parts easily is preferred.In addition, the combustion chamber cover parts are so long as can then replace separated components in the combustion chamber to cover shape and also can use cartridge.
Frangible portion is located at the side face of combustion chamber cover parts, is the low parts of intensity ratio other parts (side face beyond the frangible portion).The effect of frangible portion is to be used to make the side face cracking from the pressure of inboard.Method that frangible portion can be by making the thickness method thinner than other parts, additional wire slight crack and the method that groove is set wait and form.
Frangible portion can be provided with one or more at the side face of combustion chamber cover parts.By adjusting formation position, size and the quantity of frangible portion, the discharge velocity that the gas that may command discharges from second combustion chamber flows.
The combustion chamber cover parts are owing to separates first combustion chamber with second combustion chamber, can prevent that the gas that the burning because of the interior gas generant (first gas generant) of first combustion chamber generates from making the interior ablaze function of second gas generant of second combustion chamber so have.
Owing to bring into play such function that prevents, though being located at the effect of the frangible portion of combustion chamber cover parts side face is, because pressure from the inboard, promptly, the gas that is produced by the burning of second gas generant in second combustion chamber makes the combustion chamber cover part cracks, but can be owing to pressure from the outside, that is, and the gas that produces by the burning of first gas generant in first combustion chamber and the pressure that produces makes the combustion chamber cover part cracks.In addition, cracking is meant that the combustion chamber cover parts split and the gap that produces the degree that can discharge gas in frangible portion.
Like this, owing to the gas that produces by burning by second gas generant in second combustion chamber, the combustion chamber cover parts are ftractureed in frangible portion, thereby form the gas discharge path, therefore needn't form special gas discharge path (for example through hole that stops up by sealing arrangement).
Though strengthen chamber cap assembly peristome and shroud floor butt, end face promptly can with outer cover end face butt, also butt not, but when end face that strengthens the chamber cap assembly and outer cover end face butt, strengthen fixing of chamber cap assembly easily, so be preferred.In addition, be separated components in the combustion chamber then can be replaced covering shape and also can use cartridge as long as strengthen the chamber cap assembly.
Strengthening the chamber cap assembly is to strengthen the packing space separated components of the chamber and first gas generant.Strengthen the pressure that the chamber cap assembly is subjected to making owing to the action of first ignition device combustible product (ignition energy) of intensifier burning generation,, from then on discharge ignition energy, make first gas generant fire burns at the frangible portion cracking.Wherein, the formation position by adjusting frangible portion, size, quantity etc., the combustion performance of catching fire of may command first gas generant.
Like this, owing to enhancing chamber cap assembly is ftractureed in frangible portion by the combustible product that produces by the burning that strengthens indoor intensifier, thereby form the discharge path of combustible product, therefore needn't form special discharge path (for example through hole that stops up by sealing arrangement).
Gas generator for air bag of the present invention also can be done to become at the side face of burning cover parts and the side face both sides of enhancing chamber cap assembly has frangible portion.
Ignition device is one, and combustion chamber is one a gas generator, and is identical with foregoing invention, has frangible portion at the side face that strengthens the chamber cap assembly.Strengthen the chamber cap assembly so long as separated components in the combustion chamber then can be replaced covering shape and also can use cartridge.
In addition, the frangible portion that the gas generator for air bag that the present invention relates to is located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, and its short transverse at described side face is provided with continuously or discontinuously.
The frangible portion of groove shape of the present invention is meant straight line, curve or the elongated part that their are made up.By the frangible portion of such groove shape is set along short transverse, utilize the action of first ignition device or second ignition device that combustion chamber cover parts or enhancing chamber cap assembly are ftractureed (forming the slit that connects side face) vertically slot-shapedly, thereby form the discharge orifice of gas discharge path or ignition energy.
In addition, the gas generator for air bag that the present invention relates to, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, it circumferentially is provided with continuously or discontinuously along described side face.
The frangible portion of groove shape of the present invention is meant straight line, curve or the elongated part that their are made up.The frangible portion of this groove shape circumferentially is set by the edge, utilize the action of first ignition device or second ignition device that combustion chamber cover parts or enhancing chamber cap assembly are ftractureed (forming the slit that connects side face) slot-shapedly, thereby form the discharge orifice of gas discharge path or ignition energy.
Along circumferentially continuously or discontinuously (for example dotted line shape) under the situation of the frangible portion that the groove shape is set in a week, when the combustion chamber cover parts or strengthen the chamber cap assembly to be under pressure and be that the boundary is separated into two with the frangible portion.Therefore, combustion chamber cover parts or the end face that strengthens the chamber cap assembly not with the situation of the end face butt of outer cover under, the top of separation is moved and is flown to the outer cover top surface side.Under the situation of combustion chamber cover parts or the end face that strengthens the chamber cap assembly and outer cover end face butt, then along circumferential formation slit.
In addition, the gas generator for air bag that the present invention relates to, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, the frangible portion of described groove shape at least at one end portion has pit.
The frangible portion of the groove shape among the present invention is meant straight line, curve or the elongated part that their are made up." pit " of being located at least one end of groove is the recess of circular or shape similar with it, is the groove with the weak point of the length direction quadrature of groove or oblique (crosscut obliquely).
For example, can consider, side face (establish and highly be 100mm) at the combustion chamber cover parts, under the situation of the frangible portion of the groove that is provided with linearity along short transverse (in the length of the 50mm short transverse central portion near), when the action owing to second ignition device is ftractureed described groove, cracking length not only rests on 50mm, and can further extend from the groove end, finally arrives bottom surface (promptly more than or equal to 100mm length) from the peristome circumferential edges.Like this, under the situation that surpasses initial frangible portion length generation cracking, the combustion chamber cover components interior can not be kept the pressure of regulation, therefore might carry out the burning of gas generant by design.
But, by pit being set,, also can stop the further prolongation of cracking by pit even when arriving the end at the groove cracking in the groove end.Such pit is under the situation of groove of linearity of length 10mm in frangible portion for example, and the recess or the length that can become diameter and be the circle about 2～5mm are the groove of the linearity about 2～8mm.
In addition, the gas generator for air bag that the present invention relates to, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, the Width of described groove shape be shaped as V-arrangement.
Wherein, V-arrangement is included on the Width section of frangible portion of groove shape from combustion chamber cover parts or the inboard that strengthens chamber cap V-shaped situation and the two kinds of V-shaped situations of outside-in direction of direction laterally.In addition, the shape of the Width of groove also can be U-shaped or shape similar with it except that V-arrangement, also can be cup-shaped or shape similar with it.
Gas generator for air bag of the present invention owing to simplify the structure, so Fabrication procedure also can simplify, can make whole lightweight.
Description of drawings
The present invention can understand from following being described in detail with drawings clear ground, but they do not limit the present invention.
Fig. 1 is the axial section of gas generator;
Fig. 2 is the block diagram that is used to illustrate the frangible portion on the combustion chamber cover parts;
Fig. 3 (a)～Fig. 3 (b) is the section-drawing of the radial direction of Fig. 2;
Fig. 4 is the block diagram that is used to illustrate the frangible portion on the combustion chamber cover parts of gas generator of another way;
Fig. 5 (a)～Fig. 5 (d) is the instruction diagram of another way of the frangible portion of Fig. 4;
Fig. 6 is the axial section of the gas generator of another way.
The specific embodiment
(1) gas generator for air bag shown in Fig. 1～Fig. 3 (a) and (b)
By Fig. 1～Fig. 3 (a) and (b) explanation embodiments of the invention.Fig. 1 is the axial section of gas generator for air bag.Fig. 2 is the block diagram that is illustrated in the combustion chamber cover parts of Fig. 1 or strengthens the multiple mode when forming frangible portion on the cap assembly of chamber, and Fig. 3 (a), Fig. 3 (b) are the section-drawings of the radial direction of Fig. 2.
Gas generator for air bag 10, it utilizes diffusion shell (デ イ Off ユ one ザ Star エ Le) 12 and closed cap (Network ロ one ヅ ヤ Star エ Le) 13 is engaged incorporate outer cover 11 formation shells.Diffusion shell 12 and closed cap 13 are soldered at the junction surface.
Side face at diffusion shell 12 is provided with a plurality of gas discharge outlets 14, and gas discharge outlet 14 usefulness are stopped up from the inboard by the sealing band 15 that aluminium or corrosion-resistant steel constitute.
Be provided with two holes in the bottom surface of closed cap 13, be embedded in first ignition device 21 and second ignition device 25 in each hole, can prevent intrusion from the moisture of ambient air outside.
First ignition device 21 has first firing unit 23 that is fixed on the first firing unit lining (カ ラ one) 22, being partially submerged into the attaching parts with lead-in wire of two conductive pins 24 of extending from first firing unit 23 it is connected with battery.
Second ignition device 25 has the secondary igniter 27 that is fixed on the secondary igniter lining 26, being partially submerged into the adaptor union with lead-in wire of two conductive pins 28 of extending from secondary igniter 27 it is connected with battery.Secondary igniter lining 26 has large-diameter portion 26a and minor diameter part 26b.
In outer cover 11, be provided with first combustion chamber 31 and second combustion chamber, 35, the second combustion chambers 35 utilize combustion chamber cover parts 41 to separate with first combustion chamber 31.Among Fig. 1, be that second combustion chamber 35 is in by the state of bag in first combustion chamber 31, but also can be the state of first combustion chamber 31 and second combustion chamber, 35 adjacency.In first combustion chamber 31, be filled with the first not shown gas generant, in second combustion chamber 35, be filled with the second not shown gas generant.
Dispose enhancing chamber cap assembly 32 in first combustion chamber 31, strengthening becomes enhancing chamber 33 in the chamber cap assembly 32, accommodate the not shown intensifier and second ignition device 21 therein.
Strengthen chamber cap assembly 32, its peristome embeds in the first firing unit lining 22, peristome periphery and liner 18 butts that are disposed at outer cover 11 bottom surfaces, the end face 12a butt of bottom 32a and outer cover 11.Therefore, strengthen chamber cap assembly 32, and fix from the above-below direction pushing by end face 12a and liner 18 by the first firing unit lining, 22 location.
The combustion chamber cover parts 41 that form second combustion chamber 35 are pressed into the large-diameter portion 26a of the secondary igniter lining 26 with external diameter bigger than the internal diameter of combustion chamber cover parts 41.Like this,, carry out the location of combustion chamber cover parts 41, stop to it axially to reach moving of radial direction by combustion chamber cover parts 41 are pressed into large-diameter portion 26a.
The peristome periphery of combustion chamber cover parts 41 and liner 18 butts that are disposed at outer cover 11 bottom surfaces, the end face 12a butt of bottom 41a and outer cover 11.Therefore, combustion chamber cover parts 41 utilize end face 12a and liner 18 to fix from the above-below direction pushing.In addition, also can not use liner 18.
Be embedded at first combustion chamber 31 and be useful on the discoid baffle plate (リ テ one Na) 50 of adjusting the volume of first combustion chamber 31 according to the charging quantity of first gas generant.Baffle plate 50 has two holes, and these two holes are embedded in combustion chamber cover parts 41 and strengthen on the chamber cap assembly 32.
Dispose the filtration with burning gases and the barrel-contoured coolant filtration device 45 of refrigerating function in first combustion chamber, 31 outsides, between the outer peripheral face of coolant filtration device 45 and gas discharge outlet 14 and sealing band 15, be provided with the gap.
Be provided with the frangible portion 42 of groove shape (groove of linearity) along short transverse (outer cover 11 axially) at the side face 41b of combustion chamber cover parts 41.On the other hand, be provided with the frangible portion 34 of groove shape (groove of linearity) along short transverse (outer cover 11 axially) at the side face 32b that strengthens chamber cap assembly 32.
The frangible portion 42 of groove shape shown in Figure 1, though in the scope of bottom 41a, be provided with near the height the peristome 1/3 of distance combustion chamber cover parts 41, as shown in Figure 2, as frangible portion 42a, it also can be located near the central portion of side face, as frangible portion 42b, it also can be located in the scope of the height part of peristome about half.
Shown in Fig. 3 (a), frangible portion 42a, it is in the Width section, be the groove of the V-arrangement of direction laterally from combustion chamber cover parts 41 inboards, shown in Fig. 3 (b), frangible portion 42b is that the V-arrangement of side direction in combustion chamber cover parts 41 laterals is (when the groove with when being benchmark (Fig. 3 a) be inverted V-shaped).When being such V-arrangement of Fig. 3 (a), Fig. 3 (b) and inverted V-shaped, when the pressure that is subjected to from the outside, owing to being pressed around the opening portion of V-shaped groove the opening portion distortion is closed, therefore can be by making frangible portion 42a, 42b cracking from the pressure in the outside (gas that produces by the action of first ignition device and produce pressure).
As shown in Figure 2, frangible portion 42 also can become along the frangible portion 43c of the groove shape of circumferentially continuous (also can be discontinuous).Frangible portion 43c can become the groove of the arbitrary section shape shown in Fig. 3 (a), Fig. 3 (b).
The frangible portion 34 that strengthens chamber cap assembly 32 also can similarly form with the frangible portion 42 of combustion chamber cover parts 41.
Secondly, action when gas generator for air bag with Fig. 1 is applicable in the gas-bag system of automobile is described.In addition, the degree of the bump that first firing unit 23 and secondary igniter 27 are subjected to according to automobile when bump, the situation, first firing unit 23 action earlier of first firing unit, 23 actions only arranged and situation that the secondary igniter 27 delay-action situations and first firing unit 23 and secondary igniter 27 move simultaneously, below, to the action earlier of first firing unit 23 and secondary igniter 27 delay-action situations describe.
When being subjected to clashing at auto against, first firing unit 23 is received from the actuating signal of control unit and the igniting of moving makes intensifier fire burns.Then,, frangible portion 34 is ftractureed and the formation slit, from then in first combustion chamber 31, discharge combustible product (ignition energy) owing to strengthen the rising of the pressure in the chamber 33.
Because discharging of this combustible product makes first gas generant fire burns, thereby produce high-temperature combustion gas.After burning gases are filtered by coolant filtration device 45 and cool off, break through sealing band 15, be discharged from from gas discharge outlet 14 and make airbag inflation.At this moment, because second combustion chamber 35 is surrounded by cap assembly 41, frangible portion 42 can not ftracture owing to the pressure from the outside, and therefore the burning gases that produce at first combustion chamber 31 can not flow in second combustion chamber 35.
Secondary igniter 27 postpones a little and moves igniting, makes second gas generant fire burns and produce hi-heat burning gases.Then, the frangible portion 42 that forms the combustion chamber cover parts 41 of second combustion chamber 35 is pushed by hi-heat burning gases and ftractures, thereby forms the slit.Then, burning gases flow out from the slit, after being filtered by coolant filtration device 45 and cooling off, are discharged from from gas discharge outlet 14, further make airbag inflation.
(2) gas generator for air bag shown in Fig. 4, Fig. 5 (a)～Fig. 5 (d)
Fig. 4 is combustion chamber cover parts in the gas generator for air bag that is illustrated in Fig. 1 different modes or the block diagram that strengthens the multiple mode when forming frangible portion on the cap assembly of chamber, and Fig. 5 (a)～Fig. 5 (d) is the general view of frangible portion and other frangible portion shown in Figure 4.Below, the situation that is provided with frangible portion on the combustion chamber cover parts is described, but also can on the cap assembly of enhancing chamber, same frangible portion be set.
At the side face 41b of combustion chamber cover parts 41, the frangible portion 42c or the 42d of groove shape can be set along short transverse (outer cover 11 axially).
Though frangible portion 42c shown in Figure 4 be equivalent to shown in Fig. 5 (a) like that, also can for shown in Fig. 5 (b)～(d) like that.
Fig. 5 (b) but but shown in the cracking unit 51 that constitutes by groove of frangible portion 42e by linearity and recess 53a, the 53b at the two ends that are formed at cracking unit 51 constitute.The aspect of recess 53a, 53b be circular or with the shallow pit in the end of the approximate shape of circle.
Fig. 5 (c) but but but shown in frangible portion 42f have by cracking unit 51a that constitutes to the groove of linearity longitudinally and the cracking unit 51b that constitutes by groove with the linearity of cracking unit 51a quadrature, but be formed with pit 52a, the 52c groove of the weak point of cracking unit 51a same widths (but with) at the both ends of cracking unit 51a, but be formed with pit 52b, 52d at the both ends of cracking unit 51b the groove of the weak point of cracking unit 51b same widths (but with).
Fig. 5 (d) but but but shown in frangible portion 42g have by cracking unit 51a that constitutes to the groove of linearity longitudinally and the cracking unit 51b that constitutes by groove with the linearity of cracking unit 51a quadrature, but be formed with at the both ends of cracking unit 51a pit 53a, 53c (aspect for circular or with the shallow pit in the end of the approximate shape of circle), but be formed with at the both ends of cracking unit 51b aspect for circular recess 53b, 53d (aspect for circular or with the shallow pit in the end of the approximate shape of circle).
Secondly, action when the gas generator for air bag of Fig. 1 (its used the enhancing chamber cap assembly 32 with frangible portion 34 identical with the frangible portion 42c shown in Fig. 4, Fig. 5 (a) and the combustion chamber cover parts 41 with the frangible portion 42c shown in Fig. 4, Fig. 5 (a)) is applicable to the gas-bag system of automobile is described.Below, to the action earlier of first firing unit 23 and secondary igniter 27 delay-action situations describe.
When being subjected to clashing into when auto against, first firing unit 23 is received from the actuating signal of control unit and the igniting of moving makes intensifier fire burns.Then, owing to the rising that strengthens the pressure in the chamber 33 makes frangible portion 34 crackings, form the slit, and from then in first combustion chamber 31, discharge combustible product (ignition energy).
At this moment, because frangible portion 34 is identical with frangible portion 42c shown in Figure 4, so utilize Fig. 4 that the cracking state is described, even but under the situation that cracking unit 51 integral body ftracture along its length, also can stop further cracking by the part of pit 52a, the 52b at both ends to length direction.Therefore, but exceedingly do not ftracture, can keep according to the design-calculated fired state so strengthen cap assembly 32 inside, chamber owing to can not surpass the length of cracking unit 51.
Owing to discharge this combustible product, make first gas generant fire burns and produce hi-heat burning gases.Burning gases break through sealing band 15 after being filtered by coolant filtration device 45 and cooling off, be discharged from from gas discharge outlet 14, make airbag inflation.At this moment, because second combustion chamber 35 is surrounded by cap assembly 41, so frangible portion 42 can not ftracture because of the pressure from the outside, therefore the burning gases that produce at first combustion chamber 31 can not flow in second combustion chamber 35.
Secondary igniter 27 a little lingeringly moves and lights a fire, and makes second gas generant fire burns and produce hi-heat burning gases.Then, the frangible portion 42 that forms the combustion chamber cover parts 41 of second combustion chamber 35 is pushed by hi-heat burning gases and ftractures, and forms the slit.Then, burning gases flow out from the slit, and after being filtered by coolant filtration device 45 and cooling off, are discharged from from gas discharge outlet 14, further make airbag inflation.
At this moment, even but frangible portion 42c under the situation that cracking unit 51 ftractures along its length, also can stop further cracking by the part of pit 52a, the 52b at both ends to length direction.Therefore, but exceedingly do not ftracture, so the design-calculated fired state can be kept in combustion chamber cover parts 41 inside owing to can not surpass the length of cracking unit 51.
(3) gas generator for air bag shown in Figure 6
Fig. 6 is that combustion chamber is the longitudinal diagram of one gas generator for air bag.
Gas generator for air bag 100 utilizes diffusion shell 112 and closed cap 113 are engaged incorporate outer cover 111 formation shells.Diffusion shell 112 and closed cap 113 are soldered at the junction surface.
Side face at diffusion shell 112 is provided with a plurality of gas discharge outlets 114, and gas discharge outlet 114 utilizes the sealing band 115 that is made of aluminium or corrosion-resistant steel to stop up from the inboard.
Be provided with a hole in the bottom surface of closed cap 113, be embedded in ignition device 121 in the hole can prevent intrusion from the moisture of ambient air outside.
In outer cover 111, be provided with combustion chamber 131, in first combustion chamber 131, be filled with the first not shown gas generant.
Dispose enhancing chamber cap assembly 132 in combustion chamber 131, strengthening becomes enhancing chamber 133 in the chamber cap assembly 132, accommodate the intensifier 134 of filling in aluminium vessel therein.
Strengthen chamber cap assembly 132, its peristome is embedded in the firing unit lining 122, and peristome periphery 136 is outstanding laterally from the hole of being located at closed cap 113 bottom surfaces, by peristome periphery 136 is riveted and attachment point firearm lining 122.In addition, peristome periphery 136 clips fixing by the flange part 113a in the hole that forms closed cap 113.Strengthen the bottom 132a of chamber cap assembly 132 and the end face 112a butt of outer cover 111.
Dispose the ring-shaped baffle that is used for adjusting according to the charging quantity of gas generant the volume of combustion chamber 131 in combustion chamber 131, baffle plate can be inlayed and be installed in and strengthen on the chamber cap assembly 132.
Dispose the filtration with burning gases and the barrel-contoured coolant filtration device 145 of refrigerating function in the outside of combustion chamber 131, between the outer peripheral face of coolant filtration device 145 and gas discharge outlet 114 and sealing band 115, be provided with the gap.
Be provided with the frangible portion 42c of groove shape shown in Figure 4 (groove of linearity) along short transverse (outer cover 111 axially) at the side face 132b that strengthens chamber cap assembly 132.Frangible portion 42c can adopt the mode shown in Fig. 5 (b)～(d).
Secondly, action when gas generator for air bag (its use has the enhancing chamber cap assembly 132 of the frangible portion identical with the frangible portion 42c shown in Fig. 4, Fig. 5 (a)) with Fig. 6 is applicable to the gas-bag system of automobile is described.
When being subjected to clashing into when auto against, firing unit 123 receives from the actuating signal of control unit and the igniting of moving, make intensifier 134 fire burns.Then, owing to strengthen the rising of chamber 133 internal pressures, make frangible portion 42c cracking and the formation slit, and from then in combustion chamber 131, discharge combustible product (ignition energy).
At this moment, the cracking state of frangible portion 42c is described, but promptly is under the situation of the whole end wises cracking of cracking unit 51, also can stop further cracking by the part of pit 52a, the 52b at both ends to length direction.Therefore, but exceedingly do not ftracture, can keep according to the design-calculated fired state so strengthen cap assembly 132 inside, chamber owing to can not surpass the length of cracking unit 51.
Owing to discharge this combustible product, make gas generant fire burns and produce hi-heat burning gases.Burning gases break through sealing band 115 and are discharged from from gas discharge outlet 114 after being filtered by coolant filtration device 145 and cooling off, and make airbag inflation.
Though describe the present invention, it is conspicuous that the present invention can adopt various modes.And such distortion all can not be regarded as a departure from idea of the present invention and scope, and various for a person skilled in the art changes are conspicuous, but these changes are included in the scope of technical solution of the present invention.
Claims (8)
1, a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
The combustion chamber cover parts that described second combustion chamber using is disposed in the described outer cover separate with first combustion chamber, dispose second gas generant and second ignition device in described combustion chamber cover parts,
The side face of described combustion chamber cover parts has frangible portion, and its action because of described second ignition device is ftractureed from frangible portion, and is formed on the discharge path of the gas of described second combustion chamber generation.
2, a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
Described first combustion chamber is separated into enhancing chamber that accommodates first ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in described first combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described first ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant.
3, a kind of gas generator for air bag, wherein,
Have first combustion chamber and second combustion chamber in having the outer cover of gas discharge outlet, this first combustion chamber and second combustion chamber dispose gas generant and ignition device alone respectively,
Described first combustion chamber is separated into enhancing chamber that accommodates first ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in described first combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described first ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant,
The combustion chamber cover parts that described second combustion chamber using is disposed in the described outer cover separate with first combustion chamber, dispose second gas generant and second ignition device in described combustion chamber cover parts,
The side face of described combustion chamber cover parts has frangible portion, and its action because of described second ignition device is ftractureed from frangible portion, and is formed on the discharge path of the gas of described second combustion chamber generation.
4, a kind of gas generator for air bag, wherein,
Have combustion chamber in having the outer cover of gas discharge outlet, this combustion chamber configuration has gas generant and ignition device,
Described combustion chamber is separated into enhancing chamber that accommodates ignition device and intensifier and the space that accommodates gas generant by the enhancing chamber cap assembly that is disposed in the described combustion chamber,
The side face of described enhancing chamber cap assembly has frangible portion, and its action because of described ignition device is ftractureed from frangible portion, discharges combustible product in the space that accommodates described gas generant.
5, as each the described gas generator for air bag in the claim 1～4, it is characterized in that, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, and its short transverse along described side face is provided with continuously or discontinuously.
As each the described gas generator for air bag in the claim 1～4, it is characterized in that 6, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, it circumferentially is provided with continuously or discontinuously along described side face.
As each the described gas generator for air bag in the claim 1～4, it is characterized in that 7, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, the frangible portion of described groove shape at least at one end portion has pit.
As each the described gas generator for air bag in the claim 1～4, it is characterized in that 8, the frangible portion of being located at the side face of described combustion chamber cover parts or described enhancing chamber cap assembly is the groove shape, the Width of described groove be shaped as V-arrangement.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005168510 | 2005-06-08 | ||
| JP168510/05 | 2005-06-08 | ||
| JP306591/05 | 2005-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1876445A true CN1876445A (en) | 2006-12-13 |
Family
ID=37509062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610091293 Pending CN1876445A (en) | 2005-06-08 | 2006-06-08 | Gas generator of airbag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1876445A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102124297A (en) * | 2009-01-15 | 2011-07-13 | 大赛璐化学工业株式会社 | Gas generator for restraining device of vehicle |
| CN103857566A (en) * | 2011-10-24 | 2014-06-11 | 株式会社大赛璐 | Gas generator for restraining device |
-
2006
- 2006-06-08 CN CN 200610091293 patent/CN1876445A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102124297A (en) * | 2009-01-15 | 2011-07-13 | 大赛璐化学工业株式会社 | Gas generator for restraining device of vehicle |
| CN102124297B (en) * | 2009-01-15 | 2013-09-25 | 大赛璐化学工业株式会社 | Gas generator for restraining device of vehicle |
| CN103857566A (en) * | 2011-10-24 | 2014-06-11 | 株式会社大赛璐 | Gas generator for restraining device |
| CN103857566B (en) * | 2011-10-24 | 2016-11-23 | 株式会社大赛璐 | Gas generator for restraint device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101041345A (en) | Gas generator for occupant restraining device for vehicle | |
| CN1642791A (en) | Gas generator | |
| CN1304224C (en) | Gas generator | |
| CN1395503A (en) | Gas generator | |
| CN1598407A (en) | Combustor dome assembly of a gas turbine engine having a free floating swirler | |
| CN1128077C (en) | Air bag gas generator and air bag device | |
| US8302992B2 (en) | Gas generator and assembling method of the same | |
| CN1863695A (en) | Gas producer | |
| CN1590734A (en) | Gas turbine combustor | |
| US8720944B2 (en) | Gas generator for restraining device of vehicle | |
| US8424909B2 (en) | Gas generator for restraining device of vehicle | |
| CN103140389A (en) | Gas generator | |
| CN1598408A (en) | Combustor dome assembly of a gas turbine engine having improved deflector plates | |
| MXPA05001416A (en) | Dual stage pyrotechnic driver inflator. | |
| CN102124297B (en) | Gas generator for restraining device of vehicle | |
| CN104245437A (en) | Gas generator | |
| CN105339215A (en) | Gas generator for occupant restraining device | |
| CN1166156A (en) | Hybrid air bag system having an improved hybrid inflator | |
| CN1863696A (en) | Gas producer | |
| CN101044369A (en) | Initiator including a zone of weakness | |
| CN1823255A (en) | Pyrotechnical system, pyrotechnical object and burn off method | |
| CN109641567A (en) | Gas generator | |
| CN1876445A (en) | Gas generator of airbag | |
| WO2019017229A1 (en) | Gas generator | |
| US20050189755A1 (en) | Gas generator for air bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20061213 |