JPS6350203Y2 - - Google Patents
Info
- Publication number
- JPS6350203Y2 JPS6350203Y2 JP1983100941U JP10094183U JPS6350203Y2 JP S6350203 Y2 JPS6350203 Y2 JP S6350203Y2 JP 1983100941 U JP1983100941 U JP 1983100941U JP 10094183 U JP10094183 U JP 10094183U JP S6350203 Y2 JPS6350203 Y2 JP S6350203Y2
- Authority
- JP
- Japan
- Prior art keywords
- surge
- air bag
- voltage
- power supply
- supply circuit
- 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.)
- Expired
Links
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000003213 activating effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
Landscapes
- Air Bags (AREA)
Description
【考案の詳細な説明】
技術分野
この考案は高速移動物体、特に自動車において
その衝突時に乗員保護を行うエアバツク装置に関
する。[Detailed Description of the Invention] Technical Field The present invention relates to an airbag device for protecting occupants in the event of a collision with a high-speed moving object, particularly a car.
背景技術
この種エアバツク装置においては、急峻な衝撃
を検知したときに***に通電し、エアバツクを展
開させるための爆薬に点火してガス発生装置を作
動させ、そのガス圧を貯蔵して乗員を拘束する構
成のものが一般的に知られている。例えば、第１
図は従来一般に用いられている自動車のエアバツ
ク装置の回路例であり、図に於いて、１は自動車
の直流バツテリ、２は自動車のキースイツチと連
動して開閉するイグニツシヨンスイツチである。
３は大容量のアルミ電解コンデンサからなるバツ
クアツプ電源のコンデンサ、４はコンデンサ３の
充電用抵抗、５は一方向通電用ダイオードであ
り、バツクアツプコンデンサ３はスイツチ２の閉
成時抵抗４、ダイオード５を介してほゞバツテリ
１の電圧まで充電される。６はコンデンサ３の放
電用ダイオードであり、これらでエアバツク装置
の直流電源回路７を構成している。８，８ａ，８
ｂ及び９は自動車の衝突を検知して***１０の通
電路を形成する衝突検知器をなす機械接点式のＧ
センサで、自動車の減速度が所定以上になると接
点と閉じる周知の常開型のものである。これらＧ
センサ８，９は衝突検出に冗長度と確実性をもた
せるため複数個配置され、例えばＧセンサ８は自
動車の前部２個所に、又Ｇセンサ９はシヤーシ中
央部というように分散配置され、エアバツク装置
の誤動作を防止している。１１はＧセンサ８及び
９の接点に並列接続されたモニタ用の抵抗であ
り、Ｇセンサ８と***１０の接続点Ａより導出し
た図示しない故障検出回路に回路電圧を与えて雷
管１０の断線や回路オープン等の故障検出に用い
るものである。BACKGROUND TECHNOLOGY In this type of air bag device, when a sudden impact is detected, the detonator is energized, ignites the explosive to deploy the air bag, activates the gas generator, and stores the gas pressure to restrain the occupant. It is generally known that the configuration is as follows. For example, the first
The figure shows an example of a circuit of a conventional automobile air bag system. In the figure, 1 is a direct current battery of the automobile, and 2 is an ignition switch that opens and closes in conjunction with the automobile's key switch.
3 is a backup power supply capacitor consisting of a large-capacity aluminum electrolytic capacitor, 4 is a charging resistor for capacitor 3, 5 is a diode for one-way conduction, and backup capacitor 3 is connected to resistor 4 and diode 5 when switch 2 is closed. It is charged to approximately the voltage of battery 1 through the battery. 6 is a diode for discharging the capacitor 3, which constitutes a DC power supply circuit 7 of the air bag device. 8,8a,8
b and 9 are mechanical contact type Gs forming a collision detector that detects a collision of a car and forms an energizing path for the detonator 10;
The sensor is a well-known normally open type sensor that closes its contacts when the deceleration of the vehicle exceeds a predetermined value. These G
A plurality of sensors 8 and 9 are arranged in order to provide redundancy and reliability in collision detection. For example, the G sensor 8 is arranged in two places at the front of the car, and the G sensor 9 is arranged in the center of the chassis. Prevents equipment malfunction. Reference numeral 11 denotes a monitoring resistor connected in parallel to the contacts of the G sensors 8 and 9, which applies a circuit voltage to a failure detection circuit (not shown) derived from the connection point A between the G sensor 8 and the detonator 10 to prevent disconnection of the detonator 10. This is used to detect failures such as open circuits.
すなわち、これらのＧセンサ８，９、***１０
及びモニタ用抵抗１１は自動車の衝突時、衝撃を
検知してエアバツクを展開するためのエアバツク
の駆動回路１２を構成している。 That is, these G sensors 8, 9, detonator 10
The monitoring resistor 11 constitutes an air bag drive circuit 12 for detecting impact and deploying the air bag when a car crashes.
かゝる構成の自動車のエアバツク装置はＧセン
サ８，９が自動車の急峻な衝撃を検知してその接
点を閉じると、***１０に所定の電流が通電され
てエアバツクが展開される。 In the automobile air bag system having such a structure, when the G sensors 8 and 9 detect a sudden impact of the automobile and close their contacts, a predetermined current is applied to the detonator 10 and the air bag is deployed.
又、Ｇセンサ８，９には夫々モニタ抵抗１１，
１１が並列接続されているため、***１０が万一
断線したり、回路オープンしていてもこれが適確
に検出され、ドライバーに報知して警告される。 Furthermore, the G sensors 8 and 9 are provided with monitor resistors 11 and 9, respectively.
11 are connected in parallel, even if the detonator 10 were to break or the circuit was open, this would be accurately detected and the driver would be alerted.
しかしながら、このようにエアバツクの展開動
作を確実になし、且つＧセンサにモニタ抵抗を並
置して故障検出を図つた従来の自動車のエアバツ
ク装置も、モニタ抵抗等で故障検出させるが故
に、衝突事故を起していない通常の走行時に誤動
作してエアバツクが展開するという事故があつ
た。即ち、自動車にはフアンを始め多数のリアク
タンス負荷が直流バツテリ１に接続されており、
これらの負荷回路の開閉時高い誘導電圧を誘起し
て、エアバツク装置の直流電源回路７にサージ電
圧が瞬間的に印加される。このため、Ｇセンサ
８，９が衝撃を感知しないで、その接点を開いて
いるにも拘わらず、これらのモニタ抵抗１１を通
して***１０を起暴させるためと考えられる。こ
のため、モニタ抵抗１１を直流電源回路７がかゝ
る高電圧のサージを受けても***１０が暴発しな
い程度に充分に大きく設定することも考えられる
が、サージ電圧それ自体の大きさが不確定である
ばかりでなく、モニタ抵抗１１の抵抗値を余り大
きくすると故障検出精度が悪るくなり、且つ高価
な検出装置を使用する必要があつた。 However, conventional automobile airbag systems that ensure airbag deployment and detect failures by placing a monitor resistor in parallel with the G sensor also use monitor resistors to detect failures, which can lead to collisions. There was an accident in which the airbag malfunctioned and deployed during normal driving. In other words, a large number of reactance loads including a fan are connected to a DC battery 1 in an automobile.
When these load circuits are opened and closed, a high induced voltage is induced, and a surge voltage is instantaneously applied to the DC power supply circuit 7 of the air bag device. This is considered to be because the detonator 10 is activated through these monitor resistors 11 even though the G sensors 8 and 9 do not sense an impact and their contacts are open. For this reason, it is possible to set the monitor resistor 11 sufficiently large so that the detonator 10 will not explode even if the DC power supply circuit 7 receives such a high voltage surge, but the magnitude of the surge voltage itself may be insufficient. Not only is it certain, but if the resistance value of the monitor resistor 11 is made too large, failure detection accuracy deteriorates and it is necessary to use an expensive detection device.
従つて、例えば特開昭55−1205号公報に開示さ
れているように、直流電源回路にツエナーダイオ
ードを並列接続することによつて、サージ電圧を
ツエナーダイオードにて吸収することが提案され
ている。 Therefore, for example, as disclosed in Japanese Patent Application Laid-open No. 1205-1983, it has been proposed to connect Zener diodes in parallel to a DC power supply circuit so that the surge voltage can be absorbed by the Zener diode. .
この提案によれば、仮にサージ電圧が発生して
も、それがツエナーダイオードに吸収されるため
に、電管の暴発を効果的に防止することができる
のみならず、モニタ抵抗１１の抵抗値を不所望に
大きくする必要がなくなり、故障検出精度の低下
も防止しうる。 According to this proposal, even if a surge voltage occurs, it is absorbed by the Zener diode, which not only effectively prevents the tube from exploding, but also reduces the resistance value of the monitor resistor 11. There is no need to make it undesirably large, and a decrease in failure detection accuracy can also be prevented.
しかし乍ら、提案では２個のツエナーダイオー
ドが直流電源回路にそれぞれ別個に並列接続され
ているので、仮に一方のツエナーダイオードが短
絡故障した場合には電管の正常な動作が期待でき
なくなると重大な問題がある。 However, in the proposal, two Zener diodes are connected separately in parallel to the DC power supply circuit, so if one Zener diode were to fail due to a short circuit, the normal operation of the tube would be seriously compromised. There is a problem.
考案の開示
従つて、本考案は上記問題点に鑑み提案された
ものであり、モニタ抵抗の抵抗値を必要以上に大
きくすることなく、即ち故障検出機能を低下させ
ることなくエアバツクの展開動作が確実になされ
る自動車のエアバツク装置を提供することを目的
とする。DISCLOSURE OF THE INVENTION Therefore, the present invention was proposed in view of the above-mentioned problems, and it is possible to ensure the airbag deployment operation without increasing the resistance value of the monitor resistor more than necessary, that is, without reducing the failure detection function. The purpose of the present invention is to provide an air bag device for an automobile.
すなわち、本考案は直流電源回路に、通電によ
りエアバツクを作動させる起動手段と衝突を検知
して起動手段の通電回路を形成するスイツチ手段
とを直列接続すると共に、直流電源回路にサージ
吸収素子を並列接続したエアバツク装置におい
て、前記サージ吸収素子は２個のツエナーダイオ
ードを直列接続し、かつそれぞれのツエナーダイ
オードにモニタ抵抗を並列接続して構成し、各ツ
エナーダイオードの接続点の電圧を監視するよう
にしたことを特徴とする。 That is, the present invention connects a DC power supply circuit in series with a starting means that activates the air bag by energizing it, and a switch means that detects a collision and forms a current supply circuit for the starting means, and also connects a surge absorbing element in parallel with the DC power supply circuit. In the connected air bag device, the surge absorption element is configured by connecting two Zener diodes in series and connecting a monitor resistor in parallel to each Zener diode, so as to monitor the voltage at the connection point of each Zener diode. It is characterized by what it did.
この考案によれば、サージ吸収素子はツエナー
ダイオード、モニタ抵抗にて構成されている関係
で、高い正又は負のサージ電圧が印加されてもこ
のサージ吸収素子で吸収される。従つて、エアバ
ツク装置のサージによる誤動作が解消されると共
に、センサ装置に並置するモニタ抵抗に抵抗値の
小さいものを利用することが出来故障検出精度や
信頼性の高いエアバツク装置が提供出来る。 According to this invention, the surge absorbing element is composed of a Zener diode and a monitor resistor, so that even if a high positive or negative surge voltage is applied, it is absorbed by the surge absorbing element. Therefore, malfunctions of the air bag device due to surges are eliminated, and a monitor resistor with a small resistance value can be used as the monitor resistor arranged in parallel with the sensor device, so that an air bag device with high failure detection accuracy and reliability can be provided.
考案を実施するための最良の形態
第２図は本考案に係る自動車のエアバツク装置
の回路例であり、サージ吸収素子を用いたものが
示されている。尚、こゝで第１図と同じ機能部品
は同一記号で示し簡単のためその説明を略す。即
ち、第２図に於いて第１図と異なる点は、主電源
の直流バツテリ１や補助電源のバツクアツプコン
デンサ３等からなる直流電源回路７に***１０や
Ｇセンサ８，９の直列接続体１２を接続した従来
の回路に加えて、サージ吸収素子１３を直流電源
回路７に上記直列接続体１２と並列に接続したも
のである。同図に於いて、サージ吸収素子１３は
２個のツエナーダイオード１３ａ，１３ｂとモニ
タ抵抗１４ａ，１４ｂとから構成されており、具
体的には例えば耐圧が直流バツテリ１の電圧より
僅かに高くサージ耐量の大きいジヤイアントツエ
ナーダイオードが用いられ、素子破壊等に対処す
るため２個１３ａ，１３ｂが直列接続され、各々
モニタ抵抗１４，１４ａ，１４ｂが並列接続され
ている。BEST MODE FOR CARRYING OUT THE INVENTION FIG. 2 is a circuit example of an air bag device for an automobile according to the present invention, which uses a surge absorbing element. Note that the same functional parts as in FIG. 1 are indicated by the same symbols and their explanations are omitted for the sake of simplicity. That is, the difference between FIG. 2 and FIG. 1 is that a detonator 10 and a series connection body of G sensors 8 and 9 are connected to a DC power supply circuit 7 consisting of a DC battery 1 as a main power source and a backup capacitor 3 as an auxiliary power source. In addition to the conventional circuit in which 12 is connected, a surge absorbing element 13 is connected to the DC power supply circuit 7 in parallel with the series connection body 12. In the figure, the surge absorbing element 13 is composed of two Zener diodes 13a, 13b and monitor resistors 14a, 14b. Specifically, for example, the surge absorption element 13 has a surge resistance whose withstand voltage is slightly higher than the voltage of the DC battery 1. Two giant Zener diodes 13a and 13b are connected in series to prevent element breakdown, and monitor resistors 14, 14a and 14b are connected in parallel, respectively.
このような構成によれば、直流電源回路７に異
常に高いサージ電圧が印加されても、エアバツク
の駆動回路１２に付与される電圧はジヤイアント
ツエナーダイオード１３ａ，１３ｂのブレークダ
ウン電圧で決められる電圧値以上に上昇すること
はなく、***１０の暴発が防止される。即ち、今
直流バツテリ１の電圧に加え正のサージが印加さ
れる場合、このサージ分は２個直列のジヤイアン
トチエナーダイオード１３の耐圧値に押えられ、
エアバツク駆動回路７には所定値以上の電流は流
れることはない。又、負のサージが印加されると
きはジヤイアントチエナーダイオード１３の正方
向電圧降下分であり、同様にエアバツク駆動回路
７には殆んど電流は流れず、サージ電圧によるエ
アバツク誤動作の展開は完全に解消される。又、
各サージ吸収のツエナーダイオード１３ａ，１３
ｂにモニター抵抗１４を並設しているから、両ダ
イオード１３ａ，１３ｂの接続点Ｂの電圧を監視
することによりサージ吸収素子１３の故障監視が
なされる。更に、サージ吸収素子２個を直列接続
した構成にしたから仮に一個故障しても、同様に
機能させることが出来、エアバツク装置の誤動作
防止の信頼性が向上する。 According to such a configuration, even if an abnormally high surge voltage is applied to the DC power supply circuit 7, the voltage applied to the airbag drive circuit 12 is determined by the breakdown voltage of the giant Zener diodes 13a and 13b. The value will not rise above the value, and the explosion of the detonator 10 will be prevented. That is, when a positive surge is applied in addition to the voltage of the DC battery 1, this surge is suppressed by the withstand voltage value of the two giant chainer diodes 13 in series,
A current exceeding a predetermined value does not flow through the airbag drive circuit 7. Furthermore, when a negative surge is applied, it is due to the voltage drop in the positive direction of the giant chainer diode 13, and similarly, almost no current flows through the airbag drive circuit 7, and the development of airbag malfunction due to the surge voltage is completely resolved. or,
Zener diodes 13a and 13 for each surge absorption
Since the monitor resistor 14 is arranged in parallel at the terminal B, failures in the surge absorbing element 13 can be monitored by monitoring the voltage at the connection point B between both diodes 13a and 13b. Furthermore, since two surge absorbing elements are connected in series, even if one of the surge absorbing elements fails, it can still function in the same way, improving the reliability of preventing malfunctions of the air bag device.
第１図は従来のエアバツク装置の回路図、第２
図は本考案のエアバツク装置の回路図である。
７……直流電源回路、８，９……スイツチ手段
（Ｇセンサ）、１０……起動手段（***）、１３…
…サージ吸収素子、１３ａ，１３ｂ……ツエナー
ダイオード、１４ａ，１４ｂ……モニタ抵抗、Ｂ
……接続点。
Figure 1 is a circuit diagram of a conventional air bag device, Figure 2 is a circuit diagram of a conventional airbag device.
The figure is a circuit diagram of the air bag device of the present invention. 7... DC power supply circuit, 8, 9... Switch means (G sensor), 10... Starting means (detonator), 13...
...Surge absorption element, 13a, 13b... Zener diode, 14a, 14b... Monitor resistor, B
...connection point.
Claims (1)
させる起動手段と衝突を検知して起動手段の通電
路を形成するスイツチ手段とを直列接続すると共
に、直流電源回路にサージ吸収素子を並列接続し
たエアバツク装置において、前記サージ吸収素子
は２個のツエナーダイオードを直列接続し、かつ
それぞれのツエナーダイオードにモニタ抵抗を並
列接続して構成し、各ツエナーダイオードの接続
点の電圧を監視するようにしたことを特徴とする
自動車のエアバツク装置。 An airbag device in which a DC power supply circuit is connected in series with a starting means for activating the airbag by energization and a switch means for detecting a collision and forming a current conducting path for the starting means, and a surge absorbing element is connected in parallel with the DC power supply circuit. , the surge absorption element is configured by connecting two Zener diodes in series and connecting a monitor resistor in parallel to each Zener diode, so that the voltage at the connection point of each Zener diode is monitored. Automobile air bag device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10094183U JPS608167U (en) | 1983-06-29 | 1983-06-29 | Automobile airbag device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10094183U JPS608167U (en) | 1983-06-29 | 1983-06-29 | Automobile airbag device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS608167U JPS608167U (en) | 1985-01-21 |
| JPS6350203Y2 true JPS6350203Y2 (en) | 1988-12-23 |
Family
ID=30238577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10094183U Granted JPS608167U (en) | 1983-06-29 | 1983-06-29 | Automobile airbag device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608167U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01234463A (en) * | 1987-12-21 | 1989-09-19 | Shell Internatl Res Maatschappij Bv | Polyketone polymer composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS636776U (en) * | 1986-06-30 | 1988-01-18 | ||
| JPH0639477Y2 (en) * | 1989-09-08 | 1994-10-12 | 富士通株式会社 | Pin number identification mark for integrated circuit parts |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS551205A (en) * | 1978-06-16 | 1980-01-08 | Hitachi Ltd | Monitoring device of air cushion |
-
1983
- 1983-06-29 JP JP10094183U patent/JPS608167U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS551205A (en) * | 1978-06-16 | 1980-01-08 | Hitachi Ltd | Monitoring device of air cushion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01234463A (en) * | 1987-12-21 | 1989-09-19 | Shell Internatl Res Maatschappij Bv | Polyketone polymer composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS608167U (en) | 1985-01-21 |
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