JPS6117916A - Knock sensor - Google Patents
Knock sensorInfo
- Publication number
- JPS6117916A JPS6117916A JP13842984A JP13842984A JPS6117916A JP S6117916 A JPS6117916 A JP S6117916A JP 13842984 A JP13842984 A JP 13842984A JP 13842984 A JP13842984 A JP 13842984A JP S6117916 A JPS6117916 A JP S6117916A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- piezoelectric ceramic
- diaphragm
- box body
- connector unit
- 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
- 239000000919 ceramic Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000011888 foil Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 8
- 235000014676 Phragmites communis Nutrition 0.000 abstract 2
- 239000011810 insulating material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、内燃機関の省燃費およびパワーアップを目的
とした点火時期制御システムに用いるノ２べ５
ックセンサ、すなわちノッキングによって生じるエンジ
ン特有の振動を検知するノンクセンザに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a knock sensor used in an ignition timing control system for the purpose of reducing fuel consumption and increasing power of an internal combustion engine. This is about nonkusenza.
従来例の構成とその問題点
従来、第１図に示すようなノッキングに伴う機関振動を
検出するセンサが提案されている。即ち、ケース本体１
に固着したケースカバー２の内面略中火に支持台３を形
成し、ボルト４及びこれに螺合するナツト５を用いて、
円板状の振動板６を固定している。振動板６は、金属板
７と両面に電極８’ａ、８ｂを形成した圧電素子９を接
着しており、その中央に設けた透孔をボルト４に挿通し
た上でリテーナ１０を介してナツト５により締付けられ
ている。１１は絶縁プツシ３＝である。Conventional Structure and Problems Conventionally, a sensor for detecting engine vibration due to knocking as shown in FIG. 1 has been proposed. That is, the case body 1
A support base 3 is formed on the inner surface of the case cover 2 which is fixed to the middle surface, and using a bolt 4 and a nut 5 screwed into the support base 3,
A disc-shaped diaphragm 6 is fixed. The diaphragm 6 has a metal plate 7 and a piezoelectric element 9 with electrodes 8'a and 8b formed on both sides bonded together, and a bolt 4 is inserted through a through hole provided in the center of the diaphragm 6, and then a nut is inserted through a retainer 10. It is tightened by 5. 11 is an insulating pusher 3=.
このだめ、ケース本体１から入力される振動により振動
板６が膜振動すると、圧電素子９が変形され、両電極８
ａ、８ｂ間に電位差が発生する。However, when the diaphragm 6 vibrates due to the vibration input from the case body 1, the piezoelectric element 9 is deformed, and both electrodes 8
A potential difference occurs between a and 8b.
一方の電極８ａは金属板７及びケースカバー２を通して
アースされ、他方の電極８１）はリテーナ１０、ナツト
５を通１７てボルト４に接続しているため、この電位差
はボルト４とアース間に出力される。One electrode 8a is grounded through the metal plate 7 and the case cover 2, and the other electrode 81) is connected to the bolt 4 through the retainer 10 and the nut 5 at 17, so this potential difference is output between the bolt 4 and the ground. be done.
そして、このような振動センサにあっては、振動板６の
共振周波数を機関のソツキング周波数に一致させ、ノソ
ギング振動を増幅して精度よく検出できるようにしてい
るのが一般的である。In such a vibration sensor, the resonant frequency of the diaphragm 6 is generally made to match the engine's settling frequency, so that the nosogging vibration can be amplified and detected with high accuracy.
しかしながら、上記従来例においては以下に示す欠点が
あった。However, the above conventional example had the following drawbacks.
（１＋ ボルト４．ナツト５で圧電素子９と金属板７
を機械的に押さえ付けて固定するため、リテーナ１０が
保護しているものの圧電素子９を破壊する危険性があり
、かつ、共振周波数を精度良く決定できないとか、耐久
後の変動が大きいという問題を有している。(1+ Bolt 4. Nut 5 connects piezoelectric element 9 and metal plate 7.
Since the piezoelectric element 9 is mechanically pressed down and fixed, there is a risk of destroying the piezoelectric element 9 which is protected by the retainer 10, and there is also the problem that the resonant frequency cannot be determined with high accuracy or that fluctuations after durability are large. have.
（２）圧電素子９と金属板７を導電性の接着剤（耐熱性
が悪い）で貼合わせているため、温度に対する共振周波
数、出力電圧等の特性の変動が太きい。(2) Since the piezoelectric element 9 and the metal plate 7 are bonded together using a conductive adhesive (poor heat resistance), characteristics such as resonance frequency and output voltage vary widely with respect to temperature.
（３）圧電素子９の熱膨張係数と同一とするため、金属
板７の制質にアンバ（１，２Ｘ １０′／”Ｃ）を選択
しているが、これは圧電素子９の熱膨張係数を１．５
Ｘ ］ Ｏ＝／”Ｃと誤っており、温度に対する特性変
動、耐久径変動が太きい。（普通の七ラミック（いわゆ
る、アルミナ）であれば、１〜５Ｘ １０−６／℃であ
るが、圧電セラミックは７〜１１×１０−６／°Ｃであ
る。）
発明の目的
本発明は一］二記従来例の欠点を除去するものであり、
温度に対する変動、耐久試験に対する変動を小さくして
耐環境性、信頼性に富み、寸だ製造上は、圧電セラミッ
クに対する機械的ストレスをなくし、圧電セラミックの
破壊等の製造上のトラブルを皆無にすることを目的とす
るものである。(3) In order to make the thermal expansion coefficient the same as that of the piezoelectric element 9, umber (1,2X 10'/''C) is selected as the material for the metal plate 7; 1.5
X ] O=/”C is incorrect, and the variation in characteristics and durability diameter with respect to temperature are large. (For ordinary hexaramic (so-called alumina), it is 1 to 5X 10-6/℃, The piezoelectric ceramic has a temperature of 7 to 11 x 10-6/°C.Objectives of the InventionThe present invention eliminates the drawbacks of the prior art as described in (1) and (2) above.
It has excellent environmental resistance and reliability by reducing fluctuations due to temperature and durability tests, and eliminates mechanical stress on the piezoelectric ceramic during manufacturing, eliminating manufacturing troubles such as destruction of the piezoelectric ceramic. The purpose is to
発明の構成
本発明は上記目的を達成するために、振動板を基板の突
起に溶接し、まだ振動板の材質として、圧電セラミック
の熱膨張係数とほぼ等しい熱膨張係数を有するニッケル
４５％を主成分とする鉄−ニノケル合金とするものであ
る。Structure of the Invention In order to achieve the above object, the present invention has a diaphragm welded to a protrusion of a substrate, and the diaphragm is made mainly of 45% nickel, which has a thermal expansion coefficient almost equal to that of piezoelectric ceramic. It is made of iron-Ninokel alloy as a component.
実施例の説明
５へ−７
以下に本発明の一実施例について説明する。第３図〜第
５図において、１２は一端が開口した筐体であり、この
筐体１２の外周面はボルトのように６面を有する。１３
は筐体１２の下部に一体に形成きれたネジ部であり、こ
のネジ部１３がエンジンのネジ穴に螺合される。Ｉ４は
導電性の基板であり、この基板１４の一端には複数の凸
部１５が形成され、丑だ基板１４の他端の中央には円錐
台形状の突起１６が形成されている。１７は基板１４お
よび突起１６を貫通するように形成された孔である。１
８は４５％ニッケルを主成分とする鉄−ニノケル合金の
金属性の振動板であり、この振動板１８の中心には孔が
形成されている。この振動板１８は上記基板１４の突起
１６の先端に溶接されている。１９は圧電セラミックで
あり、この圧電セラミック１９の中央には孔が形成され
ている。この圧電セラミック１９は上記振動板１８に耐
熱性の絶縁性接着剤にて接着されている。Description of Embodiment 5-7 An embodiment of the present invention will be described below. In FIGS. 3 to 5, reference numeral 12 denotes a housing having an open end, and the outer peripheral surface of this housing 12 has six faces like a bolt. 13
is a threaded portion integrally formed in the lower part of the housing 12, and this threaded portion 13 is screwed into a screw hole of the engine. I4 is a conductive substrate, and one end of this substrate 14 has a plurality of convex portions 15 formed therein, and the other end of the hollow substrate 14 has a truncated conical protrusion 16 formed in the center thereof. Reference numeral 17 denotes a hole formed to penetrate the substrate 14 and the protrusion 16. 1
Reference numeral 8 denotes a metallic diaphragm made of iron-nickel alloy containing 45% nickel as a main component, and a hole is formed in the center of this diaphragm 18. This diaphragm 18 is welded to the tip of the protrusion 16 of the substrate 14. 19 is a piezoelectric ceramic, and a hole is formed in the center of this piezoelectric ceramic 19. This piezoelectric ceramic 19 is bonded to the diaphragm 18 using a heat-resistant insulating adhesive.
２０は絶縁体からなるコネクタユニットであり、このコ
ネクタユニット２０は円筒部２１と基板部６ベーン
２２とからなり、基板部２２の下面には、上記基板１４
の凸部１５が嵌合する凹部２３が形成されている。２４
はコネクタユニット２０内に固定されたターミナルであ
り、このターミナル２４の一端より下方に延びだリード
部２５は基板１４．振動板１８．圧電セラミック１９の
孔を貫通している。２６は基板１４．振動板１８．圧電
セラミック１９の孔に充填された絶縁材である。２７は
金属箔であり、この金属箔２７の中央を貫通したリード
部２５とこの金属箔２７とは半田付けされる。Reference numeral 20 denotes a connector unit made of an insulator, and this connector unit 20 consists of a cylindrical portion 21, a substrate portion 6, and a vane 22.
A recess 23 into which the protrusion 15 fits is formed. 24
is a terminal fixed within the connector unit 20, and a lead portion 25 extending downward from one end of the terminal 24 is connected to the board 14. Vibration plate 18. It passes through a hole in the piezoelectric ceramic 19. 26 is the substrate 14. Vibration plate 18. This is an insulating material filled in the holes of the piezoelectric ceramic 19. 27 is a metal foil, and the lead portion 25 passing through the center of this metal foil 27 and this metal foil 27 are soldered.
また、金属箔２７の外周部は圧電セラミック１９に形成
された銀電極に半田付けされる。２８は０リング、２９
は環状の規制板である。Further, the outer peripheral portion of the metal foil 27 is soldered to a silver electrode formed on the piezoelectric ceramic 19. 28 is 0 ring, 29
is an annular regulation plate.
次に、本実施例の組立て順序について説明する。Next, the assembly order of this embodiment will be explained.
まず、振動板１８を基板１４の突起１６に溶接する。次
に圧電セラミック１９を振動板１８に接着する。次にコ
ネクタユニット２０の下面より突出しているリード部２
５を基板１４等の孔に挿入するとともに、凸部１５を凹
部２３に嵌合する。次に基板１４等の孔内に絶縁材２６
を充填する。次７ ・・
に金属箔２７をリード部２５と圧電セラミック１９の銀
電極に半田付けする。このようにコネクタユニット２０
と基板１４等この一体物を筐体１２の開口部に挿入し、
基板１４を筐体１２の段部１２ａに溶接する。次にＱ
ＩＪンク２８．規制板２９を挿入した後、筐体１２の開
口端部を内側に曲げて完成する。First, the diaphragm 18 is welded to the protrusion 16 of the substrate 14. Next, the piezoelectric ceramic 19 is bonded to the diaphragm 18. Next, the lead portion 2 protruding from the bottom surface of the connector unit 20
5 is inserted into the hole of the substrate 14 etc., and the convex part 15 is fitted into the concave part 23. Next, insert the insulating material 26 into the hole of the substrate 14, etc.
Fill it. Next, the metal foil 27 is soldered to the lead portion 25 and the silver electrode of the piezoelectric ceramic 19. In this way, the connector unit 20
Insert this integrated object such as the board 14 into the opening of the housing 12,
The board 14 is welded to the stepped portion 12a of the housing 12. Next Q
IJink28. After inserting the regulating plate 29, the opening end of the housing 12 is bent inward to complete the process.
上記ノックセンザの筐体１２のネジ部１３はエンジンの
ネジ穴に螺合され、またコネクタユニット２０には、他
のコネクタが嵌合される。The threaded portion 13 of the housing 12 of the knock sensor is screwed into a screw hole of the engine, and another connector is fitted into the connector unit 20.
上記実施例において、エンジンの振動は筐体１２を介し
て基板１４に伝わり、振動板１８と圧電セラミック１９
とがたわみ、この結果圧電セラミック１９に電圧が発生
する。圧電セラミック１９の一方の銀電極は振動板１８
．基板１４を介して筐体１２に接続され、また圧電セラ
ミック１９の他方の銀電極に、金属箔２７．リード部２
５を介してターミナル２４に接続されているだめ、圧電
セラミック１９で発生した電圧は筐体１２とターミナル
２４この間より取り出すことができる。In the above embodiment, engine vibrations are transmitted to the substrate 14 via the housing 12, and the vibration plate 18 and the piezoelectric ceramic 19
deflects, and as a result, a voltage is generated across the piezoelectric ceramic 19. One silver electrode of the piezoelectric ceramic 19 is connected to the diaphragm 18
．． A metal foil 27. is connected to the housing 12 via the substrate 14 and is also connected to the other silver electrode of the piezoelectric ceramic 19. Lead part 2
5 to the terminal 24, the voltage generated in the piezoelectric ceramic 19 can be extracted from between the housing 12 and the terminal 24.
なお、金属箔２７を用いているのは、温度変化に」：っ
てリード部２５が変位しても、このリード部２５と圧電
セラミック１９の銀電極この接続を保つためである。The reason why the metal foil 27 is used is to maintain this connection between the lead portion 25 and the silver electrode of the piezoelectric ceramic 19 even if the lead portion 25 is displaced due to temperature changes.
第６図は１−記ノックセンサの周波数特性を示１゜でお
り、８ＫＨｚ付近に共振周波数を有する。エンジンがノ
ッキングを生じた際に発生する特有の振動は５〜］ Ｏ
ＫＩ−Ｔｚ範囲にあり、本実施例のノックセンザではこ
のノッキングを検出するために、第６図に示す周波数特
性の共振部を利用することになる。なお、負荷抵抗によ
って特性が変化するが荷抵抗を使用した特性、（ト））
は１ＭΩの負荷抵抗を使用した特性を示している。FIG. 6 shows the frequency characteristic of the knock sensor described in 1-1, which is 1° and has a resonant frequency around 8 KHz. The characteristic vibration that occurs when the engine knocks is 5~] O
In order to detect this knocking, the knock sensor of this embodiment uses a resonant section having a frequency characteristic shown in FIG. 6. Although the characteristics change depending on the load resistance, the characteristics using the load resistance (g))
shows the characteristics using a load resistance of 1MΩ.
発明の効果
本発明は上記のような構成であり、本発明によれば以下
に示す効果が得られる。Effects of the Invention The present invention has the above configuration, and according to the present invention, the following effects can be obtained.
（ａ） 金属振動板を基板に溶接にて固定し、かつ、
９八−７
金属箔をリード部と圧電セラミックの銀電極に半田付け
にて固定しているため、信頼性上の変動が小さく、耐久
性に優れ、かつ、製造上圧電セラミックの破壊がなく歩
留に優れる。(a) A metal diaphragm is fixed to a substrate by welding, and
98-7 Metal foil is fixed to the lead part and the silver electrode of the piezoelectric ceramic by soldering, so there is little variation in reliability, excellent durability, and there is no destruction of the piezoelectric ceramic during manufacturing. Excellent in retention.
（１））金属振動板を４５％ニッケル主成分の鉄−二ソ
ケル合金とし、かつ、圧電セラミックと金属振動板とを
耐熱性の絶縁性接着剤で貼合わせているため、温度に対
する特性変動、耐久後変動が小さく安定している。(1)) The metal diaphragm is made of an iron-disokel alloy with a main component of 45% nickel, and the piezoelectric ceramic and metal diaphragm are bonded together with a heat-resistant insulating adhesive, so characteristics fluctuation due to temperature, It is stable with little fluctuation after durability.
第１図は従来のノック七ンザの側断面図、第２図は第１
図のＡ部分の拡大図、第３図は本発明の一実施例におけ
るノックセンサの上面図、第４図は同側面図、第５図は
同側断面図、第６図は同ノックセンサの周波数特性図で
ある。
１２・・・筐体、１２ａ・・・段部、１３・・・ネジ部
、１４・・・基板、１５・・・凸部、１６・・・突起、
１７・孔、１８・・撮動板、１９・・・圧電セラミック
、２０・・コネクタユニット、２１・・・円筒部、２２
・・基板部、２３・・・凹部、２４・・ターミナル、２
５・・リード部、１０ベー７
２６・・・絶縁材、２７・・金属箔、２８・・・０リン
グ、２９・・・規制板。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
第４図
憾Figure 1 is a side sectional view of a conventional knocking lever, and Figure 2 is a cross-sectional view of a conventional knocking lever.
3 is a top view of a knock sensor according to an embodiment of the present invention, FIG. 4 is a side view of the same, FIG. 5 is a sectional view of the same side, and FIG. It is a frequency characteristic diagram. DESCRIPTION OF SYMBOLS 12... Housing, 12a... Step part, 13... Screw part, 14... Board, 15... Convex part, 16... Protrusion,
17. Hole, 18. Imaging plate, 19. Piezoelectric ceramic, 20. Connector unit, 21. Cylindrical portion, 22
... Board part, 23 ... Recessed part, 24 ... Terminal, 2
5... Lead portion, 10 base 7 26... Insulating material, 27... Metal foil, 28... 0 ring, 29... Regulating plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Regret
Claims (2)
トが設けられた基板と、中央部が上記突起に溶接された
振動板と、この振動板の一面に耐熱性の絶縁性接着剤で
接着された圧電セラミックと、上記基板，振動板，圧電
セラミックの孔を貫通するリード部を有し、上記コネク
タユニットに保持されたターミナルと、上記リード部と
上記圧電セラミックとを接続する金属箔と、上記基板が
固定される筐体とからなるノックセンサ。(1) A board with protrusions formed on one side and a connector unit on the other side, a diaphragm whose center part is welded to the protrusions, and one side of this diaphragm bonded with heat-resistant insulating adhesive. a terminal having a lead portion penetrating the substrate, the diaphragm, and a hole in the piezoelectric ceramic and held in the connector unit; and a metal foil connecting the lead portion and the piezoelectric ceramic; A knock sensor comprising a casing to which the above board is fixed.
からなる振動板を用いた特許請求の範囲第１項記載のノ
ックセンサ。(2) The knock sensor according to claim 1, which uses a diaphragm made of an iron-nickel alloy containing 45% nickel as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13842984A JPS6117916A (en) | 1984-07-04 | 1984-07-04 | Knock sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13842984A JPS6117916A (en) | 1984-07-04 | 1984-07-04 | Knock sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6117916A true JPS6117916A (en) | 1986-01-25 |
Family
ID=15221759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13842984A Pending JPS6117916A (en) | 1984-07-04 | 1984-07-04 | Knock sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6817226B2 (en) * | 2003-03-18 | 2004-11-16 | Delphi Technologies, Inc. | Sensing assembly and method of making same |
| US9823233B2 (en) | 2013-10-25 | 2017-11-21 | Chad Alan Michaelis | Determining the knock rating of liquid spark-ignition engine fuels |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754819A (en) * | 1980-09-19 | 1982-04-01 | Nippon Soken Inc | Detector for knocking in internal combustion engine |
| JPS58216919A (en) * | 1982-06-11 | 1983-12-16 | Ngk Spark Plug Co Ltd | Piezoelectric resonating type knock sensor for internal combustion engine |
| JPS5937429A (en) * | 1982-08-26 | 1984-02-29 | Matsushita Electric Ind Co Ltd | Knock sensor |
-
1984
- 1984-07-04 JP JP13842984A patent/JPS6117916A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754819A (en) * | 1980-09-19 | 1982-04-01 | Nippon Soken Inc | Detector for knocking in internal combustion engine |
| JPS58216919A (en) * | 1982-06-11 | 1983-12-16 | Ngk Spark Plug Co Ltd | Piezoelectric resonating type knock sensor for internal combustion engine |
| JPS5937429A (en) * | 1982-08-26 | 1984-02-29 | Matsushita Electric Ind Co Ltd | Knock sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6817226B2 (en) * | 2003-03-18 | 2004-11-16 | Delphi Technologies, Inc. | Sensing assembly and method of making same |
| US9823233B2 (en) | 2013-10-25 | 2017-11-21 | Chad Alan Michaelis | Determining the knock rating of liquid spark-ignition engine fuels |
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