JPS5935113A - Knock sensor - Google Patents
Knock sensorInfo
- Publication number
- JPS5935113A JPS5935113A JP14576982A JP14576982A JPS5935113A JP S5935113 A JPS5935113 A JP S5935113A JP 14576982 A JP14576982 A JP 14576982A JP 14576982 A JP14576982 A JP 14576982A JP S5935113 A JPS5935113 A JP S5935113A
- Authority
- JP
- Japan
- Prior art keywords
- knock sensor
- alloy
- content rate
- nickel
- content
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- 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
本発明は自動車等のエンジンの異常振動を検知するノッ
クセンサに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a knock sensor for detecting abnormal vibrations of an engine of an automobile or the like.
従来例の構成とその問題点
第１図は従来のノックセンサの要部を示している。第１
図において、１は基板、２，２′は基板１上に固定され
た支持片、３は支持片２，２′上に振動可能に支持され
た金属振動板、４は金属振動板３上に貼り合せられた圧
電セラミックである。この圧電セラミック４の上面、下
面には焼付等によ２７・ −・
り電極が設けらｎ、でいる。５は基板１の直通孔（図示
せず）内に絶縁材で保持さ几たピンであり、このピン５
の一端は基板１の下面より突出している。６は圧電セラ
ミック４の電極に接続さ、ｔ′ｌ−た金属リード箔であ
り、この金属リード箔６の一端は上記ピン６に接続さ几
ている。第１図に示す基板１等は、エンジンに取付けら
几る筐体内に収納さ几る０
エンジンの振動は筐体、基板１を介して、金属振動板３
．圧電セラミック４に伝わる結果、圧電セラミック４の
電極間にエンジンの振動に応じた電気信号が発生する。Structure of the conventional example and its problems FIG. 1 shows the main parts of a conventional knock sensor. 1st
In the figure, 1 is a substrate, 2 and 2' are supporting pieces fixed on the substrate 1, 3 is a metal diaphragm that is vibrably supported on the support pieces 2 and 2', and 4 is a metal diaphragm that is supported on the metal diaphragm 3. It is a bonded piezoelectric ceramic. 27.-- electrodes are provided on the upper and lower surfaces of the piezoelectric ceramic 4 by baking or the like. 5 is a pin held in a through hole (not shown) of the substrate 1 with an insulating material;
One end protrudes from the bottom surface of the substrate 1. A metal lead foil 6 is connected to the electrode of the piezoelectric ceramic 4, and one end of the metal lead foil 6 is connected to the pin 6. The board 1 shown in FIG.
．． As a result of being transmitted to the piezoelectric ceramic 4, an electric signal corresponding to engine vibration is generated between the electrodes of the piezoelectric ceramic 4.
この電気信号波形を観測することにより、エンジンの異
常振動が検出できる。By observing this electrical signal waveform, abnormal engine vibrations can be detected.
上記従来例においては、金属振動板３としてメッキさｆ
した鉄等が用いら肛ていた。しかしながら鉄からなる金
属振動板３の熱膨張係数は１３×１０ 程度であり、圧
電セラミック４の熱膨張係数（１０Ｘ１０下６）に比較
して太きいために、共振周波数が周囲の温度変化によっ
て大きく変動する欠点があった。In the above conventional example, the metal diaphragm 3 is plated with f.
Iron, etc., were used in the anus. However, the thermal expansion coefficient of the metal diaphragm 3 made of iron is about 13×10 2 , which is larger than that of the piezoelectric ceramic 4 (10×10 lower 6), so the resonance frequency increases due to changes in the surrounding temperature. There was a variable drawback.
３ベーソ
発明の１」的
本発明け、温度が変化しても共振周波数の変動が小さい
ノックセンサを提供することを目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a knock sensor whose resonant frequency is less likely to fluctuate even when the temperature changes.
発明の構成
本発明に、−ト記目的を達成するために、ニッケル（Ｎ
ｉ）と鉄（Ｆｅ ）とを主成分とするＦａ−Ｎｉ合金の
内で、Ｎ１の含有率（ｗｔ％）が４ｏ〜６゜係のＦｅ−
Ｎｉ合金全金属振動板として使用することを特徴とする
ものである。Structure of the Invention In order to achieve the above objects, the present invention uses nickel (N
i) and iron (Fe) as the main components, Fe-
It is characterized by being used as a Ni alloy all-metal diaphragm.
実施例の説明
第２図ばＦｅ −Ｎｉ合金のＮｉ含有率と熱膨張係数と
の関係を示している。第２図からも明らかなように、Ｆ
ｅ −Ｎｉ合金においては、Ｎ１含有率が３０〜４０％
において、熱膨張係数が最少となり、Ｎｉ含有率が大き
くなると熱膨張係数が大きくなる。本発明は、Ｎｉ含有
率が４０〜６０係のＦｅ −Ｎｉ合金を金属振動板４と
して使用するものである。本発明者らの実験によ几ば、
Ｆｅ −Ｎｉ合金のＮ１含有率が６０％’（ｚ越すと、
共振周波数の温度特性が劣化するとともに溶接しにくく
なり、捷たＮ１含有率が４０係より小さくなると、錆び
易いものである。才たＮ１含有率が４０〜６０％のＦｅ
−Ｎｉ合金は、振動減衰係数が太きいため、ノックセ
ンサの共振のＱが小さく感度が良好となるものである。DESCRIPTION OF THE EMBODIMENTS FIG. 2 shows the relationship between the Ni content and the thermal expansion coefficient of the Fe--Ni alloy. As is clear from Figure 2, F
In the e-Ni alloy, the N1 content is 30-40%
, the thermal expansion coefficient is the minimum, and as the Ni content increases, the thermal expansion coefficient increases. In the present invention, a Fe--Ni alloy with a Ni content of 40 to 60 is used as the metal diaphragm 4. According to the experiments of the present inventors,
When the N1 content of the Fe-Ni alloy exceeds 60%' (z
As the temperature characteristics of the resonant frequency deteriorate, it becomes difficult to weld, and when the N1 content of the sludge is less than 40, it is likely to rust. Fe with an N1 content of 40 to 60%
-Ni alloy has a large vibration damping coefficient, so the resonance Q of the knock sensor is small and the sensitivity is good.
なお、Ｎ１含有率が４０〜６０％ＣＱ Ｆｅ −Ｎｉ合
金とシテは、ＰＢ（Ｎｉ含有率４５％）、Ｎ−５０（Ｎ
ｉ含有率５０） 、Ｎ −５２（Ｎｉ含有率５２多）等
がある。なお、Ｎ１含有率が７８係のＰＣは熱膨張係数
が太きく共振周波数の温度特性が劣化するものである。In addition, CQ Fe-Ni alloy with N1 content of 40 to 60% and shite are PB (Ni content of 45%), N-50 (N
Ni content: 50), N-52 (Ni content: 52%), etc. Note that PC with an N1 content of 78 coefficients has a large coefficient of thermal expansion and deteriorates the temperature characteristics of the resonance frequency.
発明の効果
本発明は」二記のような構成であり、本発明によ几ば、
温度変化による共振周波数の変動を小さくすることがで
き、温度変化に対して安定したノックセンサが得ら几る
利点を有するものである。Effects of the Invention The present invention has the structure as described in Section 2, and according to the present invention,
This has the advantage that fluctuations in resonance frequency due to temperature changes can be reduced, and a knock sensor that is stable against temperature changes can be obtained.
第１図は従来のノックセンサの要部の斜視図、第２図は
Ｆａ−Ｎｉ合金のＮ１含有率に対する熱膨張係数の関係
を示す図である。
６ベージ
ト・・・・・基板、２，２′・・・・・・支持片、３・
・・・・・金属振動板、４・・・・・・圧電セラミック
、５・・・・・・ピン、６・・・・・・金属リード箔。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
Ｎｆ 壱・有量 （−躯）FIG. 1 is a perspective view of the main parts of a conventional knock sensor, and FIG. 2 is a diagram showing the relationship between the coefficient of thermal expansion and the N1 content of an Fa-Ni alloy. 6Baget...Substrate, 2,2'...Support piece, 3.
...Metal diaphragm, 4...Piezoelectric ceramic, 5...Pin, 6...Metal lead foil. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Nf 1/Amount (-body)
Claims (1)
６０擾の鉄ニツケル合金からなる金属振動板を振動可能
に支持するとともに、上記金属振動板に圧電セラミック
を貼り合わせてなるノックセンサ。The main ingredients are iron and nickel, and the nickel content is 40~
A knock sensor that supports a metal diaphragm made of a 60 mm iron-nickel alloy so that it can vibrate, and also has a piezoelectric ceramic bonded to the metal diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14576982A JPS5935113A (en) | 1982-08-23 | 1982-08-23 | Knock sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14576982A JPS5935113A (en) | 1982-08-23 | 1982-08-23 | Knock sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5935113A true JPS5935113A (en) | 1984-02-25 |
Family
ID=15392732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14576982A Pending JPS5935113A (en) | 1982-08-23 | 1982-08-23 | Knock sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5935113A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230710A (en) * | 1986-03-31 | 1987-10-09 | Nitto Electric Ind Co Ltd | Hair tonic composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772020A (en) * | 1980-10-23 | 1982-05-06 | Japan Electronic Control Syst Co Ltd | Vibration detector |
-
1982
- 1982-08-23 JP JP14576982A patent/JPS5935113A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5772020A (en) * | 1980-10-23 | 1982-05-06 | Japan Electronic Control Syst Co Ltd | Vibration detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230710A (en) * | 1986-03-31 | 1987-10-09 | Nitto Electric Ind Co Ltd | Hair tonic composition |
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