JPS6259837U - - Google Patents
Info
- Publication number
- JPS6259837U JPS6259837U JP15081285U JP15081285U JPS6259837U JP S6259837 U JPS6259837 U JP S6259837U JP 15081285 U JP15081285 U JP 15081285U JP 15081285 U JP15081285 U JP 15081285U JP S6259837 U JPS6259837 U JP S6259837U
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- thermal expansion
- pressure sensor
- cylinder pressure
- preload
- 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
- 230000036316 preload Effects 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 claims 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
第１図は本考案の圧力センサの断面図、第２図
は圧電素子のヒステリシスを例示するグラフ、第
３図は従来の圧力センサの断面図、第４図はスリ
ーブの初期引張応力と圧電素子の予荷重との関係
を示すグラフである。
１０……圧力センサ、１２……外筒、１６……
プリロードケース、１８……インナケース、２０
……プリロードスリーブ、２２……熱膨張補償部
材、２４……圧電素子、３６……ダイヤフラム。
Fig. 1 is a cross-sectional view of the pressure sensor of the present invention, Fig. 2 is a graph illustrating the hysteresis of the piezoelectric element, Fig. 3 is a cross-sectional view of a conventional pressure sensor, and Fig. 4 is the initial tensile stress of the sleeve and the piezoelectric element. It is a graph showing the relationship between the preload and the preload. 10...Pressure sensor, 12...Outer cylinder, 16...
Preload case, 18... Inner case, 20
... Preload sleeve, 22 ... Thermal expansion compensation member, 24 ... Piezoelectric element, 36 ... Diaphragm.
Claims (1)
ードケース内に軸方向プリロード状態で収容して
成る内燃機関用筒内圧力センサにおいて、 前記プリロードケースの一端壁と圧電素子との
間には、プリロードケースの熱膨張率より大きな
熱膨張率を有する熱膨張補償部材を圧電素子に対
し軸方向整列関係で配置したことを特徴とする筒
内圧力センサ。 ２ 前記プリロードケースはステンレス鋼から成
り、前記熱膨張補償部材はアルミニウムを含んで
成る実用新案登録請求の範囲第１項記載の筒内圧
力センサ。[Claims for Utility Model Registration] 1. A cylinder pressure sensor for an internal combustion engine comprising a transducer made of a columnar piezoelectric element housed in a hollow preload case in an axially preloaded state, comprising: one end wall of the preload case and the piezoelectric element. An in-cylinder pressure sensor characterized in that a thermal expansion compensating member having a coefficient of thermal expansion larger than the coefficient of thermal expansion of the preload case is disposed between the piezoelectric element and the piezoelectric element in an axially aligned relationship. 2. The in-cylinder pressure sensor according to claim 1, wherein the preload case is made of stainless steel, and the thermal expansion compensating member is made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15081285U JPS6259837U (en) | 1985-10-03 | 1985-10-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15081285U JPS6259837U (en) | 1985-10-03 | 1985-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6259837U true JPS6259837U (en) | 1987-04-14 |
Family
ID=31067290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15081285U Pending JPS6259837U (en) | 1985-10-03 | 1985-10-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6259837U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007286060A (en) * | 2006-04-13 | 2007-11-01 | Piezocryst Advanced Sensorics Gmbh | Piezoelectric pressure sensor |
| JP2010271321A (en) * | 2009-05-25 | 2010-12-02 | Robert Bosch Gmbh | Device for detecting combustion chamber pressure of internal combustion engine |
| JP2012527632A (en) * | 2009-05-25 | 2012-11-08 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Device for detecting the combustion chamber pressure of an internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839753A (en) * | 1971-09-16 | 1973-06-11 |
-
1985
- 1985-10-03 JP JP15081285U patent/JPS6259837U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839753A (en) * | 1971-09-16 | 1973-06-11 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007286060A (en) * | 2006-04-13 | 2007-11-01 | Piezocryst Advanced Sensorics Gmbh | Piezoelectric pressure sensor |
| JP2010271321A (en) * | 2009-05-25 | 2010-12-02 | Robert Bosch Gmbh | Device for detecting combustion chamber pressure of internal combustion engine |
| JP2012527632A (en) * | 2009-05-25 | 2012-11-08 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Device for detecting the combustion chamber pressure of an internal combustion engine |