JPH0539476Y2 - - Google Patents
Info
- Publication number
- JPH0539476Y2 JPH0539476Y2 JP1986175982U JP17598286U JPH0539476Y2 JP H0539476 Y2 JPH0539476 Y2 JP H0539476Y2 JP 1986175982 U JP1986175982 U JP 1986175982U JP 17598286 U JP17598286 U JP 17598286U JP H0539476 Y2 JPH0539476 Y2 JP H0539476Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- inner cylinder
- mounting bracket
- cylinder
- piezoelectric element
- 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 - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 230000036316 preload Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
【考案の詳細な説明】
＜産業上の利用分野＞
本考案は、内燃機関のシリンダー内圧の変化を
検知する圧力センサーに関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a pressure sensor that detects changes in cylinder internal pressure of an internal combustion engine.
＜従来の技術＞
シリンダー内の、燃料噴射、燃焼、ノツキング
等に伴う圧力変化を、圧電素子板の圧縮歪に伴つ
て生ずる信号出力により検出するセンサーは、
種々提案されている。<Prior art> A sensor that detects pressure changes in a cylinder due to fuel injection, combustion, knocking, etc., by outputting a signal caused by compressive strain of a piezoelectric element plate is as follows:
Various proposals have been made.
第２図は、この種の圧力センサーの一例を示す
ものである。 FIG. 2 shows an example of this type of pressure sensor.
図中１は、その細径周面にシリンダーブロツク
に螺合する螺子部２が形成された筒状の取付金具
であつて、その中心には、長手方向に沿つて装着
孔３が形成されている。前記装着孔３の中央部に
は細径の導通孔４が、その前部には検出孔５が、
さらにその後部には大径孔６が夫々形成されてい
る。前記検出孔５内には、その奥段面５ａ側に、
環状の絶縁板７、導電体８、電極を上下主表面に
形成されたPZT等の材料による板状圧電素子板
９等が順次積層状に配設され、その周囲を絶縁材
１１で覆つて取付金具１と絶縁している。 In the figure, reference numeral 1 denotes a cylindrical mounting bracket having a threaded portion 2 formed on its narrow diameter circumferential surface to be screwed into the cylinder block, and a mounting hole 3 formed in the center along the longitudinal direction. There is. A small diameter conduction hole 4 is provided in the center of the mounting hole 3, and a detection hole 5 is provided in the front portion thereof.
Furthermore, large-diameter holes 6 are formed in the rear portions thereof. Inside the detection hole 5, on the inner surface 5a side,
A ring-shaped insulating plate 7, a conductor 8, a plate-shaped piezoelectric element plate 9 made of a material such as PZT with electrodes formed on the upper and lower main surfaces are sequentially arranged in a laminated manner, and the periphery is covered with an insulating material 11 for installation. It is insulated from metal fitting 1.
さらに、前記検出孔５には圧力伝達杆１２が挿
通され、その検知端をダイヤフラム１３に接合し
て覆い、その後端を前記圧電素子板９側に圧接し
て封入されている。前記ダイヤフラム１３は、雄
螺子１４を螺進して予圧をかけながらアルゴン溶
接等の手段で前記圧力伝達杆１２の下端と接合す
る。そして前記圧電素子板９の上面電極は、導電
体８に半田付けされたリード線ｘにより導通孔４
から、大径孔６側に電気的に引出されており、さ
らにケーブルｙにより外部に取出される。 Furthermore, a pressure transmission rod 12 is inserted through the detection hole 5, its sensing end is joined to and covered by a diaphragm 13, and its rear end is pressed against and sealed against the piezoelectric element plate 9 side. The diaphragm 13 is joined to the lower end of the pressure transmission rod 12 by means of argon welding or the like while applying a preload by threading the male screw 14. The upper surface electrode of the piezoelectric element plate 9 is connected to the conductive hole 4 by a lead wire x soldered to the conductor 8.
From there, it is electrically led out to the large diameter hole 6 side, and further taken out to the outside by a cable y.
前記構成からなる圧力センサーは、螺子部２を
シリンダーブロツクに装着して、取付金具１先端
を該シリンダー内に露出して装着される。この装
着状態で、シリンダー内に圧力変動が生ずると、
前記圧力伝達杆１２の先端にダイヤフラム１３を
介して圧力が作用する。このため、該圧力により
圧電素子板９が、奥段面５ａ側へ圧縮され、その
圧縮歪により電荷を発生する。かかる電荷は電圧
として前記ケーブルｙにより外部へ取出される。 The pressure sensor constructed as described above is mounted with the screw portion 2 mounted on the cylinder block and the tip of the mounting fitting 1 exposed inside the cylinder. If pressure fluctuation occurs in the cylinder with this installed condition,
Pressure acts on the tip of the pressure transmission rod 12 via the diaphragm 13. Therefore, the pressure causes the piezoelectric element plate 9 to be compressed toward the inner surface 5a, and the compressive strain generates an electric charge. This electric charge is extracted as a voltage to the outside through the cable y.
＜考案が解決しようとする問題点＞
ところで、前記構成にあつて、取付金具１はエ
ンジンブロツクに固定する際に塑性変形を生じ、
このため、圧電素子板９等の各検出部材間の接合
圧が緩み、出力特性が変化する欠点があつた。ま
たこの現象は、圧電素子板９等の各検出部材と、
金具１との相対的寸法変化によつても生ずるか
ら、熱膨張、熱収縮によつても起る。<Problems to be solved by the invention> By the way, in the above configuration, the mounting bracket 1 undergoes plastic deformation when it is fixed to the engine block.
For this reason, the bonding pressure between each detection member such as the piezoelectric element plate 9 is loosened, resulting in a drawback that the output characteristics change. This phenomenon also occurs when each detection member such as the piezoelectric element plate 9,
It occurs due to a relative dimensional change with the metal fitting 1, so it also occurs due to thermal expansion and thermal contraction.
本考案は、前記従来欠点の除去を目的とするも
のである。 The present invention aims to eliminate the above-mentioned conventional drawbacks.
＜問題点を解決するための手段＞
本考案は、内燃機関のシリンダーブロツクに装
着される取付金具内に貫通孔を形成し、該貫通孔
内に圧電素子板、圧力伝達杆等の検出部材を収納
した内筒を配設して取付金具側に部分固定し、さ
らに該内筒のシリンダー側端から突出する圧力伝
達杆の検知端を、取付金具の貫通孔端部を覆う金
属製ダイアフラムと連結するとともに、前記貫通
孔の内面と、内筒周囲間に軟質充填層を介装した
ことを特徴とするものである。<Means for solving the problem> The present invention is characterized in that a through hole is formed in a mounting bracket which is attached to the cylinder block of an internal combustion engine, an inner tube containing detection members such as a piezoelectric element plate and a pressure transmission rod is disposed in the through hole and partially fixed to the mounting bracket, and further, the detection end of the pressure transmission rod which protrudes from the cylinder side end of the inner tube is connected to a metal diaphragm which covers the end of the through hole in the mounting bracket, and a soft filling layer is interposed between the inner surface of the through hole and the periphery of the inner tube.
＜作用＞
各検出部材を収容する内筒は、取付金具に部分
固定され、軟質充填層を介して貫通孔内に収納さ
れている。このため取付金具に縦方向の寸法変化
を生じても、軟質充填層がその形状変化を吸収
し、内筒に対する影響が可及的に除去される。こ
のため、内筒の容積に影響を与えないから、該内
筒内の各検出部材間で緩みを生ずることがない。<Function> The inner cylinder housing each detection member is partially fixed to the mounting bracket and housed in the through hole via the soft filling layer. Therefore, even if the mounting bracket undergoes a change in dimension in the vertical direction, the soft filling layer absorbs the change in shape, and the influence on the inner cylinder is eliminated as much as possible. Therefore, since the volume of the inner cylinder is not affected, there is no possibility of loosening between the detection members in the inner cylinder.
また、内筒が貫通孔内で取付金具と分離して固
定されているため、該内筒での熱滞留が問題とな
り得るが、軟質充填層を伝播して、取付金具側へ
熱が放散されるから、内筒に蓄熱されることはな
い。 Additionally, since the inner cylinder is fixed separately from the mounting bracket in the through hole, heat retention in the inner cylinder can be a problem, but heat is dissipated to the mounting bracket by propagating through the soft packed layer. Therefore, heat is not stored in the inner cylinder.
＜実施例＞ 第１図は、本考案の一実施例を示す。<Example> FIG. 1 shows an embodiment of the present invention.
その細径周面にシリンダーブロツクに螺合する
螺子部２１が形成された筒状の取付金具２０の中
心には、長手方向に沿つて、その先端にまで開口
する貫通孔２２が形成されている。前記貫通孔２
２には、下端が開口し、上端にはリード線ｘの挿
入孔２４が形成された内筒２３が嵌装されている
前記内筒２３の外径は、貫通孔２２の内径よりも
少し小さくして、内筒２３の外周と貫通孔２２の
内壁間に周囲間隙を生ずるようにしている。また
内筒２３の下部内周面には雌螺子２５が形成され
ている。 A through hole 22 is formed in the center of the cylindrical mounting bracket 20, which has a threaded portion 21 formed on its narrow diameter circumferential surface to be screwed into the cylinder block, and extends along the longitudinal direction to its tip. . The through hole 2
2 is fitted with an inner cylinder 23 which is open at the lower end and has an insertion hole 24 for the lead wire x at the upper end.The outer diameter of the inner cylinder 23 is slightly smaller than the inner diameter of the through hole 22. Thus, a peripheral gap is created between the outer periphery of the inner cylinder 23 and the inner wall of the through hole 22. Further, a female thread 25 is formed on the lower inner peripheral surface of the inner cylinder 23.
前記内筒２３の下部周面には取付鍔２６が形成
されており、該取付鍔２６を取付金具２０の下端
に溶着することにより、該取付金具２０に対して
内筒２３を部分固定するようにしている。 A mounting collar 26 is formed on the lower peripheral surface of the inner cylinder 23, and by welding the mounting collar 26 to the lower end of the mounting bracket 20, the inner cylinder 23 is partially fixed to the mounting bracket 20. I have to.
また前記内筒２３の周部と、貫通孔２２の内壁
間の周囲間隙には、銅蝋、銀蝋等の比較的軟質の
金属蝋を蝋付するか、またはニツケルパウダー等
を圧縮して詰めたり焼結させて、軟質充填層ｆが
形成される。前記軟質充填層ｆとして、シリコン
ゴム等を貫通孔２４に封入するようにしてもよ
い。 Also, the peripheral gap between the circumference of the inner cylinder 23 and the inner wall of the through hole 22 is filled with relatively soft metal wax such as copper wax or silver wax, or compressed with nickel powder, etc. The soft packed layer f is formed by sintering. As the soft filling layer f, silicone rubber or the like may be sealed in the through hole 24.
さらにまた前記内筒２３の内部には、奥断面２
３ａ側に、絶縁体２７、パツキン２８、スペーサ
２９、環状の導電筒片３０、端子板３１、電極を
上下主表面に形成されたPZT等の材料による板
状圧電素子板３２及び端子板３３が順次積層状に
配設され、その周囲を絶縁材３４で覆つて内筒２
３と絶縁している。また端子板３１の上面から
は、リード線ｘが接続される接続用舌片３１ａが
突設し、前記導電筒片３０の孔部に挿通してい
る。そして前記圧電素子板３２の上面電極は、端
子板３１の接続用舌片３１ａに接続されたリード
線ｘを介してケーブルｙに電気的に接続してい
る。 Furthermore, inside the inner cylinder 23, there is a back section 2.
On the 3a side, there are an insulator 27, a packing 28, a spacer 29, an annular conductive cylinder piece 30, a terminal plate 31, a plate-shaped piezoelectric element plate 32 made of a material such as PZT with electrodes formed on the upper and lower main surfaces, and a terminal plate 33. The inner cylinder 2 is arranged in a layered manner and covered with an insulating material 34.
3 and is insulated. Further, a connecting tongue piece 31 a to which a lead wire x is connected projects from the upper surface of the terminal plate 31 and is inserted into the hole of the conductive cylinder piece 30 . The top electrode of the piezoelectric element plate 32 is electrically connected to the cable y via a lead wire x connected to the connecting tongue 31a of the terminal plate 31.
さらには絶縁体２７、パツキン２８、スペーサ
２９には接続用舌片３１ａ及び挿入孔２４と上下
で一致してリード線ｘを通入可能とする透孔が形
成されている。 Further, through holes are formed in the insulator 27, the packing 28, and the spacer 29 so as to be vertically aligned with the connecting tongue piece 31a and the insertion hole 24, and to allow the lead wire x to pass therethrough.
前記内筒２３の内部には、さらに圧力伝達杆３
６が挿通されてその後端を端子板３３の下面に当
接している。前記圧力伝達杆３６は中央から先端
を径小とし、その頂部と径小部間の段部に当接顎
面３７を形成している。 A pressure transmission rod 3 is further provided inside the inner cylinder 23.
6 is inserted, and its rear end is in contact with the lower surface of the terminal plate 33. The pressure transmitting rod 36 has a diameter reduced from the center to the tip, and an abutment jaw surface 37 is formed at the stepped portion between the top and the reduced diameter portion.
さらにまた、内筒２３には、圧力伝達杆３６の
径小部の周囲位置で、筒状螺子３８が雌螺子２５
に沿つて螺入される。そしてその緊締状態で、筒
状螺子３８の上端の係止面３８ａは、環状パツキ
ンを介して、前記圧力伝達杆３６の当接顎面３７
側に圧接する。そしてこの筒状螺子３８の螺子込
みにより圧電素子板３２に所要の予圧力が付与さ
れる。 Furthermore, in the inner cylinder 23, a cylindrical screw 38 is connected to the female screw 25 at a position around the small diameter portion of the pressure transmission rod 36.
It is screwed in along the In the tightened state, the locking surface 38a at the upper end of the cylindrical screw 38 is connected to the abutting jaw surface 37 of the pressure transmitting rod 36 via the annular packing.
Press against the side. By screwing in the cylindrical screw 38, a required preload force is applied to the piezoelectric element plate 32.
この予圧印加は、各検出部材の体積変化を吸収
し、内筒２３の内部に緊密に封入されるようにす
るとともに、前記圧電素子板３２にバイアスを掛
けるためになされる。而て、内筒２３の内部の各
検出部材は、予圧により奥段面２３ａ側に押付け
られることとなる。 This preload is applied to absorb the volume change of each detection member so that it is tightly sealed inside the inner cylinder 23, and to apply a bias to the piezoelectric element plate 32. Therefore, each detection member inside the inner cylinder 23 is pressed toward the inner surface 23a side due to the preload.
前記筒状螺子３８は、その上部内径を圧力伝達
杆３６の径小部の外径と略等しくしており、この
装着状態で、該圧力伝達杆３６は密嵌状に挿通し
その検知端は内筒２３の内部よりもさらに下方突
出する。そして、該検知端にはダイヤフラム４０
を外嵌し、さらにその周部の立上がり側壁４２を
取付金具２０下端に外嵌して、各必要接合箇所を
アルゴン溶接により固着される。而て、圧力伝達
杆３６の検知端にはダイヤフラム４０が連結され
る。 The upper inner diameter of the cylindrical screw 38 is approximately equal to the outer diameter of the small diameter portion of the pressure transmitting rod 36, and in this installed state, the pressure transmitting rod 36 is inserted in a tight fit and its sensing end is It protrudes further downward than the inside of the inner cylinder 23. A diaphragm 40 is installed at the detection end.
The rising side wall 42 of the periphery thereof is further fitted onto the lower end of the mounting bracket 20, and each required joint location is fixed by argon welding. A diaphragm 40 is connected to the sensing end of the pressure transmission rod 36.
前記構成からなる圧力センサーは、取付金具２
０の螺子部２１をシリンダーブロツクに装着し
て、取付金具２０先端を該シリンダー内に露出し
て装着される。かかる装着状態で、シリンダー内
に圧力変動が生ずると、前記圧力伝達杆３６の検
知端に圧力が作用する。このため、該圧力により
圧電素子板３２が、奥段面２３ａ側へ圧縮され、
その圧縮歪により電荷を発生する。この電荷は電
圧としてケーブルｙにより外部へ取出される。 The pressure sensor having the above configuration has a mounting bracket 2.
The screw portion 21 of 0 is attached to the cylinder block, and the mounting bracket 20 is mounted with the tip thereof exposed inside the cylinder. In this installed state, when pressure fluctuation occurs within the cylinder, pressure acts on the sensing end of the pressure transmission rod 36. Therefore, the pressure compresses the piezoelectric element plate 32 toward the inner surface 23a,
The compressive strain generates an electric charge. This charge is taken out as a voltage to the outside via cable y.
前記構成にあつて、内燃機関のシリンダーブロ
ツクに螺子部２１を螺合する際の応力により取付
金具２０に伸張を生じたり、または温度変化等の
影響により取付け後に熱膨張して、取付金具２０
に寸法変化を生じることがあるが、内筒２３は取
付鍔２６により部分固定されて軟質充填層ｆを介
して貫通孔２２内に収容されている。このため、
取付金具２０が伸張しても、軟質充填層ｆの軟質
性により内筒２３は取付金具２０に対して該伸張
方向では拘束力が弱く、追従して変形することは
ない。従つて、該内筒２３の容積に変化を生じ
ず、端子板３１、圧電素子板３２、端子板３３、
圧力伝達杆３６等の検出部材間での緩みが発生し
ないから、圧電素子板３２への予圧力に変化を生
じない。 In the above structure, the mounting bracket 20 may stretch due to stress when screwing the screw portion 21 into the cylinder block of an internal combustion engine, or thermally expand after installation due to the influence of temperature changes, etc.
Although dimensional changes may occur, the inner cylinder 23 is partially fixed by the mounting collar 26 and accommodated in the through hole 22 via the soft filling layer f. For this reason,
Even if the mounting bracket 20 is expanded, the inner cylinder 23 has a weak restraining force on the mounting bracket 20 in the direction of extension due to the softness of the soft filling layer f, and will not follow the expansion and deform. Therefore, there is no change in the volume of the inner cylinder 23, and the terminal plate 31, piezoelectric element plate 32, terminal plate 33,
Since loosening does not occur between the detection members such as the pressure transmission rod 36, the preload force applied to the piezoelectric element plate 32 does not change.
また、例えば内筒２３が、貫通孔２２内で、該
孔と空隙を介して保持されていると、内筒２３内
に蓄積された熱が、外部に放散し難い。しかし、
前記軟質充填層ｆが介装されていることにより放
熱が円滑になされ、内筒２３での蓄熱が解消され
る。そしてこのため内筒２３の熱膨張または、収
縮が可及的に防止される。 Further, for example, if the inner cylinder 23 is held within the through hole 22 through a gap with the hole, the heat accumulated within the inner cylinder 23 is difficult to dissipate to the outside. but,
By interposing the soft packed layer f, heat radiation is performed smoothly, and heat accumulation in the inner cylinder 23 is eliminated. Therefore, thermal expansion or contraction of the inner cylinder 23 is prevented as much as possible.
＜考案の効果＞
本考案は、上述したように、各検出部材を収容
する内筒を、取付金具に部分固定し、かつ軟質充
填層ｆを介して貫通孔の内壁と連接して収容した
から、取付金具に寸法変化を生じても、軟質充填
層ｆがその変化を吸収して、前記内筒の容積に影
響を与えず、該内筒内の各検出部材間で緩みを生
じない。また内筒が加熱されても軟質充填層ｆを
介して熱が外部に放散され易く、該内筒の蓄熱が
なく、熱膨張または、収縮が可及的に抑止され
る。このため、圧電素子から発生する出力信号の
特性が安定し、シリンダ内の圧力変化等を正確に
検知し得る等の優れた効果がある。<Effects of the invention> As described above, the present invention has the inner cylinder housing each detection member partially fixed to the mounting bracket and connected to the inner wall of the through hole via the soft filling layer f. Even if a dimensional change occurs in the mounting bracket, the soft filling layer f absorbs the change, does not affect the volume of the inner cylinder, and does not cause loosening between the detection members in the inner cylinder. Further, even if the inner cylinder is heated, the heat is easily dissipated to the outside through the soft packed layer f, and there is no heat accumulation in the inner cylinder, and thermal expansion or contraction is suppressed as much as possible. Therefore, the characteristics of the output signal generated from the piezoelectric element are stabilized, and there are excellent effects such as being able to accurately detect pressure changes within the cylinder.
第１図は一実施例の縦断側面図、第２図は従来
装置の縦断側面図である。
２０……取付金具、２１……螺子部、２２……
貫通孔、２６……取付鍔、２９……圧電素子板、
４０……ダイヤフラム、ｆ……充填層。
FIG. 1 is a vertical side view of one embodiment, and FIG. 2 is a vertical side view of a conventional device. 20...Mounting bracket, 21...Screw part, 22...
Through hole, 26...Mounting collar, 29...Piezoelectric element plate,
40...Diaphragm, f...Filled layer.
Claims (1)
付金具内に貫通孔を形成し、該貫通孔内に少なく
とも圧電素子板、圧力伝達杆を収納した内筒を配
設して取付金具側に部分固定し、さらに該内筒の
シリンダー側端から突出する圧力伝達杆の検知端
を、取付金具の貫通孔端部を覆う金属製ダイアフ
ラムと連結するとともに、前記貫通孔の内面と、
内筒周囲間に軟質充填層を介装したことを特徴と
する内燃機関の圧力センサー。 A through hole is formed in a mounting bracket to be attached to a cylinder block of an internal combustion engine, and an inner cylinder housing at least a piezoelectric element plate and a pressure transmission rod is disposed in the through hole and partially fixed to the mounting bracket, Furthermore, the sensing end of the pressure transmission rod protruding from the cylinder side end of the inner cylinder is connected to a metal diaphragm that covers the end of the through hole of the mounting bracket, and the inner surface of the through hole
A pressure sensor for an internal combustion engine, characterized in that a soft packed layer is interposed between the periphery of an inner cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986175982U JPH0539476Y2 (en) | 1986-11-15 | 1986-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986175982U JPH0539476Y2 (en) | 1986-11-15 | 1986-11-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6381229U JPS6381229U (en) | 1988-05-28 |
| JPH0539476Y2 true JPH0539476Y2 (en) | 1993-10-06 |
Family
ID=31115804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986175982U Expired - Lifetime JPH0539476Y2 (en) | 1986-11-15 | 1986-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0539476Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203103A (en) * | 2010-03-25 | 2011-10-13 | Kyocera Corp | Piezoelectric module and glow plug including the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122334A (en) * | 1981-01-22 | 1982-07-30 | Nippon Soken Inc | Pressure sensor |
| JPS57198811A (en) * | 1981-05-20 | 1982-12-06 | List Hans | Measuring sensor with piezo-electric detecting element |
-
1986
- 1986-11-15 JP JP1986175982U patent/JPH0539476Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122334A (en) * | 1981-01-22 | 1982-07-30 | Nippon Soken Inc | Pressure sensor |
| JPS57198811A (en) * | 1981-05-20 | 1982-12-06 | List Hans | Measuring sensor with piezo-electric detecting element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203103A (en) * | 2010-03-25 | 2011-10-13 | Kyocera Corp | Piezoelectric module and glow plug including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6381229U (en) | 1988-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0430445B1 (en) | Piezoelectric pressure sensor | |
| US5101659A (en) | Mounting device for pressure sensor | |
| US6539787B1 (en) | Glow plug having a combustion pressure sensor | |
| US5517073A (en) | Pressure sensor | |
| US5038069A (en) | Cylinder pressure sensor for an internal combustion engine | |
| JPH03503565A (en) | Pressure sensor for detecting pressure in the combustion chamber of an internal combustion engine | |
| EP0179611B1 (en) | Cylinder pressure transmitter for an internal combustion engine | |
| JPH0539476Y2 (en) | ||
| JPH0528504Y2 (en) | ||
| JPH0351727Y2 (en) | ||
| JPH0612509Y2 (en) | Internal combustion engine pressure sensor | |
| JPH0338675Y2 (en) | ||
| JPH0323550Y2 (en) | ||
| JPH0411145Y2 (en) | ||
| JPS60157032A (en) | Transmission device for cylinder pressure of internal combustion engine | |
| JP3322730B2 (en) | Signal converter for detecting change in cylinder internal pressure of internal combustion engine | |
| JPH0338674Y2 (en) | ||
| JPS6121818Y2 (en) | ||
| US20050022582A1 (en) | Engine knock sensor | |
| JP2548688Y2 (en) | Pressure sensor | |
| JPH0643538U (en) | Pressure sensor | |
| JPH0127586Y2 (en) | ||
| JPH0781925B2 (en) | Cylinder pressure detector | |
| JPS6117288B2 (en) | ||
| JPH06313746A (en) | Pressure sensor |