JP2003505689A - Pressure sensor - Google Patents
Pressure sensorInfo
- Publication number
- JP2003505689A JP2003505689A JP2001512264A JP2001512264A JP2003505689A JP 2003505689 A JP2003505689 A JP 2003505689A JP 2001512264 A JP2001512264 A JP 2001512264A JP 2001512264 A JP2001512264 A JP 2001512264A JP 2003505689 A JP2003505689 A JP 2003505689A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- passage
- pressure sensor
- section
- intake pipe
- 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
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
-
- 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
- G01L23/24—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 specially adapted for measuring pressure in inlet or exhaust ducts of internal-combustion engines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
(57)【要約】 本発明は、吸気管を備えた内燃機関のための圧力センサであって、センサ面（１１′）と、該センサ面を吸気管（１２）の内部に接続するセンサ通路（１４）とが設けられている形式のものに関する。センサ通路（１４）は、不凍液（２０）で満たされた区分（１８）を有している。 (57) Abstract: The present invention relates to a pressure sensor for an internal combustion engine having an intake pipe, and a sensor surface (11 ') and a sensor passage connecting the sensor surface to the inside of the intake pipe (12). (14). The sensor passage (14) has a section (18) filled with antifreeze (20).
Description
【０００１】
本発明は、請求項１の上位概念に記載した形式の、センサ面と、該センサ面を媒
体通路の内部に接続するセンサ通路とが設けられている、特に内燃機関のための
圧力センサに関する。The invention relates to a pressure sensor, in particular of the type described in the preamble of claim 1, provided with a sensor surface and a sensor channel connecting the sensor surface to the interior of a medium channel. Regarding sensors.
【０００２】
背景技術
ドイツ連邦共和国特許出願公開第４３１７３１２号明細書に基づき公知の圧力
センサは、管片状の圧力端子を備えたプラスチックケーシングを有しており且つ
吸気管に組み込まれた状態では、内燃機関の吸気管の内壁とほぼ同一平面で合致
しているか、又はこの吸気管の内壁から数ミリメートルだけ突出している。しか
し、吸気管に直接に取り付けられたこのような圧力センサの場合は、圧力端子の
凍結の危険があるので、凍結によって圧力センサが故障する恐れがある。センサ
通路若しくはこのセンサ通路に含まれる流体、又はこの流体の液状成分の前記の
ような凍結時には、センサダイヤフラムはこれを破断する程の高圧で負荷される
恐れがある。BACKGROUND OF THE INVENTION A pressure sensor known from DE-A-4317312 has a plastic casing with a pressure terminal in the form of a tube and in the state of being installed in an intake pipe, It is substantially flush with the inner wall of the intake pipe of the internal combustion engine, or projects from the inner wall of the intake pipe by a few millimeters. However, in the case of such a pressure sensor directly attached to the intake pipe, there is a risk of freezing the pressure terminal, and there is a risk that the pressure sensor will fail due to freezing. When the sensor passage, the fluid contained in the sensor passage, or the liquid component of the fluid freezes as described above, the sensor diaphragm may be loaded with a pressure high enough to break it.
【０００３】
ドイツ連邦共和国特許出願公開第１９５１７６７６号明細書に基づき公知の圧
力センサの場合、前記のような凍結を防止するために、吸気管壁に設けられたセ
ンサ通路を吸気管のほぼ中央にまで延長させるチューブが設けられている。但し
この構成は、吸気管内の流れ抵抗を高める。In the case of the pressure sensor known from DE-A 19517676, in order to prevent the above-mentioned freezing, a sensor passage provided in the intake pipe wall is provided approximately in the center of the intake pipe. There is a tube that extends to. However, this configuration increases the flow resistance in the intake pipe.
【０００４】
発明の利点
請求項１の特徴部に記載の本発明による圧力センサは、従来技術と比べて、圧
力センサの凍結が確実に排除されているという利点を有している。センサダイヤ
フラムのすぐ手前に配置された不凍液（例えばビンガム流体又はバイエル社のス
マート流体並びに場合によっては高粘度の流体）は、機械的な変形における特定
の段階で急変する流れ特性を有している。Advantages of the invention The pressure sensor according to the invention as defined in the characterizing part of claim 1 has the advantage over the prior art that the freezing of the pressure sensor is reliably eliminated. Antifreeze liquids (e.g. Bingham fluid or Bayer's smart fluid and possibly highly viscous fluids) placed immediately in front of the sensor diaphragm have flow properties that change rapidly at certain stages of mechanical deformation.
【０００５】
高粘度の媒体の場合、粘性の大きさは部分的に著しく温度に関連している。ビ
ンガム流体の代わりに、前記のような高粘度の媒体が凍結防止用に使用されると
、この媒体は、吸気管内の流れ媒体の凍結点付近では、通常の温度と比較してそ
の粘度が約千倍にならざるを得ない。これにより、高粘度の媒体はビンガム媒体
と同様に振る舞って凝固し且つセンサ通路を遮断するので、ダイヤフラムの破壊
にまで至る、更なる圧力増大が防止される。（著しく高粘度の媒体は、例えばグ
ルコースシロップ又はLuviskolである。）
変形しきい値の下位にはニュートン流れ特性が存在するのに対して、前記変形
しきい値の上位では、使用される流体は固体と同様に振る舞う。つまり、媒体若
しくはこの媒体に含まれる液体の凍結により、センサ通路の露出区分において、
使用される不凍液の変形しきい値に対応する圧力が得られるので、前記不凍液が
凝固して、センサダイヤフラムを更なる圧力増大から保護する。このようにして
、本発明による圧力センサでは、媒体若しくはこの媒体に含まれる液体の凍結に
より圧力通路内でセンサダイヤフラムが破壊されるということが、媒体通路若し
くは内燃機関の吸気管内の流れ抵抗を著しく高めること無く防止される。In the case of highly viscous media, the magnitude of the viscosity is partly strongly temperature related. If, instead of Bingham fluid, a high-viscosity medium as described above is used for anti-freezing, this medium will have a viscosity near the freezing point of the flow medium in the intake pipe, which is approximately equal to the normal temperature. There is no choice but to multiply by a thousand times. This causes the highly viscous medium to behave like the Bingham medium to solidify and block the sensor passage, thus preventing further pressure buildup leading to diaphragm failure. (A medium of very high viscosity is eg glucose syrup or Luviskol.) Below the deformation threshold there is Newtonian flow properties, whereas above the deformation threshold the fluid used is Behaves like a solid. In other words, due to the freezing of the medium or the liquid contained in this medium, in the exposed section of the sensor passage,
Since a pressure corresponding to the deformation threshold of the antifreeze used is obtained, the antifreeze solidifies and protects the sensor diaphragm from further pressure buildup. In this way, in the pressure sensor according to the present invention, the fact that the sensor diaphragm is broken in the pressure passage due to the freezing of the medium or the liquid contained in this medium significantly reduces the flow resistance in the medium passage or the intake pipe of the internal combustion engine. Prevented without increasing.
【０００６】
この場合、不凍液の選択は、その都度流れ媒体若しくはこの流れ媒体に含まれ
る液体の凍結温度に関連している。In this case, the choice of antifreeze is in each case related to the freezing temperature of the flow medium or the liquid contained in this flow medium.
【０００７】
請求項１記載の圧力センサの有利な改良は、請求項２以下に記載の手段によっ
て可能である。Advantageous refinements of the pressure sensor according to claim 1 are possible by the measures according to claim 2 and the following.
【０００８】 実施例の説明 以下に、本発明の実施例を図面につき詳しく説明する。[0008] Example description Embodiments of the present invention will be described below in detail with reference to the drawings.
【０００９】
図面には、例えば内燃機関の吸気管等の媒体通路１２が、部分的に中心軸線１
２′まで断面されて示されている。以下は吸気管１２とだけ呼ぶ前記媒体通路の
壁１３は、中心軸線１２′に対してほぼ直角に延び且つ当該壁１３を半径方向で
貫通するセンサ通路１４を有している。In the drawing, a medium passage 12, for example an intake pipe of an internal combustion engine, is partially shown with a central axis 1
It is shown sectioned to 2 '. The wall 13 of the medium passage, which will be referred to below as the intake pipe 12, has a sensor passage 14 which extends substantially at right angles to the central axis 12 'and extends radially through the wall 13.
【００１０】
圧力センサ１０は、吸気管１２の外側で壁１３に取り付けられており、センサ
区分１１を以てセンサ通路１４に係合している。前記センサ区分１１の自由端部
域にはダイヤフラム１１′が設けられている。The pressure sensor 10 is mounted on the wall 13 outside the intake pipe 12 and engages the sensor passage 14 with the sensor section 11. A diaphragm 11 ′ is provided in the free end area of the sensor section 11.
【００１１】
センサ通路１４は実質的に２つの区分、つまり、吸気管１２の内部に面した露
出区分１６と圧力センサ側区分１８とを有している。センサ通路１４の圧力セン
サ側区分１８の直径は露出区分１６の直径よりも大きいので、圧力センサ側区分
１８の横断面は露出区分１６の横断面よりも大きい。このようにして、圧力セン
サに面した空洞状のスペースが、吸気管１２の壁１３の内部でセンサ通路１４を
取り囲んで形成されて、不凍液２０で満たされている。この場合、ダイヤフラム
１１′を備えたセンサ区分１１の自由端部は、不凍液２０によって包囲されてい
る。センサ通路１４の露出区分１６は不凍液で満たされてはいないので、この露
出区分１６は、不凍液２０で満たされたセンサ通路１４の圧力センサ側区分１８
と、吸気管１２の内部との間の接続部を形成している。The sensor passage 14 has substantially two sections, an exposed section 16 facing the interior of the intake pipe 12 and a pressure sensor side section 18. Since the diameter of the pressure sensor side section 18 of the sensor passage 14 is larger than the diameter of the exposed section 16, the cross section of the pressure sensor side section 18 is larger than the cross section of the exposed section 16. In this way, a hollow space facing the pressure sensor is formed inside the wall 13 of the intake pipe 12 surrounding the sensor passage 14 and filled with the antifreeze liquid 20. In this case, the free end of the sensor section 11 with the diaphragm 11 ′ is surrounded by the antifreeze liquid 20. Since the exposed section 16 of the sensor passage 14 is not filled with antifreeze, this exposed section 16 is a pressure sensor side section 18 of the sensor passage 14 filled with antifreeze 20.
And the inside of the intake pipe 12 are formed.
【００１２】
センサ通路は、少なくとも区分毎に毛管として形成されており、この場合、毛
管現象及び毛管直径の算出は、当業者に概ね公知の方程式に従って行われる。The sensor passages are formed as capillaries at least in each section, in which case the capillarity and the capillary diameter are calculated according to equations generally known to those skilled in the art.
【００１３】
この実施例に対して択一的に、センサ通路１４の不凍液２０を含む区分１８は
、吸気管１２の壁１３に設けられた開口に挿入可能な圧力センサ１０の付加部に
形成されていてもよい。As an alternative to this embodiment, the section 18 of the sensor passage 14 containing the antifreeze liquid 20 is formed in an additional part of the pressure sensor 10 insertable into an opening provided in the wall 13 of the intake pipe 12. May be.
【００１４】
吸気管１２を通流する媒体の標準状態では、つまり、この媒体に含まれる流体
が、その凍結点若しくは基準点の上位の温度を有している場合は、当該流れ媒体
の静的な圧力が、センサ通路１４の露出区分１６に面した不凍液２０の露出面に
作用し、この不凍液２０を介してダイヤフラム１１′に伝達される。この場合、
不凍液はニュートン流体と同様に振る舞う。これに対して、センサ通路１４の露
出区分１６において、吸気管２を通流する媒体に含まれる流体が凍結した場合は
、これにより惹起される圧力増大が不凍液２０に作用してこの不凍液２０が凝固
され、増大された押圧力はセンサ通路１４の圧力センサ側区分１８の壁に支持さ
れ、これによりダイヤフラム１１′には伝達されなくなる。In the standard state of the medium flowing through the intake pipe 12, that is, when the fluid contained in the medium has a temperature above the freezing point or the reference point, the static state of the flowing medium is obtained. Pressure acts on the exposed surface of the antifreeze liquid 20 facing the exposed section 16 of the sensor passage 14 and is transmitted via this antifreeze liquid 20 to the diaphragm 11 ′. in this case,
Antifreeze behaves like Newtonian fluid. On the other hand, in the exposed section 16 of the sensor passage 14, when the fluid contained in the medium flowing through the intake pipe 2 is frozen, the pressure increase caused by this acts on the antifreeze liquid 20 and the antifreeze liquid 20 is formed. The solidified and increased pressing force is supported on the wall of the pressure sensor side section 18 of the sensor passage 14 and is thus not transmitted to the diaphragm 11 '.
【図１】
例えば本発明による圧力センサを備えた吸気管等の媒体通路を部分的に断面し
て示した図である。FIG. 1 is a partial cross-sectional view of a medium passage such as an intake pipe provided with a pressure sensor according to the present invention.
１０ 圧力センサ、 １１ センサ区分、 １１′ ダイヤフラム、 １２
吸気管、 １２′ 中心軸線、 １３ 壁、 １４ センサ通路、 １６ 露出
区分、 １８ 圧力センサ側区分、 ２０ 不凍液10 pressure sensor, 11 sensor division, 11 'diaphragm, 12
Intake pipe, 12 'central axis, 13 wall, 14 sensor passage, 16 exposed section, 18 pressure sensor side section, 20 antifreeze liquid
Claims (5)
サ面（１１′）と、該センサ面を媒体通路（１２）の内部に接続するセンサ通路
（１４）とが設けられている形式のものにおいて、 センサ通路（１４）が、不凍液（２０）で満たされた区分（１８）を有してい
ることを特徴とする圧力センサ。1. A pressure sensor for an internal combustion engine having an intake pipe, comprising a sensor surface (11 ') and a sensor passage (14) connecting the sensor surface to the inside of a medium passage (12). Pressure sensor of the type provided, characterized in that the sensor passage (14) has a section (18) filled with antifreeze liquid (20).
分（１８）と媒体通路（１２）の内部との間に露出区分（１６）を有している、
請求項１記載の圧力センサ。2. The sensor passage (14) has an exposed section (16) between the pressure sensor side section (18) filled with antifreeze and the interior of the medium passage (12).
The pressure sensor according to claim 1.
されている、請求項１又は２記載の圧力センサ。3. The pressure sensor according to claim 1, wherein the sensor passage (14) is formed in the wall (13) of the medium passage (12).
ンサ通路（１４）の露出区分（１６）の横断面よりも大きな横断面を有するスペ
ースとして形成されている、請求項１から３までのいずれか１項記載の圧力セン
サ。4. The pressure sensor side section (18) of the sensor passage (14) is formed as a space having a larger cross section than the cross section of the exposed section (16) of the sensor passage (14). The pressure sensor according to any one of items 1 to 3.
れている、請求項１から４までのいずれか１項記載の圧力センサ。5. The pressure sensor according to claim 1, wherein the sensor channel (14) is formed as a capillary at least in each section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934832.4 | 1999-07-24 | ||
| DE19934832A DE19934832A1 (en) | 1999-07-24 | 1999-07-24 | Pressure sensor for IC engine air intake pipe has anti-freeze fluid in section of sensor channel coupling pressure sensor to air intake pipe closest to sensor surface |
| PCT/DE2000/002318 WO2001007884A1 (en) | 1999-07-24 | 2000-07-15 | Pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003505689A true JP2003505689A (en) | 2003-02-12 |
Family
ID=7915963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001512264A Pending JP2003505689A (en) | 1999-07-24 | 2000-07-15 | Pressure sensor |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1116016A1 (en) |
| JP (1) | JP2003505689A (en) |
| KR (1) | KR20010075075A (en) |
| DE (1) | DE19934832A1 (en) |
| WO (1) | WO2001007884A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100542997B1 (en) | 2003-08-07 | 2006-01-20 | 삼성에스디아이 주식회사 | FPD and Method of fabricating the same |
| DE10349143B4 (en) * | 2003-10-17 | 2006-05-24 | Daimlerchrysler Ag | dosing |
| JP4792427B2 (en) | 2007-06-15 | 2011-10-12 | トヨタ自動車株式会社 | Piping waterproof connection structure |
| US20090017337A1 (en) * | 2007-07-10 | 2009-01-15 | Dirk Wexel | Freeze tolerant pressure sensor |
| DE102008026611B4 (en) * | 2008-06-03 | 2013-01-24 | Continental Automotive Gmbh | Pressure sensor assembly |
| KR200457853Y1 (en) * | 2010-01-23 | 2012-01-10 | 김외출 | Device for drooping a branch of fruit-tree |
| US8347737B2 (en) * | 2011-01-10 | 2013-01-08 | GM Global Technology Operations LLC | Pressure sensor for use in fuel cell systems |
| CN102998047A (en) * | 2011-09-19 | 2013-03-27 | 洪河 | Radial corrugated pipe diaphragm-freezing-preventive pressure gauge with fluorescent indications on dial scales |
| DE102017217684A1 (en) * | 2017-10-05 | 2019-04-11 | Bayerische Motoren Werke Aktiengesellschaft | Intake tract for an internal combustion engine of a motor vehicle |
| CN111707407A (en) * | 2020-05-28 | 2020-09-25 | 延长油田股份有限公司定边采油厂 | Anti-spraying and anti-freezing protection device for pressure gauge |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61246642A (en) * | 1985-04-24 | 1986-11-01 | Nippon Denso Co Ltd | Pressure sensor |
| DE19517676B4 (en) * | 1995-05-13 | 2008-01-31 | Robert Bosch Gmbh | Pressure sensor for an internal combustion engine with an intake pipe |
| US5792958A (en) * | 1997-01-21 | 1998-08-11 | Honeywell Inc. | Pressure sensor with a compressible insert to prevent damage from freezing |
-
1999
- 1999-07-24 DE DE19934832A patent/DE19934832A1/en not_active Withdrawn
-
2000
- 2000-07-15 WO PCT/DE2000/002318 patent/WO2001007884A1/en not_active Application Discontinuation
- 2000-07-15 KR KR1020017003225A patent/KR20010075075A/en not_active Application Discontinuation
- 2000-07-15 JP JP2001512264A patent/JP2003505689A/en active Pending
- 2000-07-15 EP EP00958139A patent/EP1116016A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010075075A (en) | 2001-08-09 |
| DE19934832A1 (en) | 2001-01-25 |
| WO2001007884A1 (en) | 2001-02-01 |
| EP1116016A1 (en) | 2001-07-18 |
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