EP2702378A1 - Apparatus for detecting a pressure, in particular a combustion space pressure of an internal combustion engine - Google Patents
Apparatus for detecting a pressure, in particular a combustion space pressure of an internal combustion engineInfo
- Publication number
- EP2702378A1 EP2702378A1 EP12712979.9A EP12712979A EP2702378A1 EP 2702378 A1 EP2702378 A1 EP 2702378A1 EP 12712979 A EP12712979 A EP 12712979A EP 2702378 A1 EP2702378 A1 EP 2702378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor module
- sensor
- compensation body
- transmission element
- pressure
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/08—Testing internal-combustion engines by monitoring pressure in cylinders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/008—Transmitting or indicating the displacement of flexible diaphragms using piezoelectric devices
-
- 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
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
-
- 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
- G01L23/08—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 operated electrically
- G01L23/10—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 operated electrically by pressure-sensitive members of the piezoelectric type
Definitions
- the invention relates to a device for detecting a pressure, in particular a combustion chamber pressure of an internal combustion engine according to the features of claim 1.
- Devices for detecting the combustion chamber pressure of an internal combustion engine are known, for example from DE 10 2010 038 798. Two embodiments are described, wherein the one embodiment describes a single device for detecting the combustion chamber pressure, in which a sensor module with a sensor element for pressure detection is arranged in a housing , wherein the pressure of the combustion chamber is transmitted via a membrane to the sensor element.
- the further embodiment relates to an integrated solution of a sensor module with a sensor element for pressure detection, in which the sensor module is integrated in a glow plug, wherein the sensor module is coupled to a glow plug of the glow plug. The pressure of the combustion chamber is transmitted to the sensor element via the glow plug.
- Object of the present invention is to make the sensor module so that the device for detecting the pressure is easier and more efficient to install.
- the sensor element has a rectangular, preferably a quadrangular cross section, at right angles to the axial extent of the sensor module. It is expedient for the force transmission and force distribution if the transmission element has an angular cross-section which is substantially at right angles to the axial extent of the sensor module and which is substantially adapted to the angular cross-section of the sensor element.
- An advantageous embodiment of the centered recording of the transmission element in the compensation body is achieved when the recess formed on the compensation body is circular, when the corners of the transmission element are provided with rounded portions, when the rounded portions have a common rounding circle, and when the transmission element with the rounding in the circular recess of the compensation body is inserted.
- the centered assembly of sensor module and compensation body is facilitated if the common rounding circle for the rounding has a smaller diameter than the diameter of the circular recess on the compensation body. This creates a clearance fit for receiving the transmission element in the circular recess of the compensation body.
- the sensor module further comprises a support element with which the sensor module is supported on a fixing element.
- the fixing element is firmly connected to the adapter element via a sleeve-shaped connecting part.
- the power transmission from the pressure sensor to the sensor module via a force path by the compensation body is supported on a support of the adapter element and by the sensor module between the compensation body and a fixed element is biased by a biasing force.
- a good handling of the sensor module during assembly of the device is thereby possible if the sensor module with the transmission element, the sensor element and the support element is fixed and centered by means of a shrink tube.
- FIG. 1 shows a sectional view through a device for detecting the pressure in a combustion chamber of an internal combustion engine
- Figure 2 is a sectional view through a sensor module of the device
- FIG. 3 shows a sectional view through a transmission element from FIG. 2 and
- FIG. 4 shows a sectional view along the line IV-IV in FIG. 2.
- the device for detecting the pressure in a combustion chamber of an internal combustion engine has at least one housing 10, in which a sensor module 12 is arranged, which is acted upon via a force path 14 with the pressure of the combustion chamber.
- the sensor module 12 comprises a sensor element 20, on the combustion chamber side, a transmission element 21 and on the opposite side, a support element 22 is attached.
- the sensor element 20 which is embodied as a piezoelectric sensor, has a rectangular cross section, preferably a square cross section, at right angles to the axial extent of the sensor module 12.
- the sensor element 20 has contact surfaces which are contacted with electrical connection lines, which are designed for example as a flat busbars 50.
- the busbars 50 lead in the axial direction to contact points, not shown.
- the force path 14 includes a pressure transducer 16, a compensation body
- the compensation body 25 for temperature compensation, an adapter element 26, a sleeve-shaped connecting part 27 and a fixing 28.
- the compensation body 25 is preferably designed rotationally symmetrical.
- the adapter element 26 is designed with a first section part 31, a second section part 32 and a bending-elastic web 33 running substantially radially therebetween.
- the adapter element 26 is fixedly connected to the second section part 32 on the housing 10.
- the connection of the adapter element 26 to the housing 10 is effected by the second portion portion 32 is fixedly connected to the inner wall of the housing 10, for example by welding.
- the adapter element 26 is furthermore connected to the pressure sensor 16 on the combustion chamber side on the first section part 31 and to the compensation body 25 on the side opposite thereto.
- the first section part 31 is designed with a receptacle 35, on which the pressure sensor 16 is seated.
- the first section part 31 has a support 36, on which the compensation body 25 is supported.
- the compensation module 25 is connected upstream of the sensor module 12 on the force path 14.
- the compensation body 25 can be set up, for example, by a suitable choice of its length and / or its thermal expansion coefficient, so that the thermal expansions of the different transmission paths are at least largely identical, at least within typical temperature ranges to which the device can be exposed.
- the pressure sensor 16 is in a stand-alone device shown in Figure 1 for detecting the combustion chamber pressure with a diaphragm 18 in communication, which is exposed to the combustion chamber. This device is solely for detecting the combustion chamber pressure of an internal combustion engine. In a further, not shown embodiment, the pressure transducer 16 is formed for example by a glow tube of a glow plug, which is exposed to the combustion chamber of the internal combustion engine.
- the sensor module 12 is inserted between the compensation body 25 and the fixing element 28 by means of a bias voltage.
- the transmission element 21, which is made of a ceramic material supports the pressure transducer side on the compensation body 25 from. Fixing element side, the sensor module 12 is supported by means of the support member 22 on the fixing element 28.
- the components adjacent to the angular sensor element 20 are connected to the transmission element
- the sensor element 20 is designed quadrangular with a square cross-section.
- the transmission element 21 is perpendicular to the axial extent of the sensor module 12 adapted to the cross section of the sensor element 20 also square with a square cross section.
- the Ab space- element 22 has a first portion 51 which is perpendicular to the axial extent of the sensor module 12, likewise adapted to the cross section of the sensor element 20, has a square cross-section.
- the compensation body 25 is provided on a front side 39 facing the sensor module 12 with a circular recess 42 in which the transmission element 21 is received with an end face 44.
- the four corners of the transmission element 21 according to FIGS. 3 and 4 are provided with rounded portions 40 which lie on a common virtual rounding circle 41.
- the diameter of the circular recess 42 is slightly larger than the diameter of the virtual rounding circle 41 on the transmission element 21.
- a slight clearance is created between the rounding circle 41 and the circular recess 42, which for assembly reasons, the insertion of the transmission element 21 in the circular Recess 42 facilitates.
- the support element 22 has, in addition to the already mentioned first section 51, which is adapted at right angles to the axial extension of the sensor module 12 to the cross section of the sensor element 20, a second section 52 with a larger cross-section.
- the second section 52 is designed, for example, cylindrically with an outer circumferential surface 54.
- the support member 22 is supported on the fixing element 28.
- the two bus bars 50 abut, so as to form a defined distance for the axial guidance of the bus bars 50.
- the assembly process is further improved to the effect that the sensor module 12 is surrounded by a shrink tube 46 with which the components of the sensor module 12 are fixed during the assembly process.
- the shrink tubing 46 After the shrinking of the sensor module 12 with the shrink tubing 46 this assumes the fixation and thus the centering of the transmission element 21, of the sensor element 20 and the support element 22 within the sensor module 12.
- the busbars 50 are fixed to the support element 22 by means of the shrink tubing 46.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011017647A DE102011017647A1 (en) | 2011-04-28 | 2011-04-28 | Device for detecting a pressure, in particular a combustion chamber pressure of an internal combustion engine |
PCT/EP2012/054004 WO2012146429A1 (en) | 2011-04-28 | 2012-03-08 | Apparatus for detecting a pressure, in particular a combustion space pressure of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2702378A1 true EP2702378A1 (en) | 2014-03-05 |
Family
ID=45937231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12712979.9A Withdrawn EP2702378A1 (en) | 2011-04-28 | 2012-03-08 | Apparatus for detecting a pressure, in particular a combustion space pressure of an internal combustion engine |
Country Status (6)
Country | Link |
---|---|
US (1) | US9016115B2 (en) |
EP (1) | EP2702378A1 (en) |
JP (1) | JP5698409B2 (en) |
CN (1) | CN103492847B (en) |
DE (1) | DE102011017647A1 (en) |
WO (1) | WO2012146429A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011017667A1 (en) * | 2011-04-28 | 2012-10-31 | Robert Bosch Gmbh | Device for detecting a pressure, in particular a combustion chamber pressure of an internal combustion engine |
US20160153443A1 (en) * | 2013-10-30 | 2016-06-02 | Lime Instruments, Llc | Sensor assembly for measuring dynamic pressure in reciprocating pumps |
DE102018113935A1 (en) | 2018-06-12 | 2019-12-12 | IMES Intelligent Measuring Systems GmbH | Diaphragm pressure sensor with measuring spring support tube and pressure sensor coated on it |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0430445A2 (en) * | 1989-11-02 | 1991-06-05 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric pressure sensor |
WO2010136229A1 (en) * | 2009-05-25 | 2010-12-02 | Robert Bosch Gmbh | Device for registering a combustion chamber pressure of an internal combustion engine |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5860234A (en) * | 1981-10-06 | 1983-04-09 | Toyota Central Res & Dev Lab Inc | Knocking sensor |
JPS6378238A (en) | 1986-09-22 | 1988-04-08 | Toshiba Corp | Object code generating device |
JPH0338675Y2 (en) * | 1986-11-10 | 1991-08-15 | ||
USRE34441E (en) * | 1989-03-30 | 1993-11-16 | AVL Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H. Prof.Dr.Dr.h.c. Hans List | Pressure sensor |
DE4009377A1 (en) * | 1990-03-23 | 1991-10-02 | Bosch Gmbh Robert | PRESSURE SENSOR FOR DETECTING PRINTERS IN THE COMBUSTION CHAMBER OF COMBUSTION ENGINES |
DE4103705A1 (en) * | 1990-07-18 | 1992-01-23 | Bosch Gmbh Robert | PRESSURE SENSOR FOR DETECTING PRINTERS IN THE COMBUSTION CHAMBER OF COMBUSTION ENGINES |
DE4103704A1 (en) * | 1990-07-18 | 1992-01-23 | Bosch Gmbh Robert | PRESSURE SENSOR FOR DETECTING PRINTERS IN THE COMBUSTION CHAMBER OF COMBUSTION ENGINES |
DE4103706A1 (en) * | 1990-07-18 | 1992-01-30 | Bosch Gmbh Robert | PRESSURE SENSOR FOR DETECTING PRINTERS IN THE COMBUSTION CHAMBER OF COMBUSTION ENGINES |
JPH04131722A (en) * | 1990-09-21 | 1992-05-06 | Toyota Motor Corp | Pressure sensor and manufacture of pressure sensor |
US5606117A (en) * | 1991-02-27 | 1997-02-25 | Robert Bosch Gmbh | Pressure sensor for measuring pressure in an internal combustion engine |
JPH04290937A (en) * | 1991-03-19 | 1992-10-15 | Matsushita Electric Ind Co Ltd | Piezo type pressure sensor |
JPH0719981A (en) * | 1993-06-01 | 1995-01-20 | Nippondenso Co Ltd | High-temperature pressure sensor |
DE19538854C1 (en) * | 1995-10-19 | 1996-08-08 | Bosch Gmbh Robert | Pressure detector for combustion chamber of internal combustion engine |
CN2266737Y (en) * | 1996-08-28 | 1997-11-05 | 泰和电气(襄樊)有限公司 | Oilfield logging pressure sensor |
US6487898B1 (en) * | 1997-01-28 | 2002-12-03 | Eaton Corporation | Engine cylinder pressure sensor with thermal compensation element |
DE102004007202B4 (en) * | 2003-02-17 | 2016-06-16 | Denso Corporation | Pressure detector with elongated housing for receiving a pressure-sensitive element |
US6923068B2 (en) * | 2003-06-19 | 2005-08-02 | Dynisco, Inc. | Pressure transducer |
DE102004031582A1 (en) * | 2004-06-29 | 2006-02-09 | Endress + Hauser Gmbh + Co. Kg | Duckaufnehmer |
WO2007043068A1 (en) * | 2005-10-10 | 2007-04-19 | Gefran S.P.A. | Pressure sensor |
DE102006008350A1 (en) * | 2006-02-21 | 2007-08-30 | Robert Bosch Gmbh | Pressure measuring glow plug for arranging in chamber of internal combustion engine has centering element and pressure sensor assembled together, wherein centering section of centering element engages in recess of pressure sensor |
DE102009022539A1 (en) * | 2009-05-25 | 2010-12-02 | Robert Bosch Gmbh | Device for detecting a combustion chamber pressure of an internal combustion engine |
DE102010038798A1 (en) | 2010-08-02 | 2012-02-02 | Robert Bosch Gmbh | Device for detecting a combustion chamber pressure |
-
2011
- 2011-04-28 DE DE102011017647A patent/DE102011017647A1/en not_active Withdrawn
-
2012
- 2012-03-08 US US14/113,870 patent/US9016115B2/en not_active Expired - Fee Related
- 2012-03-08 EP EP12712979.9A patent/EP2702378A1/en not_active Withdrawn
- 2012-03-08 JP JP2014506801A patent/JP5698409B2/en not_active Expired - Fee Related
- 2012-03-08 WO PCT/EP2012/054004 patent/WO2012146429A1/en active Application Filing
- 2012-03-08 CN CN201280020237.5A patent/CN103492847B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0430445A2 (en) * | 1989-11-02 | 1991-06-05 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric pressure sensor |
WO2010136229A1 (en) * | 2009-05-25 | 2010-12-02 | Robert Bosch Gmbh | Device for registering a combustion chamber pressure of an internal combustion engine |
Non-Patent Citations (1)
Title |
---|
See also references of WO2012146429A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2014515109A (en) | 2014-06-26 |
US9016115B2 (en) | 2015-04-28 |
CN103492847B (en) | 2015-07-22 |
DE102011017647A1 (en) | 2012-10-31 |
WO2012146429A1 (en) | 2012-11-01 |
US20140102185A1 (en) | 2014-04-17 |
JP5698409B2 (en) | 2015-04-08 |
CN103492847A (en) | 2014-01-01 |
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Legal Events
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17Q | First examination report despatched |
Effective date: 20170717 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: G01L 23/10 20060101ALI20181120BHEP Ipc: G01M 15/08 20060101AFI20181120BHEP Ipc: G01L 9/00 20060101ALI20181120BHEP Ipc: G01L 19/04 20060101ALI20181120BHEP |
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18D | Application deemed to be withdrawn |
Effective date: 20190723 |