CN104246464A - Membrane for combustion chamber pressure sensor - Google Patents
Membrane for combustion chamber pressure sensor Download PDFInfo
- Publication number
- CN104246464A CN104246464A CN201380008787.XA CN201380008787A CN104246464A CN 104246464 A CN104246464 A CN 104246464A CN 201380008787 A CN201380008787 A CN 201380008787A CN 104246464 A CN104246464 A CN 104246464A
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- Prior art keywords
- pressure
- sensor diaphragm
- diaphragm
- pressure measurement
- wall thickness
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 32
- 239000012528 membrane Substances 0.000 title abstract description 10
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims description 19
- 230000035939 shock Effects 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 230000008602 contraction Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 description 15
- 238000005452 bending Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000237942 Conidae Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
- F23Q2007/004—Manufacturing or assembling methods
- F23Q2007/005—Manufacturing or assembling methods pressure sensors
Abstract
The invention relates to a pressure measurement device for an internal combustion engine, particularly for determining a combustion chamber pressure. The pressure measurement device comprises a housing (10) in which a sensor membrane (19, 20) is accommodated. Said sensor membrane separates a pressure space (24) from an empty space (22). The sensor membrane (19, 20) comprises a pressurised area (27) and seals off the housing (10) against the pressure to be measured. The pressurised area (27) of the sensor membrane (20) lies between a first deflection point (32) and a second deflection point (38) of the sensor membrane (20), each designed in reduced second and third wall thicknesses (34, 40) relative to a first wall thickness (28) of the sensor membrane.
Description
Background technology
DE 10 2,006 057 627 A1 relates to a kind of device for pressure measurement.This device for pressure measurement is for being arranged in the firing chamber of internal combustion engine.This device for pressure measurement has housing, force transmission element and pressure transducer, and this force transmission element partly stretches out at the opening part of the side, room of housing from housing.Described pressure transducer is arranged in the inner chamber of housing.At this, during pressure transducer and force transmission element are in and act on and being connected.This is outside equipped with diaphragm, and this diaphragm seals relative to the inner chamber of opening to the housing being wherein furnished with pressure transducer of side, room.The diaphragm being preferably configured as metallic membrane has force transmission element, and this force transmission element is along the axial orientation of force transmission element.In addition, during pressure transducer is in and acts on by means of power pass segment and the force transmission element of diaphragm and being connected.Compensate at least partially the length variations caused by heat of diaphragm thus, this length variations is such as caused by the fuel gas of heat and can cause cyclic effects to the pressure survey by means of pressure transducer.
DE 10 2,007 049 971 A1 relates to a kind of heater plug.Heater plug is for being arranged in the chamber of internal combustion engine.Heater plug has housing, bar-shaped heating element and pressure transducer, and described heating element partly stretches out from housing, and described pressure transducer is arranged in the inner chamber of housing.At this, during pressure transducer is on the one hand and bar-shaped heating element is in and act on and being connected, thus the pressure that the loading to heating element that causes due to the pressure be present in chamber of detection thus determine is present in chamber.In addition, pressure transducer is supported on the other hand on the retaining element that is connected with housing.Spring diaphragm seals relative to the inner chamber of chamber to housing of internal combustion engine.At this, spring diaphragm is designed to the spring diaphragm of S shape.Especially can realize pressure compensated setting by this design proposal, thus improve the tonometric precision by means of pressure transducer.
Diaphragm is needed to seal relative to the inner chamber of firing chamber to sensor in combustion chamber pressure sensor inside.The medium infiltrated especially destroys the component of sensor assembly and electron device due to chemical characteristic of its temperature and its corrosion within the shortest time.Meanwhile, described diaphragm should bear load during operating sensor.Belong to the repeated loading (each load change in serviceable life several hundred million) substantially having pressure to change of described load and the high level of medial temperature.
Summary of the invention
Propose by the present invention, design like this is made up of metal material, the diaphragm that can be used in combustion chamber pressure sensor, thus minimizing of the wall thickness of the described diaphragm be made up of metal material can be realized, wherein especially in the transitional region between the membrane surface and adjacent region of pressurized, realize minimizing of wall thickness.In addition by making the maximization of the spacing between the membrane surface of pressurized and this transitional region to realize the enough bending softness of diaphragm making to propose by the present invention, thus the path hindering critically and have pressure signal to be measured can be no more than.Described diaphragm hinders the path having pressure signal to be measured, and its mode is that the reception of described diaphragm has a part for pressure signal to be measured and is not delivered on the sensing mechanism of measurement sensing mechanism, such as piezoelectricity.Iff will reduce pressure signal transmission to measurement sensing mechanism on, so the measurement result of sensing mechanism owing to superposing with signal noise with inexactness.When hindering the inexactness having and no longer can reliably to compensate when the path of pressure signal to be measured because signal noise causes critically.Described bending flexibility realizes by the following method, thus makes the radial spacing between two steering positions maximize (diameter of about 7mm and the diameter of about 4.5mm).On the other hand the wall thickness in turn-around zone is minimized, as component intensity allow.Described wall thickness is such as only a few tenths of mm in the turn-around zone in outside, especially 0.2mm, and described wall thickness can be 0.2 to 0.35mm being arranged in the inner radius in other words that turns to.Achieve one " hinge (Schamier) " by these two steering positions mentioned, diaphragm is around this hinge distortion.
Advantageously, be especially suitable in combustion chamber pressure sensor, by the present invention propose diaphragm there is minimum thermal shock effect, the measuring accuracy of combustion chamber pressure sensor can be reduced by this thermal shock effect.This realizes in the following manner, and the region of namely shrinking prolongedly is configured in the turning point in outside, thus enables described diaphragm act on (arbeiten) and sidesway (seitlich ausweichen) in this region.The sidesway of the diaphragm be made up of metal material significantly reduces thermal shock effect.So, the region of contraction is such as made to extend about 2mm effect highly significant in thermal shock effect.In the geometric configuration that other are identical, the further prolongation in the region of contraction can cause the further reduction of thermal shock effect, but resists mutually with thermal shock effect about the requirement of sensor length.
In addition, the sidesway of diaphragm is subject to the impact of the position of other sizes, especially knuckle radius and the seal welding of diaphragm.When the prolongation in the region of shrinking being optimized when considering the parameter of other influences diaphragm sidesway, the design of diaphragm in thermal shock can be optimized further.
In addition, provide make the minimized scheme of the share of pressure signal by combustion chamber pressure sensor of the present invention, this pressure signal is not delivered to from diaphragm and measures sensing mechanism.Described measurement sensing mechanism operationally works on the high level of received pressure, more easily distinguishes pressure change and signal noise thus.There is by combustion chamber pressure sensor of the present invention the measuring accuracy of improvement.
Accompanying drawing explanation
Describe the present invention in detail with reference to the accompanying drawings below.
Accompanying drawing illustrates:
Fig. 1 and 2 is the schematic diagram of sensor diaphragm used up to now,
Fig. 3 is the sectional side elevation by combustion chamber pressure sensor of the present invention,
Fig. 4 has the schematic of combustion chamber pressure sensor of implementing the sensor diaphragm by the present invention's proposition of flexible program by first partly to cut open figure,
Fig. 5 is the cut-open view of the sensor diaphragm by the present invention's proposition of the first enforcement flexible program,
Fig. 6 is sensor diaphragm the second enforcement flexible program in the assembled state proposed by the present invention, and
Fig. 7 is the cut-open view of sensor diaphragm in its second embodiment proposed by the present invention.
Embodiment
Fig. 1 and 2 shows the sensor diaphragm by prior art.
Can know from Fig. 1 and 2, sensor diaphragm 19 constructs symmetrically relative to its axis of symmetry 18 and has diaphragm cover 26.Can know from by the cut-open view of Fig. 2, construct with the first wall thickness 28 by the sensor diaphragm 19 of prior art.
Fig. 3 shows the sectional side elevation of a kind of embodiment by combustion chamber pressure sensor of the present invention.This combustion chamber pressure sensor comprises housing 10, contains the depression bar 58 in the face of pressure chamber 24 in this housing.This depression bar 58 bears the pressure from pressure chamber 24 and converts the effect of pressure to moving along axis 18.Cavity 22 is constructed between depression bar 58 and housing 10.In addition, to arrange below measure sensing mechanism 59 along axis 18 at depression bar 58, this measurement sensing mechanism receives the axially-movable implemented by depression bar 58 and converts measuring-signal to.At this, depression bar 58 is born pressure from pressure chamber 24 and to be transmitted to by compensating body 4 along the power path 60 of inner side by pressure measures sensing mechanism 59.In addition, described depression bar 58 is provided with fluorine rubber seal element 5 and is connected on preheat curent circuit 3, and this preheat curent circuit is to depression bar 58 supply of electrical energy that can be configured to economizer bank.In addition, comprise sensor diaphragm 20 by the combustion chamber pressure sensor of Fig. 3, this sensor diaphragm is contained in the cavity 22 between housing 10 and depression bar 58.This sensor diaphragm 20 substantially Z-shaped ground constructs and is resisted against on depression bar 58 with the end in the face of firing chamber.Sensor diaphragm 20 is to be resisted against back to the end of firing chamber on the cover 12 of the inner side of housing 10.Sensor diaphragm is being resisted against on sensor housing 6 back to the end of firing chamber.In addition, housing 10 is configured to cone 16 in the end in the face of firing chamber.Sensor diaphragm 20 is connected with housing 10, sensor housing 6 and depression bar 58 by means of seal welding portion 63.In the seal welding portion 63 sensor diaphragm 20 and depression bar 58 linked together, the pressure born by depression bar 58 is divided into the power path of inner side and the power path 60,61 in outside.The pressure component conducted along the power path 61 in outside extends towards fixture 2, and this fixture is arranged in along axis 18 and measures after sensing mechanism 59.In addition, the power path 61 in outside is in the branch of place of seal welding portion 63 sensor diaphragm 20 and housing 10 coupled together.At this, the power 62 absorbed by housing 10 is from power path 61 top set in outside.At combustion chamber pressure sensor run duration, the surface 27 of sensor diaphragm 20 is directly exposed under the temperature of pressure chamber 24 and pressure effect.Alternatively also depression bar 58 can be configured to economizer bank.
By Fig. 4 show there is shown combustion chamber pressure sensor partly cut open figure, this combustion chamber pressure sensor comprises sensor diaphragm in it is by the first embodiment of the present invention.
Fig. 4 shows, and the housing 10 of combustion chamber pressure sensor constructs relative to its axisymmetrical.The cover of the housing 10 of combustion chamber pressure sensor is provided with Reference numeral 12.This housing 10 constructs with housing wall thickness 14.This housing 10 comprises cone 16 and sensor diaphragm 20.Cavity 22 is separated with pressure chamber 24 by this sensor diaphragm 20, has pressure to be measured in this inside, pressure chamber.
The sensing mechanism be placed in the cavity 22 of combustion chamber pressure sensor is such as the sensing mechanism of piezoelectricity, and this sensing mechanism converts pressure signal to electric signal.
The sensor diaphragm 20 proposed by the present invention comprises compression face, also with reference to the position 27 in Fig. 5.
As known from by the diagram of Fig. 4, described sensor diaphragm 20 be substantially embodied as Z-shaped and perception is present in the pressure in the firing chamber of internal combustion engine.Guarantee that sensor diaphragm 20 bears the possible load of the pressure alteration for the high level of section temperature caused by each load conversion in serviceable life several hundred million for this reason, and can not break down.
Relative to the pressure existed in pressure chamber 24, described cavity 22 is sealed by means of sensor diaphragm 20, wherein guarantee that sensor diaphragm 20 is enough bending soft, thus the path hindering critically and have pressure signal to be measured can not be exceeded.
The section of sensor diaphragm in its first enforcement flexible program illustrated in the assembled state Fig. 4 can be known from the diagram by Fig. 5.
Show by the diagram of Fig. 5, described sensor diaphragm 20 is configured to Z-shaped and constructs relative to its axisymmetrical.This diaphragm cover Reference numeral 26 represents.The mechanical property of the effect length sensor diaphragm 20 of diaphragm cover 26 and its bending flexibility (Biegeschlaffheit).The length of diaphragm cover 26 is preferably between 0mm to 2mm.
Know from by the cut-open view of Fig. 5, the sensor diaphragm 20 proposed by the present invention constructs with the first wall thickness 28 in its first enforcement flexible program in the region that it limits cavity 22.As known further from by the view of Fig. 5, the wall thickness of described sensor diaphragm 20 adopts different values under portion's section 30.Direction towards pressure chamber 24 is seen in the outlet of portion's section 30, and the first steering position 32 is positioned in the interior mask surface 46 of sensor diaphragm 20.This sensor diaphragm 20 has the first wall thickness 28 in the region on the cover 12 being resisted against combustion chamber pressure sensor 10, and this first wall thickness is between 0.2mm to 1.0mm.At the first steering position 32 place-material of radius-described sensor diaphragm 20 that is configured in interior mask surface 46 in by the diagram of Fig. 4 at this adopts the second wall thickness 34.This second wall thickness 34 is in the size class between 0.15mm to 0.4mm.The compression face 27 of sensor diaphragm 20 is connected on the first steering position 32, and the axis of symmetry 18 that this compression face is substantially perpendicular to sensor diaphragm 20 is directed.At the second steering position 38 place, described sensor diaphragm 20 has diameter sudden change and is transitioned in the region 50 of contraction.At the second steering position 38 place, the material of described sensor diaphragm 20 have equally reduction, be the 3rd wall thickness 40 reduced here.Second wall thickness 34 of described reduction and the 3rd wall thickness 40 reduced can be in identical, scope namely between 0.15mm to 0.4mm; But also there is such possibility, namely described two reduce wall thickness 34 in other words 40 be configured to each other different.In addition, sensor diaphragm 20 at the thickness at compression face 27 place preferably between 0.2mm to 0.4mm.
In addition, know from by the view of Fig. 5, described two steering positions 32 and 38 are arranged with radial spacing 42 each other, and at described two steering position places, the sensor diaphragm proposed by the present invention has favourable weakness.This means, described two steering positions 32,38 are used as " hinge ", the wherein region 27 of the pressurized of sensor diaphragm 20 not distortion between two steering positions 32,38.Maximize by making the radial spacing 42 between the first steering position 32 and the second steering position 38 and can realize in an advantageous manner, the diaphragm design of described sensor diaphragm 20 has required bending flexibility, thus can not exceed the path hindering critically and have pressure signal to be measured.Described bending flexibility is also supported by thick the minimizing of area inner wall of the steering position 32 and 38 of sensor diaphragm compression face 27 in other words except maximizing radial spacing 42.In addition, there is the radial spacing 42 of 0.75mm to 1.25mm size in reference axis 18 between steering position 32 and 38.
In Figure 5 with shown in section, sensor diaphragm 20 such as trying to achieve the chamber pressure at combustion chamber pressure sensor place is preferably made up of the material of high strength, especially steel 1.4542.The sealing of the cavity 22 of sealing, the namely combustion chamber pressure sensor of usual sensor inner chamber is by sensor diaphragm 20 itself and realize with the seal welding portion of the sealing cone shell of the heater plug in other words of combustion chamber pressure sensor.
By Fig. 6 show there is shown by the present invention propose sensor diaphragm in the assembled state second implement flexible program.
Can know from by the view of Fig. 6, in this enforcement flexible program of combustion chamber pressure sensor, the cavity 22 being wherein mounted with the measurement sensing mechanism of responsive piezoelectricity is separated with the pressure chamber 24 being loaded with chamber pressure by the sensor diaphragm 20 of Z-shaped.Know, in this sensor diaphragm 20 being configured to Z-shaped, there are two steering positions 32 and 38 equally from by the accompanying drawing of Fig. 5.Substantially limit the compression face 27 of pressure chamber 24 to extend between described two steering positions 32 and 38, in described two steering positions, the first steering position 32 is radially positioned in outside and inside the second steering position 38 is radially positioned in.Know from by the view of Fig. 5, the sensor diaphragm 20 proposed by the present invention in Figure 5 shown in second implement that the wall thickness that has of flexible program is transitioned into reduction below portion's section (Absatz) 30 substantially keep unified wall thickness 56.As further illustrated in fig. 5, be connected to control band 50(see the diagram by Fig. 7) on extension 52 be connected on depression bar 58.
Fig. 7 shows the cut-open view by the second shown in the assembled state in Figure 5 enforcement flexible program of the sensor diaphragm of the present invention's proposition.
As shown in Figure 7 and also know from Fig. 5, the wall thickness of described sensor diaphragm 20 below portion's section 30 adopts the wall thickness 56 of substantially unified reduction.In the region of the diameter transition section 58 of sensor diaphragm 20, this sensor diaphragm 20 tapers in the region 50 of contraction, in described diameter transition section, the diameter of sensor diaphragm 20 is transitioned into and is positioned on the second steering position 38 of radial outside from the first steering position 32.The region 50 of shrinking is extension 52.This extension 52 has several millimeters, such as preferred 2mm.Thermal shock effect can be made to minimize by this extension 52, sensor diaphragm 20 is in operation and is exposed under this thermal shock effect.At this, described extension provides the region can bearing the thermal expansion caused due to thermal shock.At this, sensor diaphragm 20 due to thermal shock occur thermal expansion sensor diaphragm 20 in the face of firing chamber side and be different within the short time on the side of firing chamber.
Can make to act in this region by the sensor diaphragm of the present invention's proposition by the extension 52 arranged in the region 50 of shrinking, namely sidesway, this makes thermal shock effect significantly reduce.The extension 52 being arranged in the region 50 of contraction allows thermal shock effect to be reduced to 0.54 bar.In addition, other of the length of this extension 52 and sensor diaphragm 20 measure reciprocation ground affects the effect of thermal shock to the measuring accuracy of combustion chamber pressure sensor.This amount can be the position of knuckle radius 54 and/or seal welding connecting portion.Can the thermal shock effect optimized further while contracted length and only also have 0.3 bar shortened by the flexible program of the mutual coordination of the length of extension 52 in the region 50 of shrinking and knuckle radius 54, that is while shortening extension 52, realize this optimization.
The salient point of the sensor diaphragm proposed by the present invention in two enforcement flexible programs described by Fig. 3 to 7 is, it not only shields relative to the cavity 22 of high pressure to the survey sensor mechanism wherein accommodating piezo electrics work occurred and seals, and due to its structure at steering position 32 and 38 place with favourable weakness zone, bear several hundred million pressure loads conversion when there is high temperature.According to described two sensor diaphragm 20 proposed by the present invention implementing flexible programs especially true be configured to enough to bend soft, thus do not hinder the path having pressure signal to be measured, this on the one hand by reduce wall thickness owing to implement flexible program by first, second and third wall thickness 34 of reducing in other words 40 or owing to implement flexible program by second, the unified wall thickness 56 that reduces.In addition, implement to be supported in the following manner by the bending flexibility of the sensor diaphragm of the present invention's proposition in flexible program at two described above, namely two represent that steering position 32,38 radial direction of wall thickness weakness of counting is arranged with mutually staggering, and position with radial spacing 42 namely each other.
Described wall thickness, the degree that the second wall thickness 32 namely reduced, the 3rd wall thickness 40 reduced and the unified wall thickness 56 reduced allow with the intensity of member sensor diaphragm in the region of steering position 32,38 minimizes.
Claims (12)
1. for the device for pressure measurement of internal combustion engine, be particularly useful for trying to achieve the chamber pressure with housing (10), sensor diaphragm (19 is accommodate in described housing, 20), pressure chamber (24) and cavity (22) are separated and comprise compression face (27) by described sensor diaphragm, wherein said sensor diaphragm (19, 20) relative to there being housing (10) described in pressure seal to be measured, it is characterized in that, the compression face (27) of described sensor diaphragm (20) is positioned between the first steering position (32) and the second steering position (38), described first steering position and the second steering position are respectively with the wall thickness (34 reduced about first wall thickness (28) of described sensor diaphragm (20), 40) construct.
2., by device for pressure measurement according to claim 1, it is characterized in that, second and third wall thickness (34,40) of described reduction is identical.
3., by device for pressure measurement according to claim 1, it is characterized in that, second and third wall thickness (34,40) of described reduction is different each other.
4., by the device for pressure measurement according to any one of the claims, it is characterized in that, described steering position (32,38) is arranged with radial spacing (42) each other in described sensor diaphragm (20).
5., by the device for pressure measurement according to any one of the claims, it is characterized in that, first wall thickness (28) of described sensor diaphragm (20) is within 1.0mm, preferably between 0.2mm to 1.0mm.
6., by the device for pressure measurement according to any one of the claims, it is characterized in that, second and third wall thickness (34,40) of described reduction is between 0.15mm to 0.4mm.
7., by the device for pressure measurement according to any one of the claims, it is characterized in that, described sensor diaphragm (20) comprises the region (50) of contraction.
8., by the device for pressure measurement according to any one of the claims, it is characterized in that, the region (50) of described contraction has extension (52), and described extension extends from described compression face (27) towards described pressure chamber (24).
9., by the device for pressure measurement according to any one of the claims, it is characterized in that, described extension (52) extends from second steering position (38) of described sensor diaphragm (20).
10. by device for pressure measurement according to any one of the claims, it is characterized in that, described extension (52) be several millimeters, especially 2mm.
11. by the device for pressure measurement according to any one of the claims, it is characterized in that, described extension (52) in order to bear different thermal expansions be configured in described sensor diaphragm (20), in the face of firing chamber side and back on the side of firing chamber, thus reduce thermal shock effect.
12., by the device for pressure measurement according to any one of the claims, is characterized in that, when considering other sizes of described sensor diaphragm (20), described extension (52) has the length for reducing thermal shock effect.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012202058.6 | 2012-02-10 | ||
| DE102012202058A DE102012202058A1 (en) | 2012-02-10 | 2012-02-10 | Diaphragm for combustion chamber pressure sensor |
| PCT/EP2013/051032 WO2013117414A1 (en) | 2012-02-10 | 2013-01-21 | Membrane for combustion chamber pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104246464A true CN104246464A (en) | 2014-12-24 |
| CN104246464B CN104246464B (en) | 2017-02-22 |
Family
ID=47594759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380008787.XA Expired - Fee Related CN104246464B (en) | 2012-02-10 | 2013-01-21 | Membrane for combustion chamber pressure sensor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2812663A1 (en) |
| CN (1) | CN104246464B (en) |
| DE (1) | DE102012202058A1 (en) |
| WO (1) | WO2013117414A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107430041A (en) * | 2015-03-24 | 2017-12-01 | 西铁城精密器件株式会社 | Combustion pressure sensor |
| CN107810401A (en) * | 2015-04-29 | 2018-03-16 | 法国大陆汽车公司 | The sensor of the leading pressure in cylinder for measuring motor vehicles |
| CN109416292A (en) * | 2016-07-09 | 2019-03-01 | 日本特殊陶业株式会社 | Pressure sensor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6511363B2 (en) | 2014-08-27 | 2019-05-15 | 日本特殊陶業株式会社 | Pressure sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3857287A (en) * | 1972-05-08 | 1974-12-31 | Kistler Instrumente Ag | Pressure transducers |
| US5513534A (en) * | 1993-01-13 | 1996-05-07 | K.K. Holding Ag | Pressure transducer compensated for thermal shock implementing bridge girder parallelogram type diaphragm structure |
| US20060090544A1 (en) * | 2004-11-02 | 2006-05-04 | Denso Corporation | Combustion chamber pressure sensor equipped with damper body for attenuating transmitted engine vibration |
| CN1904348A (en) * | 2005-07-27 | 2007-01-31 | 罗伯特·博世有限公司 | Device for detecting combustion chamber pressure of internal-combustion engine |
| DE102006041124A1 (en) * | 2006-09-01 | 2008-03-27 | Beru Ag | Glow plug for diesel engine, has coil fixedly connected with connector at point that is spaced from heating rod, where coil is connected with glow plug body in region of connector if necessary |
| US20100037698A1 (en) * | 2006-12-05 | 2010-02-18 | Christoph Kern | Pressure-measuring device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT394112B (en) * | 1989-03-30 | 1992-02-10 | Avl Verbrennungskraft Messtech | PRESSURE SENSOR |
| DE102007049971A1 (en) | 2007-10-18 | 2009-04-23 | Robert Bosch Gmbh | glow plug |
| FR2949558B1 (en) * | 2009-09-01 | 2012-04-20 | Continental Automotive France | DEVICE FOR MEASURING PRESSURES IN A COMBUSTION CHAMBER |
-
2012
- 2012-02-10 DE DE102012202058A patent/DE102012202058A1/en not_active Withdrawn
-
2013
- 2013-01-21 WO PCT/EP2013/051032 patent/WO2013117414A1/en active Application Filing
- 2013-01-21 CN CN201380008787.XA patent/CN104246464B/en not_active Expired - Fee Related
- 2013-01-21 EP EP13700747.2A patent/EP2812663A1/en not_active Ceased
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| US3857287A (en) * | 1972-05-08 | 1974-12-31 | Kistler Instrumente Ag | Pressure transducers |
| US5513534A (en) * | 1993-01-13 | 1996-05-07 | K.K. Holding Ag | Pressure transducer compensated for thermal shock implementing bridge girder parallelogram type diaphragm structure |
| US20060090544A1 (en) * | 2004-11-02 | 2006-05-04 | Denso Corporation | Combustion chamber pressure sensor equipped with damper body for attenuating transmitted engine vibration |
| CN1904348A (en) * | 2005-07-27 | 2007-01-31 | 罗伯特·博世有限公司 | Device for detecting combustion chamber pressure of internal-combustion engine |
| DE102006041124A1 (en) * | 2006-09-01 | 2008-03-27 | Beru Ag | Glow plug for diesel engine, has coil fixedly connected with connector at point that is spaced from heating rod, where coil is connected with glow plug body in region of connector if necessary |
| US20100037698A1 (en) * | 2006-12-05 | 2010-02-18 | Christoph Kern | Pressure-measuring device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107430041A (en) * | 2015-03-24 | 2017-12-01 | 西铁城精密器件株式会社 | Combustion pressure sensor |
| CN107810401A (en) * | 2015-04-29 | 2018-03-16 | 法国大陆汽车公司 | The sensor of the leading pressure in cylinder for measuring motor vehicles |
| US10551269B2 (en) | 2015-04-29 | 2020-02-04 | Continental Automotive France | Sensor for measuring the pressure prevailing in a motor vehicle cylinder head |
| CN107810401B (en) * | 2015-04-29 | 2020-04-14 | 法国大陆汽车公司 | Sensor for measuring the pressure prevailing in a cylinder of a motor vehicle |
| CN109416292A (en) * | 2016-07-09 | 2019-03-01 | 日本特殊陶业株式会社 | Pressure sensor |
| CN109416292B (en) * | 2016-07-09 | 2020-08-11 | 日本特殊陶业株式会社 | Pressure sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013117414A1 (en) | 2013-08-15 |
| DE102012202058A1 (en) | 2013-08-14 |
| CN104246464B (en) | 2017-02-22 |
| EP2812663A1 (en) | 2014-12-17 |
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