CN104246464B - Membrane for combustion chamber pressure sensor - Google Patents
Membrane for combustion chamber pressure sensor Download PDFInfo
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- CN104246464B CN104246464B CN201380008787.XA CN201380008787A CN104246464B CN 104246464 B CN104246464 B CN 104246464B CN 201380008787 A CN201380008787 A CN 201380008787A CN 104246464 B CN104246464 B CN 104246464B
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- pressure
- sensor diaphragm
- wall thickness
- diaphragm
- pressure gauge
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 239000012528 membrane Substances 0.000 title abstract description 9
- 230000000694 effects Effects 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000035939 shock Effects 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000237942 Conidae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 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
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 235000008434 ginseng Nutrition 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
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- G01L19/06—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
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 is related to a kind of pressure gauge.In this pressure gauge is used for being arranged in
In the combustor of combustion engine.This pressure gauge has housing, force transmission element and pressure transducer, and this force transmission element exists
Partly stretch out from housing at the opening of room side of housing.Described pressure transducer is arranged in the inner chamber of housing.Here, pressure
Force transducer and force transmission element are in during effect is connected.In addition be provided with diaphragm, this diaphragm with respect to room side opening to it
In be disposed with pressure transducer the inner chamber of housing sealed.The diaphragm being preferably configured as metallic membrane has power transmission unit
Part, this force transmission element is along the axial orientation of force transmission element.Additionally, pressure transducer by means of diaphragm power pass segment with
Force transmission element is in effect connection.Thus carry out at least a portion to diaphragm by thermally-induced length change to compensate, this
Plant length change for example to be caused by hot fuel gas and the pressure measxurement by means of pressure transducer can be caused periodically
Impact.
DE 10 2,007 049 971 A1 is related to a kind of heater plug.Heater plug is used in the chamber be arranged in internal combustion engine.In advance
Heat plug has housing, bar-shaped heating element heater and pressure transducer, and described heating element heater partly stretches out from housing, and institute
State pressure transducer to be arranged in the inner chamber of housing.Here, pressure transducer one side is in effect with bar-shaped heating element heater
In connection, thus the loading to heating element heater that detection is caused due to the pressure being present in chamber is so that it is determined that be present in chamber
In pressure.Additionally, pressure transducer another aspect is supported on the retaining element being connected with housing.Spring diaphragm is with respect to interior
The chamber of combustion engine seals to the inner chamber of housing.Here, spring diaphragm is designed to the spring diaphragm of S-shaped.By this design
Scheme enables in particular to realize pressure compensated setting, thus improving the tonometric precision by means of pressure transducer.
Diaphragm is needed with respect to combustor, the inner chamber of sensor to be sealed inside combustion chamber pressure sensor.Ooze
The medium entering especially destroys sensor assembly and electronics device due to the chemical characteristic of its temperature and its corrosion within the time the shortest
The component of part.Meanwhile, described diaphragm agree during operating sensor loaded.The pressure that substantially has belonging to described load becomes
The repeated loading changed（The load change of each service life several hundred million）And the high level of mean temperature.
Content of the invention
Propose by the present invention, be so designed that be made up of the metal material, film being used in combustion chamber pressure sensor
Piece such that it is able to the minimum of the wall thickness of diaphragm be made up of metal material described in realizing, wherein especially in pressurized diaphragm watch
The minimum of wall thickness is realized in transitional region between face and adjacent region.Be furthermore possible to by make pressurized membrane surface and
The maximization of the spacing between this transitional region realizing so that bending softness enough by diaphragm proposed by the present invention, thus not surpassing
Cross critically to hinder and have the path of pressure signal to be measured.Described diaphragm hinders the path having pressure signal to be measured, its
Mode is that described diaphragm receives the part having pressure signal to be measured and is not delivered to measure sensing mechanism, such as piezoelectricity
Sensing mechanism on.On iff the pressure signal transmission that will reduce to measurement sensing mechanism, then the measurement of sensing mechanism
Result carries inexactness due to being superimposed with signal noise.In the feelings critically hindering the path having pressure signal to be measured
It is no longer able in condition reliably compensate the inexactness causing due to signal noise.Described bending flexibility is real by the following method
Existing, so that the radial spacing between two steering positions maximizes（The diameter of about 7mm and the diameter of about 4.5mm）.Separately
On the one hand the wall thickness in turn-around zone is minimized, as the intensity of component allows.Described wall thickness is for example in outside
Turn-around zone in be only a few tenths of mm, especially 0.2mm, and described wall thickness is in internally positioned steering in other words radius
Can be 0.2 to 0.35mm.Achieve a kind of " hinge by this two steering positions being previously mentioned（Schamier）", diaphragm encloses
Around the distortion of this hinge.
Advantageously, be especially suitable in combustion chamber pressure sensor, by diaphragm proposed by the present invention, there is minimum
Thermal shock effect, the certainty of measurement of combustion chamber pressure sensor can be reduced by this thermal shock effect.This is in the following manner
Realize, that is, the region shunk prolongedly constructs the turning point in outside, so that described diaphragm can act in this region
（arbeiten）And sidesway（seitlich ausweichen）.The sidesway of the diaphragm being made up of metal material significantly reduces heat
Shock effect.So, the region for example making contraction extends about 2mm effect highly significant in terms of thermal shock effect.?
In other identical geometries, the prolongation further in the region of contraction can cause the reduction further of thermal shock effect, but
Requirement and thermal shock effect phase with regard to sensor length are resisted.
Additionally, the sidesway of diaphragm is affected by the position of the other sizes of diaphragm, especially knuckle radius and sealing welding.
When the prolongation in the region shunk being optimized in the case of the parameter considering other influences diaphragm sidesway, can be excellent further
Change design in terms of thermal shock for the diaphragm.
Additionally, providing, by the combustion chamber pressure sensor of the present invention, the scheme making the share of pressure signal minimize, should
Pressure signal is not delivered to measurement sensing mechanism from diaphragm.Described measurement sensing mechanism is operationally in the pressure being received
High level on work, thus more easily discriminate between pressure change and signal noise.Combustion chamber pressure sensor tool by the present invention
There is the certainty of measurement of improvement.
Brief description
Describe the present invention below according to accompanying drawing in detail.
Accompanying drawing illustrates：
Fig. 1 and 2 is the schematic diagram of the sensor diaphragm being used up to now,
Fig. 3 is the sectional side elevation of the combustion chamber pressure sensor by the present invention,
Fig. 4 is that have the chamber pressure sensing by sensor diaphragm proposed by the present invention by the first enforcement flexible program
The schematic semi-cutaway of device,
Fig. 5 is the sectional view by sensor diaphragm proposed by the present invention of the first enforcement flexible program,
Fig. 6 is the second enforcement flexible program in the assembled state by sensor diaphragm proposed by the present invention, and
Fig. 7 is the sectional view by sensor diaphragm proposed by the present invention in its second embodiment.
Specific embodiment
Fig. 1 and 2 shows the sensor diaphragm by prior art.
Can know from Fig. 1 and 2, sensor diaphragm 19 symmetrically constructs and has film with respect to its axis of symmetry 18
Piece cover 26.Can know from the sectional view by Fig. 2, by the sensor diaphragm 19 of prior art, structure be carried out with the first wall thickness 28
Make.
Fig. 3 shows a kind of sectional side elevation of embodiment of the combustion chamber pressure sensor by the present invention.This burning chamber pressure
Force transducer includes housing 10, contains the depression bar 58 in the face of pressure chamber 24 in this housing.This depression bar 58 bears from pressure
The pressure of the room 24 and effect of pressure is converted into moving along axis 18.Construct sky between depression bar 58 and housing 10
Chamber 22.Additionally, arranging measurement sensing mechanism 59 along axis 18 below in depression bar 58, this measurement sensing mechanism receives by depression bar
58 enforcement axially-movables and be converted into measurement signal.Here, depression bar 58 bears the pressure from pressure chamber 24 and will press
Power is transmitted to measurement sensing mechanism 59 along the power path 60 of inner side by compensating body 4.Additionally, described depression bar 58 is provided with fluorubber
Sealing member 5 and be connected to preheating current circuit 3 on, this preheating current circuit supplies to the depression bar 58 that can be configured to economizer bank
Electric energy.Additionally, including sensor diaphragm 20 by the combustion chamber pressure sensor of Fig. 3, this sensor diaphragm is contained in housing 10 He
In cavity 22 between depression bar 58.This sensor diaphragm 20 substantially Z-shaped ground construction and with the face of the end of combustor against
On depression bar 58.Sensor diaphragm 20 is resisted against with the end back to combustor 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 combustor.Additionally, housing 10 is in the face of the end structure of combustor
Make as cone 16.Sensor diaphragm 20 is connected with housing 10, sensor housing 6 and depression bar 58 by means of seal weld socket part 63.
In the seal weld socket part 63 that sensor diaphragm 20 is linked together with depression bar 58, inner side is divided into by the pressure that depression bar 58 bears
Power path and outside power path 60,61.Pressure component along power path 61 conduction in outside extends towards fixture 2, should
Fixture is arranged in after measurement sensing mechanism 59 along axis 18.Additionally, the power path 61 in outside is by sensor diaphragm 20
Branch at the seal weld socket part 63 coupling together with housing 10.Here, the power 62 being absorbed by housing 10 is from the power path 61 in outside
Top set.In combustion chamber pressure sensor run duration, the surface 27 of sensor diaphragm 20 is directly exposed to from pressure chamber 24
Temperature and pressure effect under.Alternatively also depression bar 58 can be configured to economizer bank.
Show the semi-cutaway of combustion chamber pressure sensor in the diagram by Fig. 4, this combustion chamber pressure sensor is at it
Comprise sensor diaphragm by the first embodiment of the present invention.
Fig. 4 shows, the housing 10 of combustion chamber pressure sensor constructs with respect to its axisymmetrical.Chamber pressure passes
The cover of the housing 10 of sensor is provided with reference 12.This housing 10 is constructed with housing wall thickness 14.This housing 10 includes cone 16
And sensor diaphragm 20.Cavity 22 is separated by this sensor diaphragm 20 with pressure chamber 24, there are inside this pressure chamber
Pressure to be measured.
The sensing mechanism being placed in the cavity 22 of combustion chamber pressure sensor is, for example, the sensing mechanism of piezoelectricity, this sensing
Pressure signal is converted into the signal of telecommunication by mechanism.
Include compression face by sensor diaphragm 20 proposed by the present invention, also referring to the position 27 in Fig. 5.
As known from the diagram by Fig. 4, that described sensor diaphragm 20 is substantially implemented as Z-shaped and perceive and be present in
Pressure in the combustor of internal combustion engine.Guarantee that for this sensor diaphragm 20 bears that each makes for the high level of section temperature
With the possible load of the caused pressure alteration of life-span several hundred million load conversion, without breaking down.
Described cavity 22 is sealed with respect to pressure present in pressure chamber 24 by means of sensor diaphragm 20, wherein
Guarantee that sensor diaphragm 20 bends softness enough, have the path of pressure signal to be measured thus not exceeding and critically hindering.
The sensor diaphragm illustrating in the assembled state Fig. 4 can be known in its first reality from the diagram by Fig. 5
Apply the section in flexible program.
Show by the diagram of Fig. 5, described sensor diaphragm 20 is configured to Z-shaped and with respect to its axisymmetrical ground structure
Make.This diaphragm cover reference 26 represents.The mechanical property of effect length sensor diaphragm 20 of diaphragm cover 26 and
It bends flexibility（Biegeschlaffheit）.The length of diaphragm cover 26 is preferably between 0mm to 2mm.
Know from the sectional view by Fig. 5, by sensor diaphragm 20 proposed by the present invention in its first enforcement flexible program
In its limit cavity 22 region in constructed with the first wall thickness 28.As known further from the view by Fig. 5,
The wall thickness of described sensor diaphragm 20 adopts different values under section 30.Going out in section 30 is seen in direction towards pressure chamber 24
In mouthful, the first steering position 32 is located in the interior mask surface 46 of sensor diaphragm 20.This sensor diaphragm 20 is being resisted against combustor
There is in region on the cover 12 of pressure transducer 10 the first wall thickness 28, this first wall thickness is between 0.2mm to 1.0mm.?
At first steering position 32-here is configured to the radius-described sensor diaphragm 20 in interior mask surface 46 in the diagram by Fig. 4
Material adopts the second wall thickness 34.This second wall thickness 34 is in the size class between 0.15mm to 0.4mm.Sensor diaphragm 20
Compression face 27 be connected on the first steering position 32, this compression face is substantially perpendicular to the axis of symmetry 18 of sensor diaphragm 20
Orientation.At the second steering position 38, described sensor diaphragm 20 has diameter and is mutated and is transitioned in the region 50 of contraction.
At the second steering position 38, the material of described sensor diaphragm 20 equally has the 3rd wall thickness reduction, being reduction here
40.Second wall thickness 34 of described reduction and the 3rd wall thickness 40 reducing can be identical, namely 0.15mm to 0.4mm it
Between in the range of；But there is also such probability, i.e. the wall thickness 34 of described two reductions 40 is configured in other words each other
Different.Additionally, thickness at compression face 27 for the sensor diaphragm 20 is preferably between 0.2mm to 0.4mm.
Additionally, knowing from the view by Fig. 5, described two steering positions 32 and 38 are each other with radial spacing 42 cloth
Put, at described two steering positions, by sensor diaphragm proposed by the present invention, there is favourable weakness.It means that institute
State two steering positions 32,38 and be used as " hinge ", wherein the pressurized region 27 of sensor diaphragm 20 is not in two steering positions
32nd, distort between 38.Can by making the radial spacing 42 between the first steering position 32 and the second steering position 38 maximize
Realize in an advantageous manner, the diaphragm design of described sensor diaphragm 20 has required bending flexibility, thus not super
Cross critically to hinder and have the path of pressure signal to be measured.Described bending flexibility except maximize radial spacing 42 also by
The minimum that the area inner wall of the steering position 32 and 38 of sensor diaphragm compression face 27 in other words is thick is supported.Additionally, ginseng
According to axis 18, between steering position 32 and 38, there is the radial spacing 42 of 0.75mm to 1.25mm size.
In Figure 5 with shown in section, be for example used for trying to achieve the sensing of chamber pressure at combustion chamber pressure sensor
Device diaphragm 20 is preferably by the material of high intensity, especially steel 1.4542 is made.The generally sealing of sensor inner chamber, namely combustor
It is in itself and pre- in other words with combustion chamber pressure sensor that sensor diaphragm 20 is passed through in the sealing of the cavity 22 of pressure transducer
The seal weld socket part of the sealing cone shell of heat plug is realizing.
The second reality in the assembled state by sensor diaphragm proposed by the present invention is shown in the diagram by Fig. 6
Apply flexible program.
Can know from the view by Fig. 6, in this enforcement flexible program of combustion chamber pressure sensor, wherein pacify
Be equipped with the piezoelectricity of sensitivity measurement sensing mechanism cavity 22 by the sensor diaphragm 20 of Z-shaped be loaded with chamber pressure
Pressure chamber 24 separates.Know from the accompanying drawing by Fig. 5, the sensor diaphragm 20 that here is configured to Z-shaped equally has two turns
To position 32 and 38.The compression face 27 substantially limiting pressure chamber 24 extends between described two steering positions 32 and 38,
In described two steering positions, the first steering position 32 is radially positioned in outside and in the second steering position 38 is radially positioned in
Side.Know from the view by Fig. 5, by the second shown in Figure 5 enforcement modification of sensor diaphragm 20 proposed by the present invention
The wall thickness that scheme has is in section（Absatz）Be transitioned into reduction below 30 is kept substantially unified wall thickness 56.As Fig. 5
It is further illustrated, be connected to adjustment region 50（Referring to the diagram by Fig. 7）On extension 52 be connected on depression bar 58.
Fig. 7 shows second reality shown in the assembled state in Figure 5 by sensor diaphragm proposed by the present invention
Apply the sectional view of flexible program.
Know from Fig. 5 as shown in Figure 7 and also, wall thickness below section 30 for the described sensor diaphragm 20 is using big
The wall thickness 56 of the reduction of the decorum one.In the region of the diameter transition section 58 of sensor diaphragm 20, this sensor diaphragm 20 is gradually
Taper in the region 50 of contraction, in described diameter transition section, the diameter of sensor diaphragm 20 is opened from the first steering position 32
Begin to be transitioned on the second steering position 38 of radial outside.The region 50 shunk is extension 52.This extension 52 has several
Millimeter, such as preferably 2mm.Enable to thermal shock effect by this extension 52 to minimize, sensor diaphragm 20 is being run
In be exposed under this thermal shock effect.Here, described extension provides, can to bear the heat causing due to thermal shock swollen
Swollen region.Here, the thermal expansion due to thermal shock appearance of sensor diaphragm 20 is in combustor faced by sensor diaphragm 20
Side and be different back within the short time on the side of combustor.
Can be made by sensor diaphragm proposed by the present invention at this by the extension 52 of setting in the region 50 shunk
Effect, namely sidesway in region, this makes thermal shock effect be substantially reduced.The extension 52 being located in the region 50 shunk is permitted
Permitted thermal shock effect and be reduced to 0.54 bar.Additionally, the other amounts reciprocal action of the length of this extension 52 and sensor diaphragm 20
The effect of the ground impact certainty of measurement to combustion chamber pressure sensor for the thermal shock.This amount can be knuckle radius 54 and/or close
The position of soldering and sealing connection section.By extension 52 shrink region 50 in length and knuckle radius 54 mutually coordinated
Flexible program can shorten contracted length while optimize further only also have 0.3 bar thermal shock effect, that is,
Say and realize this optimization while shortening extension 52.
Prominent by sensor diaphragm proposed by the present invention in two enforcement flexible programs according to described by Fig. 3 is to 7
Part be, its not only with respect to occur high pressure to wherein accommodate piezo electrics work measurement sensor mechanism sky
Chamber 22 is shielded and is sealed, and because it has the construction of favourable weakness zone at steering position 32 and 38, is going out
Several hundred million pressure load conversion are born during existing high temperature.According to two described enforcement flexible programs by sensing proposed by the present invention
Device diaphragm 20 is especially true to be configured to bend softness enough, thus not hindering the path having pressure signal to be measured, this
Aspect pass through reduce wall thickness owing to by first enforcement flexible program, reduce second and third wall thickness 34 in other words 40 or
Owing to by the second enforcement flexible program, reduction unified wall thickness 56.Additionally, described above two enforcement modifications
Supported in the following manner by the bending flexibility of sensor diaphragm proposed by the present invention in scheme, that is, two represent counting
The steering position 32,38 of wall thickness weakness radially arrange with mutually staggering, that is, carried out with radial spacing 42 each other fixed
Position.
Described wall thickness, that is, the second wall thickness 32 reducing, the 3rd wall thickness 40 reducing and the unified wall thickness reducing
56 degree being allowed with the intensity of member sensor diaphragm in the region of steering position 32,38 are minimized.
Claims (12)
1. it is used for the pressure gauge of internal combustion engine, be used for trying to achieve chamber pressure, including housing（10）With for measuring pressure
Sensing mechanism（59）, this sensing mechanism is contained in described housing（10）Cavity（22）In, in described cavity（22）Middle receiving
Sensor diaphragm（20）, described sensor diaphragm is by cavity（22）With pressure chamber（24）Separate, and make this cavity
（22）With respect to there being pressure seal to be measured, wherein, described sensor diaphragm（20）Z-shaped ground construction in cross-section, and
First steering position（32）With the second steering position（38）Between include compression face（27）, this compression face is substantially perpendicular to sensing
Device diaphragm（20）The axis of symmetry（18）, and in the first and second steering positions（32、38）Respectively in connection with substantially along right
Claim axis（18）The transitional region of direction, wherein, sensor diaphragm（20）There is the first wall thickness（28）, the second wall thickness（34）With
Three wall thickness（40）, with the first steering position（32）Adjacent transitional region is with respect to the first wall thickness（28）The second wall thickness reducing
（34）Constructed, with the second steering position（38）Adjacent transitional region is with respect to the first wall thickness（28）The 3rd wall reducing
Thick（40）Constructed,
It is characterized in that,
Sensor diaphragm（20）The end back to combustor be resisted against housing（10）Inner side cover（12）；
Sensor diaphragm（20）In the 3rd wall thickness（40）Region in and sensing mechanism（59）Radially connect, the first steering position
（32）With the second steering position（38）Each other with radial spacing（42）It is arranged in sensor diaphragm（20）On, this radial spacing energy
Realization makes sensor diaphragm（20）There is required bending flexibility, thus not exceed critically hinder have to be measured
The path of pressure signal.
2. the pressure gauge as described in claim 1 is it is characterised in that second and third wall thickness of described reduction（34、
40）It is identical.
3. the pressure gauge as described in claim 1 is it is characterised in that second and third wall thickness of described reduction（34、
40）It is different each other.
4. the pressure gauge as described in claim 1 is it is characterised in that described sensor diaphragm（20）The first wall thickness
（28）Within 1.0mm.
5. the pressure gauge as described in claim 1 is it is characterised in that second and third wall thickness of described reduction（34、
40）Between 0.15mm to 0.4mm.
6. the pressure gauge as described in claim 1 is it is characterised in that described sensor diaphragm（20）Including the area shunk
Domain（50）.
7. the pressure gauge as described in claim 6 is it is characterised in that the region of described contraction（50）There is extension
（52）, described extension is from described compression face（27）Towards described pressure chamber（24）Extend.
8. the pressure gauge as described in claim 7 is it is characterised in that described extension（52）From described sensor diaphragm
（20）The second steering position（38）Start to extend.
9. the pressure gauge as described in claim 7 is it is characterised in that described extension（52）In order to bear different heat
Expand and construct in described sensor diaphragm（20）, in the face of combustor side and back on the side of combustor, thus
Reduce thermal shock effect.
10. the pressure gauge as described in claim 7 is it is characterised in that considering described sensor diaphragm（20）Its
In the case of his size, described extension（52）There is the length for reducing thermal shock effect.
11. pressure gauges as described in claim 4 are it is characterised in that described sensor diaphragm（20）The first wall thickness
（28）Between 0.2mm to 1.0mm.
12. pressure gauges as described in claim 7 are it is characterised in that described extension（52）For 2mm.
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 CN104246464A (en) | 2014-12-24 |
| CN104246464B true 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) |
Families Citing this family (4)
| 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 |
| EP3276325A4 (en) * | 2015-03-24 | 2018-11-14 | Citizen Finedevice Co., Ltd. | Combustion pressure sensor |
| FR3035713B1 (en) * | 2015-04-29 | 2018-08-17 | Continental Automotive France | SENSOR FOR MEASURING PRESSURE REGULATING IN A CYLINDER OF A MOTOR VEHICLE |
| JP6143926B1 (en) * | 2016-07-09 | 2017-06-07 | 日本特殊陶業株式会社 | Pressure sensor |
Citations (4)
| 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 |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT394112B (en) * | 1989-03-30 | 1992-02-10 | Avl Verbrennungskraft Messtech | PRESSURE SENSOR |
| JP4316474B2 (en) * | 2004-11-02 | 2009-08-19 | 株式会社デンソー | Combustion chamber pressure detector |
| DE102006057627A1 (en) | 2006-12-05 | 2008-06-12 | Robert Bosch Gmbh | Pressure measuring device |
| 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
Patent Citations (4)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2812663A1 (en) | 2014-12-17 |
| DE102012202058A1 (en) | 2013-08-14 |
| CN104246464A (en) | 2014-12-24 |
| WO2013117414A1 (en) | 2013-08-15 |
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