CN101231205B - Cylinder pressure measuring device - Google Patents
Cylinder pressure measuring device Download PDFInfo
- Publication number
- CN101231205B CN101231205B CN2008100038376A CN200810003837A CN101231205B CN 101231205 B CN101231205 B CN 101231205B CN 2008100038376 A CN2008100038376 A CN 2008100038376A CN 200810003837 A CN200810003837 A CN 200810003837A CN 101231205 B CN101231205 B CN 101231205B
- Authority
- CN
- China
- Prior art keywords
- supporting sleeve
- cylinder pressure
- pressure measuring
- pull bar
- air cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
- G01L23/18—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 resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
- Testing Of Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a cylinder pressure measuring device for an internal combustion engine, for measuring the pressure outside a combustion chamber of a cylinder of the internal combustion engine, comprising a bearing sleeve (10) which is divided in the axial direction and which can be fastened to a tie rod of the cylinder by means of at least one fastening means in such a way that the bearing sleeve (10) partially surrounds the tie rod, wherein the bearing sleeve (10) is assigned at least one strain gauge strip, and wherein a change in the length of the tie rod caused by the cylinder pressure to be measured causes a change in the length of the bearing sleeve (10) divided in the axial direction and thus a change in the length of the or each strain gauge strip.
Description
Technical field
The present invention relates to a kind of air cylinder pressure measuring device that is used for internal combustion engine.
Background technology
In order to guarantee internal combustion engine, the optimum operation of large-scale diesel engine or gas engine for example requires to adopt measuring technique to measure cylinder pressure in the cylinder of internal-combustion engine, and it for example is used to regulate the firing characteristic of internal combustion engine.Must measure the cylinder pressure in the internal combustion cylinder constantly for this reason.
Disclosed in practice air cylinder pressure measuring device directly or measure the cylinder pressure of cylinder of internal-combustion engine within the firing chamber of cylinder.The air cylinder pressure measuring device of inside, this firing chamber will stand high thermal force and mechanical load.These measurement mechanisms are also owing to the deposition of combustion residue suffers damage in addition.Therefore this causes the air cylinder pressure measuring device in the disclosed in practice firing chamber only to have short serviceable life, and is not suitable for the long constantly working time and measures cylinder pressure reliably.Therefore need a kind of like this air cylinder pressure measuring device.Measure cylinder pressure in the cylinder of internal-combustion engine sustainably by this air cylinder pressure measuring device, and this device can realize again with lower cost, and not require that again the structure to internal combustion engine has change.
Summary of the invention
Therefore according to the problems referred to above, task of the present invention provides a kind of new cylinder device for pressure measurement.
This task is accomplished by a kind of air cylinder pressure measuring device, it is used for the pressure in the firing chamber of firing chamber external pelivimetry cylinder of internal-combustion engine, has in axial direction separated supporting sleeve, this supporting sleeve can so be fixed on the pull bar of cylinder by at least one fixed mechanism, make this supporting sleeve partly surround described pull bar, wherein set at least one strain measurement sheet to supporting sleeve, and wherein the pull bar length variations that is caused by cylinder pressure to be measured causes the length variations at the separated supporting sleeve of axial direction, and and then causes the length variations of this or each strain measurement sheet.Air cylinder pressure measuring device according to the present invention has the supporting sleeve of in axial direction separating.This supporting sleeve can so be fixed on the pull bar of cylinder by at least one fixed mechanism, make supporting sleeve partly surround pull bar, wherein, set at least one strain measurement sheet for this supporting sleeve, and wherein, cause the length variations of the in axial direction separated supporting sleeve of opening by the length variations of the caused pull bar of cylinder pressure to be measured, and therefore cause the length variations of this or each strain measurement sheet.
By air cylinder pressure measuring device according to the present invention, indirectly or outside the firing chamber of cylinder, measure cylinder pressure in the cylinder of internal-combustion engine.Used because the cylinder pressure of cylinder to be monitored produces and the proportional extension of cylinder pressure pull bar for this reason.Because the firing chamber of air cylinder pressure measuring device according to the present invention and cylinder to be monitored directly is not connected, so this measurement mechanism is also without undergoing high thermal force and mechanical load.In addition, the function according to air cylinder pressure measuring device of the present invention does not suffer damage because of the deposition of combustion residue yet.In addition, do not require that internal combustion engine structurally changes yet.Air cylinder pressure measuring device according to the present invention can simply mount and dismount on internal combustion engine.Advantage according to air cylinder pressure measuring device of the present invention is that cost is lower, and long service life.
Description of drawings
By providing advantageous modification of the present invention in appurtenance and the following explanation.By accompanying drawing embodiments of the invention are described in detail, but the present invention is not limited to these embodiment.These accompanying drawings are:
Fig. 1 is according to the supporting sleeve of air cylinder pressure measuring device of the present invention,
Fig. 2 is according to the clamping ring of the fixed mechanism of air cylinder pressure measuring device of the present invention,
Fig. 3 is according to the geosynclinal block of the fixed mechanism of air cylinder pressure measuring device of the present invention,
Fig. 4 is according to the securing member of the fixed mechanism of air cylinder pressure measuring device of the present invention,
Fig. 5 is according to the clamping plate of the fixed mechanism of air cylinder pressure measuring device of the present invention.
The Reference numeral table
10 supporting sleeves
11 axial directions
12 sections
13 sections
14 ends
15 ends
16 clamping rings
17 geosynclinal blocks
18 securing members
19 clamping plates
20 juts
Embodiment
Fig. 1 to Fig. 5 illustrate according to air cylinder pressure measuring device of the present invention preferred embodiment in construction package.Air cylinder pressure measuring device is used for measuring indirectly the cylinder pressure of the cylinder of internal combustion engine outside combustion chamber of air cylinder, wherein, in order to measure cylinder pressure, utilized the proportional extension that makes the pull bar generation owing to the cylinder pressure of cylinder to be monitored.
Air cylinder pressure measuring device according to the present invention has supporting sleeve 10 (see figure 1)s, and wherein supporting sleeve 10 in axial direction just is separated along arrow 11 directions.Preferred supporting sleeve 10 in axial direction is divided into two sections 12 and 13 by cutting apart or separating.Supporting sleeve 10 is axially cut apart, make pull bar installed or the state of having packed under, can install according to air cylinder pressure measuring device of the present invention.
Air cylinder pressure measuring device according to the present invention has two fixed mechanisms, be used for will air cylinder pressure measuring device according to the present invention being fixed on the pull bar of cylinder, exactly be mode like this fix, promptly supporting sleeve 10 is partly around surrounding pull bar in other words.Wherein, two axial end portions, 14,15 places at supporting sleeve 10 are equipped with a fixed mechanism respectively.
Each fixed mechanism comprises clamping ring 16 (see figure 2)s, geosynclinal block 17 (see figure 3)s, securing member 18 (see figure 4)s and clamping plate 19 (see figure 5)s of U-shaped.Each clamping plate 19 is tightened by bolt and corresponding fasteners 18 and geosynclinal block 17, and clamping ring 16 withstands or push down corresponding pull bar with supporting sleeve 10 at last thus.
By using clamping ring 16, even under the very narrow and small situation in space, also air cylinder pressure measuring device can be installed on the pull bar.Determine the surface pressing of supporting sleeve 10 and pull bar by the screw-down torque of bolt.
Each section 12,13 of supporting sleeve 10 has a jut 20 respectively on the end 14,15 in the outside.This jut abuts on the pull bar under installment state.Be configured in the size of the jut 20 on the inside surface of section 12,13 of supporting sleeve 10, and the screw-down torque of bolt has been determined the surface pressing between supporting sleeve 10 and the pull bar.The external diameter that the internal diameter of the jut 20 that forms on the inside surface of these sections in this case, should be fixed the pull bar on it with air cylinder pressure measuring device is suitable.
Supporting sleeve 10 according to air cylinder pressure measuring device of the present invention is equipped with at least one strain measurement sheet.The length variations of the pull bar that is caused by cylinder pressure to be measured changes the length variations of supporting sleeve 10 into, and therefore changes the length variations of this or each strain measurement sheet into.Between the supporting sleeve 10 of pull bar and air cylinder pressure measuring device, exist power to cooperate in view of the above, thus the jut 20 by on the inside surface of supporting sleeve 10, forming, because the power that the length variations of pull bar produces is passed on the supporting sleeve 10.
Select a kind of suitable material for supporting sleeve and can offset fretting corrosion danger between supporting sleeve and the pull bar.Preferred supporting sleeve 10 and will make by identical materials by this supporting sleeve pull bar fixed thereon according to air cylinder pressure measuring device of the present invention.Like this, pull bar reaches identical heat extension with supporting sleeve.In addition, the tension force between pull bar and the supporting sleeve is minimized.
Preferred air cylinder pressure measuring device comprises two strain measurement sheets.They are arranged on the position of diametrically contraposition of supporting sleeve.All set a strain measurement sheet preferably for each section in two sections 13,14 of supporting sleeve 10.Therefore these two strain measurement sheets preferably are connected into Hui Sitong (Wheatstone) electric bridge, with the bending of compensation linkage, and also compensate the bending of supporting sleeve.
Also existing internal combustion engine can be installed additional according to air cylinder pressure measuring device of the present invention.Installation and removal according to air cylinder pressure measuring device of the present invention are carried out on mounted pull bar.Do not require pull bar or internal combustion engine are done change on any structure.
Claims (5)
1. the air cylinder pressure measuring device that is used for internal combustion engine, be used for pressure in the firing chamber of firing chamber external pelivimetry cylinder of internal-combustion engine, has in axial direction separated supporting sleeve (10), this supporting sleeve can so be fixed on the pull bar of cylinder by at least one fixed mechanism, make this supporting sleeve (10) partly surround described pull bar, set at least one strain measurement sheet wherein for supporting sleeve (10), and wherein the pull bar length variations that is caused by cylinder pressure to be measured causes the length variations at the separated supporting sleeve of axial direction (10), and and then causes the length variations of this or each strain measurement sheet.
2. according to the described air cylinder pressure measuring device of claim 1, it is characterized in that supporting sleeve (10) is divided into two sections (12,13) by separation in axial direction.
3. according to claim 1 or 2 described air cylinder pressure measuring devices, it is characterized in that, be equipped with a strain measurement sheet respectively on the position of diametrically contraposition, for supporting sleeve (10), wherein two strain measurement sheets pressed Wheatstone bridge and connected, with the bending of compensation linkage.
4. according to claim 1 or 2 described air cylinder pressure measuring devices, it is characterized in that, the section of supporting sleeve (10) (12,13) has the jut (20) towards inside surface respectively on the end (14,15) in its outside, under the installment state that is installed on the pull bar, the outside surface of described jut roof pressure pull bar.
5. according to claim 1 or 2 described air cylinder pressure measuring devices, it is characterized in that, this air cylinder pressure measuring device can be fixed on the pull bar of cylinder by fixed mechanism, wherein, each fixed mechanism comprises the clamping ring (16) of U-shaped, geosynclinal block (17), securing member (18) and clamping plate (19), wherein, each clamping ring (16) is in the end (14 in the outside, 15) so surround the section (12 of supporting sleeve (10) on, 13), make by corresponding clamping plate (19), corresponding fasteners (18) and corresponding geosynclinal block (17) are applied to the section (12 that power on the corresponding clamping ring (16) makes supporting sleeve (10), 13) roof pressure pull bar.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007003562.6 | 2007-01-24 | ||
| DE102007003562A DE102007003562B4 (en) | 2007-01-24 | 2007-01-24 | Cylinder pressure measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101231205A CN101231205A (en) | 2008-07-30 |
| CN101231205B true CN101231205B (en) | 2011-01-26 |
Family
ID=39004335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100038376A Expired - Fee Related CN101231205B (en) | 2007-01-24 | 2008-01-24 | Cylinder pressure measuring device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2008180715A (en) |
| KR (1) | KR20080069911A (en) |
| CN (1) | CN101231205B (en) |
| DE (1) | DE102007003562B4 (en) |
| FI (1) | FI121096B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11536618B2 (en) * | 2019-02-15 | 2022-12-27 | Valley Forge & Bolt Mfg. Co. | External tie-rod load indicator |
| JP7500176B2 (en) * | 2019-10-16 | 2024-06-17 | ミネベアミツミ株式会社 | Strain sensor and strain measurement method |
| CN111103143B (en) * | 2019-12-18 | 2021-11-02 | 西安航天动力研究所 | Thermal protection mounting structure of pressure measuring sensor in narrow space |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683757A (en) * | 1986-03-24 | 1987-08-04 | Motorola, Inc. | Axial pressure sensor |
| DE4206592A1 (en) * | 1992-03-03 | 1993-09-09 | Nowak Klaus | METHOD AND DEVICE FOR MEASURING THE POWER OF ENGINES |
| JP2578963Y2 (en) * | 1993-04-23 | 1998-08-20 | 三菱重工業株式会社 | In-cylinder pressure measurement device for diesel engines |
| JPH0882565A (en) * | 1994-09-13 | 1996-03-26 | Mitsubishi Heavy Ind Ltd | Measuring device for pressure within cylinder |
| GB2314882A (en) * | 1996-06-24 | 1998-01-14 | Cummins Engine Co Inc | Controlling fuel supply to i.c. engine using cylinder pressure measurements derived from strain gauge in cylinder head bolt |
| DE19803470B4 (en) * | 1998-01-29 | 2004-07-15 | Siemens Ag | Method and device for determining the gas forces in the combustion chamber of an internal combustion engine |
| DE10018265B4 (en) * | 2000-04-13 | 2005-02-03 | IFT Ingenieurgesellschaft für Fahrzeugtechnik mbH | Measuring arrangement for the indirect combustion chamber pressure sensing of an internal combustion engine in operation |
-
2007
- 2007-01-24 DE DE102007003562A patent/DE102007003562B4/en not_active Expired - Fee Related
-
2008
- 2008-01-16 FI FI20085035A patent/FI121096B/en not_active IP Right Cessation
- 2008-01-21 JP JP2008010911A patent/JP2008180715A/en active Pending
- 2008-01-22 KR KR1020080006654A patent/KR20080069911A/en not_active Application Discontinuation
- 2008-01-24 CN CN2008100038376A patent/CN101231205B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101231205A (en) | 2008-07-30 |
| DE102007003562A1 (en) | 2008-08-07 |
| FI20085035A0 (en) | 2008-01-16 |
| DE102007003562B4 (en) | 2010-12-16 |
| KR20080069911A (en) | 2008-07-29 |
| JP2008180715A (en) | 2008-08-07 |
| FI20085035A (en) | 2008-07-25 |
| FI121096B (en) | 2010-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20120124 |