CN106197840A - The cylinder pressure instrument connection structure of high-power diesel engine cylinder head - Google Patents
The cylinder pressure instrument connection structure of high-power diesel engine cylinder head Download PDFInfo
- Publication number
- CN106197840A CN106197840A CN201610502340.3A CN201610502340A CN106197840A CN 106197840 A CN106197840 A CN 106197840A CN 201610502340 A CN201610502340 A CN 201610502340A CN 106197840 A CN106197840 A CN 106197840A
- Authority
- CN
- China
- Prior art keywords
- sensor
- instrument connection
- pressure passage
- cylinder head
- measuring pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- 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
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- 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 provides the cylinder pressure instrument connection structure of high-power diesel engine cylinder head, described cylinder pressure instrument connection is installed screwed hole by the measuring pressure passage set gradually in cylinder head, sensor and sensor is installed counterbore and formed, described measuring pressure passage, sensor are installed the axle center of screwed hole and sensor installation counterbore and are positioned on same centrage, and described sensor is installed screwed hole and is provided with transducer tip cavity volume near one end of measuring pressure passage.Present invention have the advantage that the present invention uses this kind of design structure, measuring pressure passage is vertical with sensor baseplane, can reduce pressure oscillation；This kind of design structure reduces measuring pressure passage length, reduces transducer tip cavity volume volume, makes whole cylinder pressure TCH test channel have higher natural frequency, it is simple to uses low-pass filtering, thus obtains cylinder pressure the most accurately.
Description
Technical field
The invention belongs to combustion engine cylinder head design field, especially relate to a kind of high-power diesel engine cylinder head
Cylinder pressure instrument connection structure.
Background technology
The Engine Indicator Diagram analysis and research to engine performance, and to the improvement of internal combustion engine be designed with important meaning
Justice, can calculate law of heat release by indicator card thus study cylinder of diesel engine combustion process.Accurately extract indicator card, effectively go
Except errors various in indicator card are the bases of whole analysis work, it it is the basic assurance obtaining accurate analysis result.
Generally gathering indicator card with pressure transducer, recommended pressure sensor flushes peace with cylinder head baseplane in theory
Dress.But affected by the gentle road of cylinder head water cavity, flushly mount with hardly possible realization, typically in pressure transducer and burning
One section of interface channel, referred to as measuring pressure passage is added between room.Due to the existence of measuring pressure passage, the gas that pressure transducer collects
Vibrating not only occurs in cylinder pressure, and delayed phase, distortion is serious.The rate of pressure rise calculated according to this piezometer and heat release
Rate, also masks its real physical significance because of the pressure oscillation composition of passage.The frequency of pressure oscillations and amplitude, with pressure measurement
The shape of passage has substantial connection.
Using " smoothing method " that indicator card carries out process is a kind of most common method, and smoothing method is that a kind of weighting is slided flat
All calculate method, easily information useful in indicator card is filtered.A kind of relatively accurate filtering method is frequency domain filtering, is to pass through
Find out the natural frequency section of measuring pressure passage, be filtered processing to it." diesel engine test skill by Yang Guang, Wei Rongnian chief editor
Art " book P299 page points out that measuring pressure passage natural frequency is greater than more than 2 times of measured signal upper limiting frequency.Now can be to passage
Pressure low-pass filtering, thus filter off oscillationg component, the farthest useful component in reserve channel pressure.
But engineering only considers in the design of cylinder pressure instrument connection the test position of pressure tap and measuring pressure passage with
The interference situation of cylinder head water cavity and air flue, does not consider the measuring pressure passage impact on test result, thus results in cylinder pressure and surveys
The measuring pressure passage natural frequency of prospect hole is on the low side, and the frequency band that passage is corresponding overlaps with true cylinder pressure high frequency band, if used
Low-pass filtering, can filter the radio-frequency component of true cylinder pressure simultaneously, makes the maximum pressure rate of rise calculated reduce, the strong deflagration phase
Heat release is floating.
Summary of the invention
In view of this, it is contemplated that propose the cylinder pressure instrument connection structure of a kind of high-power diesel engine cylinder head, with
Solve tradition cylinder pressure instrument connection measuring pressure passage natural frequency low, overlap with true cylinder pressure high frequency band, it is impossible to pass through
The defect of true cylinder pressure is extracted in filtering.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The cylinder pressure instrument connection structure of high-power diesel engine cylinder head, described cylinder pressure instrument connection is depended on by cylinder head
Screwed hole installed by the measuring pressure passage of secondary setting, sensor and counterbore composition installed by sensor, and described measuring pressure passage, sensor are installed
Screwed hole and sensor are installed the axle center of counterbore and are positioned on same centrage, and described sensor is installed screwed hole and led near pressure measurement
The one end in road is provided with transducer tip cavity volume.
Further, a diameter of 4mm of described measuring pressure passage.
Further, the bottom surface milling of described transducer tip cavity volume is put down, and cavity volume height is 1mm.
Relative to prior art, present invention have the advantage that
(1) present invention uses this kind of design structure, and measuring pressure passage is vertical with sensor baseplane, can reduce pressure oscillation；
This kind of design structure reduces measuring pressure passage length, reduces transducer tip cavity volume volume, makes whole cylinder pressure test
Passage has higher natural frequency, it is simple to uses low-pass filtering, thus obtains cylinder pressure the most accurately.
(2) present configuration is simple, easily realizes.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is cylinder pressure instrument connection structural representation of the present invention；
Fig. 2 is cylinder pressure measuring pressure passage structural representation of the present invention.
Description of reference numerals:
Screwed hole installed by 1-measuring pressure passage, 2-sensor, 3-sensor installs counterbore, 4-cylinder head, 5-transducer tip
Cavity volume, 6-sensor.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Combination mutually.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
The cylinder pressure instrument connection structure of high-power diesel engine cylinder head, as shown in Figure 1, 2, described cylinder pressure instrument connection
By the measuring pressure passage 1 set gradually in cylinder head, sensor, screwed hole 2 is installed and sensor is installed counterbore 3 and formed, described pressure measurement
Passage 1, sensor are installed the axle center of screwed hole 2 and sensor installation counterbore 3 and are positioned on same centrage, and described sensor is pacified
Dress screwed hole 2 is provided with transducer tip cavity volume 5 near one end of measuring pressure passage 1.
The diameter design of described measuring pressure passage 1 is that 4mm is optimum, and its length is according to arrangement space, and the shortest more good, this is direct
Have influence on test effect.
The bottom surface milling of described transducer tip cavity volume 5 is put down, and cavity volume height is that 1mm is optimum.
Sensor 6 of the present invention uses counterbore to install, cylinder pressure instrument connection not with air flue and the water cavity of cylinder head
Under constraints Deng interference, length and the position of counterbore 3 is installed by regulation sensor, makes described measuring pressure passage 1 the shortest,
Measuring pressure passage 1 length significantly shortens；Sensor is installed screwed hole 2 baseplane milling and is put down, and does not stay cone angle.Whole cylinder pressure is made to test
Passage has higher natural frequency, it is simple to uses low-pass filtering, thus obtains cylinder pressure the most accurately.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (3)
1. the cylinder pressure instrument connection structure of high-power diesel engine cylinder head, it is characterised in that: described cylinder pressure instrument connection by
The measuring pressure passage (1), the sensor that set gradually in cylinder head install screwed hole (2) and sensor installation counterbore (3) composition, described
Measuring pressure passage (1), sensor are installed the axle center of screwed hole (2) and sensor installation counterbore (3) and are positioned on same centrage, institute
State sensor installation screwed hole (2) and be provided with transducer tip cavity volume (5) near one end of measuring pressure passage (1).
The cylinder pressure instrument connection structure of high-power diesel engine cylinder head the most according to claim 1, it is characterised in that: institute
State a diameter of 4mm of measuring pressure passage (1).
The cylinder pressure instrument connection structure of high-power diesel engine cylinder head the most according to claim 1, it is characterised in that: institute
The bottom surface milling stating transducer tip cavity volume (5) is put down, and cavity volume height is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502340.3A CN106197840A (en) | 2016-06-29 | 2016-06-29 | The cylinder pressure instrument connection structure of high-power diesel engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502340.3A CN106197840A (en) | 2016-06-29 | 2016-06-29 | The cylinder pressure instrument connection structure of high-power diesel engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106197840A true CN106197840A (en) | 2016-12-07 |
Family
ID=57463829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610502340.3A Pending CN106197840A (en) | 2016-06-29 | 2016-06-29 | The cylinder pressure instrument connection structure of high-power diesel engine cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106197840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017113838A1 (en) * | 2017-06-22 | 2018-12-27 | Man Diesel & Turbo Se | Internal combustion engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122187A (en) * | 1994-10-27 | 1996-05-17 | Fuji Oozx Inc | Measuring device for pressure in cylinder in diesel engine |
| CN2695939Y (en) * | 2004-05-21 | 2005-04-27 | 上海柴油机股份有限公司 | Built-in type mounting device for diesel engine cylinder pressure sensor |
| CN101158611A (en) * | 2007-11-15 | 2008-04-09 | 重庆长安汽车股份有限公司 | Engines cylinder pressure sensor installation sealing structure |
| CN102162406A (en) * | 2011-03-31 | 2011-08-24 | 重庆长安汽车股份有限公司 | Mounting structure of motor cylinder pressure sensor |
| CN202853840U (en) * | 2012-10-24 | 2013-04-03 | 东风汽车公司 | Cylinder pressure sensor mounting and fixing structure |
-
2016
- 2016-06-29 CN CN201610502340.3A patent/CN106197840A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122187A (en) * | 1994-10-27 | 1996-05-17 | Fuji Oozx Inc | Measuring device for pressure in cylinder in diesel engine |
| CN2695939Y (en) * | 2004-05-21 | 2005-04-27 | 上海柴油机股份有限公司 | Built-in type mounting device for diesel engine cylinder pressure sensor |
| CN101158611A (en) * | 2007-11-15 | 2008-04-09 | 重庆长安汽车股份有限公司 | Engines cylinder pressure sensor installation sealing structure |
| CN102162406A (en) * | 2011-03-31 | 2011-08-24 | 重庆长安汽车股份有限公司 | Mounting structure of motor cylinder pressure sensor |
| CN202853840U (en) * | 2012-10-24 | 2013-04-03 | 东风汽车公司 | Cylinder pressure sensor mounting and fixing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017113838A1 (en) * | 2017-06-22 | 2018-12-27 | Man Diesel & Turbo Se | Internal combustion engine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |