CN108801129A - Valve stroke test device and valve stroke test method - Google Patents
Valve stroke test device and valve stroke test method Download PDFInfo
- Publication number
- CN108801129A CN108801129A CN201810696223.4A CN201810696223A CN108801129A CN 108801129 A CN108801129 A CN 108801129A CN 201810696223 A CN201810696223 A CN 201810696223A CN 108801129 A CN108801129 A CN 108801129A
- Authority
- CN
- China
- Prior art keywords
- valve
- piezoelectric transducer
- valve stroke
- piezoelectric
- stroke test
- 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.)
- Granted
Links
Classifications
-
- 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
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention belongs to valve stroke field of measuring technique, and in particular to a kind of valve stroke test device and valve stroke test method.The test method includes carrying out temperature calibration to piezoelectric transducer, under normal temperature state, make valve opening or closing by jiggering, when measuring and recording valve opening corresponding piezoelectric signal value and the valve stroke piezoelectricity curve graph under corresponding normal temperature state is made under different air valve lift, measure the piezoelectric signal value obtained in valve actual moving process, the corresponding piezoelectricity correction value of electric transducer is pushed in conjunction with obtained different temperatures is measured, valve lift amount is obtained by comparing valve stroke piezoelectricity curve graph.By using valve stroke test device of the present invention and method, at the top of cylinder head, piezoelectric transducer is set, utilize the piezoelectric effect of piezoelectric transducer caused by the variation of the spring force generated during valve opening, indirectly calculate valve lift amount, it is accurate to measure, and can effectively improve the reliability of product.
Description
Technical field
The invention belongs to valve stroke field of measuring technique, and in particular to a kind of valve stroke test device and valve stroke
Test method.
Background technology
Valve stroke measurement method conventional at present includes mainly contact and two kinds contactless.Non-contact measurement side
Fado is measured using laser sensor, since mist of oil is more in engine operating environments, when laser sensor measuring point surface exists
When oil stain, the precision measured can be influenced.Contact measurement method mainly utilizes valve lift sensor object detection engine
The displacement of valve, to obtain valve lift curve.In the measurement process of valve lift curve, the peace of valve lift sensor
Dress mode is affected to the precision of measurement result.In valve lift curve measurement process, need to make valve lift sensor
Main body keep stablizing, while making the marking peg of valve lift sensor with valve motion.
But for some engines, one side engine it is compact-sized, especially space is narrow in its cylinder head
Small, the main body for being unfavorable for valve lift sensor is fixed；On the other hand, valve rotating mechanism, valve rotation are provided in engine
Rotation mechanism can be rotated around the axis of itself, during the opening and closing of valve, drive of the valve in valve rotating mechanism
Under can also be rotated around the axis of itself, to influence the normal work of valve lift sensor.
Invention content
The purpose of the present invention is to solve above-mentioned at least one problem, which is by the following technical programs
It realizes.
The present invention proposes a kind of valve stroke test device, which includes cylinder head and piezoelectric transducer, institute
Piezoelectric transducer is stated in the groove at the top of the cylinder head, the valve opening of the valve mechanism on being set to the cylinder head
The valve spring of the valve mechanism can either directly or indirectly act on the piezoelectric transducer, the groove during opening
The outside of the cylinder head is extended to for drawing the signal wire for connecting the piezoelectric transducer.
Further, valve stroke test device as described above, the signal wire are fixed on described recessed by fluid sealant
The inside of slot.
Further, valve stroke test device as described above, further includes signal amplifier and signal receiver, described
Piezoelectric transducer is linked in sequence successively by signal wire and the signal amplifier and the signal receiver, for amplifying and connecing
Receive the electric signal of the piezoelectric transducer output.
Further, valve stroke test device as described above, it is described when having spring lower seat on the valve mechanism
Valve spring acts on the piezoelectric transducer indirectly via the spring lower seat, when on the valve mechanism without spring lower seat
When, the valve spring directly acts on the piezoelectric transducer.
The invention also provides a kind of valve stroke test method, the valve stroke test method is according to described above
Valve stroke test device come what is implemented, the valve stroke test method includes the following steps：
Temperature calibration is carried out to piezoelectric transducer, the corresponding piezoelectricity of the piezoelectric transducer under different temperature condition is measured and repaiies
Positive value；
In different gas when under normal temperature state, making valve opening or closing by jiggering, measure and recording the valve opening
Corresponding piezoelectric signal value under door lift；
The valve stroke pressure under corresponding normal temperature state is made based on corresponding piezoelectric signal value under different valve strokes
Electric curve graph；
The piezoelectric signal value obtained in the valve actual moving process is measured, institute under the different temperatures obtained in conjunction with measurement
The corresponding piezoelectricity correction value of piezoelectric transducer is stated, valve lift amount is obtained by comparing the valve stroke piezoelectricity curve graph.
Further, valve stroke test method as described above, carrying out temperature calibration to the piezoelectric transducer includes
Following steps：
The piezoelectric transducer is placed in the insulating box of temperature-adjustable；
With -20 DEG C the temperature in the insulating box is stepped up with 5 DEG C for step-length for the initial temperature in the insulating box
Degree, until reaching 200 DEG C；
Test and record the piezoelectricity correction value of the piezoelectric transducer under condition of different temperatures.
Further, valve stroke test method as described above, described in high-precision electronic displacement sensor
Valve stroke when valve opening.
Further, valve stroke test method as described above, the room temperature are 25 DEG C.
Further, valve stroke test method as described above, the piezoelectric signal value are put by signal amplifier
It is received by signal receiver after big.
By using valve stroke test method of the present invention and test device, piezoelectricity is set at the top of cylinder head
Sensor, using the piezoelectric effect of piezoelectric transducer caused by the variation of the spring force generated during valve opening,
The calculating valve lift amount connect, it is accurate to measure, easy to operate, can effectively improve the reliability of product.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is the overall structure diagram of the embodiment of the present invention；
Fig. 2 is the flow chart that valve stroke test is carried out using embodiment in Fig. 1.
Respectively label indicates as follows in attached drawing：
11：Cylinder head, 12：Spring lower seat, 13：Piezoelectric transducer, 14：The spring seat of honour, 15：Valve, 16：Valve spring.
Specific implementation mode
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened completely is communicated to those skilled in the art.
Fig. 1 is the overall structure diagram of the embodiment of the present invention.As shown in Figure 1, the test device in the present embodiment includes
Cylinder head 11 and piezoelectric transducer 13, piezoelectric transducer 13 are set in the groove at 11 top of cylinder head, are being set to cylinder head 11
On valve mechanism valve opening during the valve spring 16 of valve mechanism can either directly or indirectly act on piezoelectricity
Sensor 13, the outside that groove extends to cylinder head 11 are used to draw the signal wire for connecting piezoelectric transducer 13.
As shown in Figure 1, the test device in the present embodiment includes cylinder head 11, spring lower seat 12, piezoelectric transducer 13, bullet
The spring seat of honour 14, valve 15 and valve spring 16.The top of cylinder head 11 is equipped with spring lower seat 12, in cylinder head 11 with spring lower seat
12 top surfaces being in contact are equipped with groove, and piezoelectric transducer 13 is placed in the groove, and by signal wire pass through cylinder head 11 with
External device communication connection.Spring lower seat 12 and the spring seat of honour 14 are sheathed on the peripheral surface of valve 15, spring lower seat 12 and spring
It is also fixedly connected with valve spring 16 between the seat of honour 14, while valve 15 opens and closes, the spring seat of honour 14 can be driven
It is mobile, to which the valve spring 16 between spring lower seat 12 and the spring seat of honour 14 is compressed.Compressed valve spring 16
With spring force, pressure can be generated to the piezoelectric transducer 13 on 11 top surface of cylinder head, to make piezoelectric transducer 13 generate
Piezoelectric effect, and export corresponding piezoelectric signal value.By the piezoelectric signal value for measuring output, you can inverse air outlet valve spring 16
Decrement, and obtain valve lift amount in turn.
Further, in this embodiment the signal wire for being used for transmission 13 output signal of piezoelectric transducer it is solid by fluid sealant
Due to the inside of groove.
Further, in this embodiment test device further include signal amplifier and signal receiver.Piezoelectric transducer
13 are linked in sequence successively by signal wire and signal amplifier and signal receiver.Signal amplifier is used for collected pressure
Electric signal is enlarged into receiver acceptable signal, and signal receiver is for receiving electric signal.
Test device in the present embodiment includes spring lower seat 12, when the structure without spring lower seat 12 on valve mechanism,
Groove is processed on 11 top surface of cylinder head that can be directly below valve spring 16, piezoelectric transducer 13 is placed in the groove.
When products application, piezoelectric transducer can be installed in the cylinder head of engine, the synchronization monitoring when vehicle is run
Valve lift amount, when valve lift amount occurs abnormal, alarm is safeguarded.
Fig. 2 is the flow chart that valve stroke test is carried out using embodiment in Fig. 1.The valve stroke test method include with
Lower step：
Temperature calibration is carried out to piezoelectric transducer, different temperature condition is measured and pushes 13 corresponding piezoelectricity amendment of electric transducer
Value.
Piezoelectric transducer is considered there are temperature drift, extraneous temperature change can influence the measurement accuracy of piezoelectric transducer,
So needing preferentially to carry out temperature calibration to piezoelectric transducer, the piezoelectricity amendment of corresponding piezoelectric transducer under different temperatures is measured
It is worth for correcting the signal drift that temperature change generates in practical measurement process.
Include the following steps specifically, carrying out temperature calibration to piezoelectric transducer：
Piezoelectric transducer is placed in the insulating box of temperature-adjustable.
The temperature in insulating box is stepped up with 5 DEG C for step-length for the initial temperature in insulating box with -20 DEG C, until reaching
To 200 DEG C.
- 20 DEG C of minimum temperatures for mainly considering that engine may use in actual use, actual use
It might have lower temperature in the process, but usage amount is less, so not carrying out the calibration of lower temperature.200 DEG C refer to
During cylinder cap use, the maximum temperature that piezoelectric transducer position is likely to be breached is arranged in top surface.
Test and record the piezoelectricity correction value that condition of different temperatures pushes electric transducer.
After completing to the temperature calibration of piezoelectric transducer, need to carry out stroke calibration to valve.
In different air valve liter when under normal temperature state, making valve opening or closing by jiggering, measure and recording valve opening
Corresponding piezoelectric signal value under journey.
In the present embodiment, normal temperature state refer to valve temperature be 25 DEG C when state.High-precision is set on the spring seat of honour
Electronic displacement sensor, for measuring valve stroke when valve opening.By manual rotation's flywheel, make engine crank-connecting rod
Mechanism and valve actuating mechanism operating, make valve opening and closing.When valve opening, valve spring compression generates certain pressure, and
Compression piezoelectric transducer makes piezoelectric transducer generate piezoelectric effect, and exports corresponding piezoelectric signal value, measures and records difference
Corresponding piezoelectric signal value under valve lift amount.
The valve stroke pressure under corresponding normal temperature state is made based on corresponding piezoelectric signal value under different valve strokes
Electric curve graph.
Valve stroke piezoelectric signal figure is made according to the corresponding piezoelectric signal value under the different air valve lift amount of record, is used
Figure is looked into according to the piezoelectric signal value of measurement in the later stage and obtains corresponding valve lift amount.
The piezoelectric signal value obtained in valve actual moving process is measured, fax is pushed in conjunction with obtained different temperatures is measured
The corresponding piezoelectricity correction value of sensor obtains valve lift amount by comparing valve stroke piezoelectricity curve graph.
In the actual motion in valve later stage, by the piezoelectric signal value of the piezoelectric transducer at a temperature of the actual motion of valve
It is made the difference with piezoelectricity correction value, obtains the piezoelectric signal value of the piezoelectric transducer under room temperature, and by comparing piezoelectric signal curve graph
Obtain the valve lift amount under state at this time.
By using valve stroke test method of the present invention and test device, piezoelectricity is set at the top of cylinder head
Sensor, using the piezoelectric effect of piezoelectric transducer caused by the variation of the spring force generated during valve opening,
The calculating valve lift amount connect, it is accurate to measure, easy to operate, can effectively improve the reliability of product.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (9)
1. a kind of valve stroke test device, which is characterized in that including cylinder head and piezoelectric transducer, the piezoelectric transducer is set
In groove at the top of the cylinder head, the gas during valve opening of the valve mechanism on being set to the cylinder head
The valve spring of door machine structure can either directly or indirectly act on the piezoelectric transducer, and the groove extends to the cylinder
The outside of lid is for drawing the signal wire for connecting the piezoelectric transducer.
2. valve stroke test device according to claim 1, which is characterized in that the signal wire is fixed by fluid sealant
In the inside of the groove.
3. valve stroke test device according to claim 1, which is characterized in that further include that signal amplifier and signal connect
Device is received, the piezoelectric transducer is linked in sequence successively by signal wire and the signal amplifier and the signal receiver, is used
In the electric signal for amplifying and receiving the piezoelectric transducer output.
4. valve stroke test device according to claim 1, which is characterized in that have under spring when on the valve mechanism
When seat, the valve spring acts on the piezoelectric transducer indirectly via the spring lower seat, when on the valve mechanism
When without spring lower seat, the valve spring directly acts on the piezoelectric transducer.
5. a kind of valve stroke test method, the valve stroke test method is according to any one of Claims 1-4 institute
The valve stroke test device stated is implemented, which is characterized in that the valve stroke test method includes the following steps：
Temperature calibration is carried out to piezoelectric transducer, measures the corresponding piezoelectricity amendment of the piezoelectric transducer under different temperature condition
Value；
In different air valve liter when under normal temperature state, making valve opening or closing by jiggering, measure and recording the valve opening
Corresponding piezoelectric signal value under journey；
The valve stroke Piezoelectric Curved under corresponding normal temperature state is made based on corresponding piezoelectric signal value under different valve strokes
Line chart；
The piezoelectric signal value obtained in the valve actual moving process is measured, the pressure under the different temperatures obtained in conjunction with measurement
The corresponding piezoelectricity correction value of electric transducer obtains valve lift amount by comparing the valve stroke piezoelectricity curve graph.
6. valve stroke test method according to claim 5, which is characterized in that the piezoelectric transducer into trip temperature
Calibration includes the following steps：
The piezoelectric transducer is placed in the insulating box of temperature-adjustable；
The temperature in the insulating box is stepped up, directly with 5 DEG C for step-length with -20 DEG C for the initial temperature in the insulating box
To reaching 200 DEG C；
Test and record the piezoelectricity correction value of the piezoelectric transducer under condition of different temperatures.
7. valve stroke test method according to claim 5, which is characterized in that pass through high-precision electronic displacement sensor
Measure the valve stroke when valve opening.
8. valve stroke test method according to claim 5, which is characterized in that the room temperature is 25 DEG C.
9. valve stroke test method according to claim 5, which is characterized in that the piezoelectric signal value is amplified by signal
Device is received after being amplified by signal receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810696223.4A CN108801129B (en) | 2018-06-29 | 2018-06-29 | Valve lift testing device and valve lift testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810696223.4A CN108801129B (en) | 2018-06-29 | 2018-06-29 | Valve lift testing device and valve lift testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108801129A true CN108801129A (en) | 2018-11-13 |
| CN108801129B CN108801129B (en) | 2020-10-30 |
Family
ID=64072631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810696223.4A Active CN108801129B (en) | 2018-06-29 | 2018-06-29 | Valve lift testing device and valve lift testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108801129B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916118A (en) * | 2021-10-28 | 2022-01-11 | 中国第一汽车股份有限公司 | CVVL valve lift measuring device and measuring method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225759A (en) * | 2008-01-25 | 2008-07-23 | 许小法 | Variable spiracula lifting device |
| CN202002627U (en) * | 2010-12-31 | 2011-10-05 | 潍柴动力股份有限公司 | Measuring device of engine valve lift |
| CN203148410U (en) * | 2013-01-28 | 2013-08-21 | 中国重汽集团济南动力有限公司 | Installation device for engine valve lift sensor |
| CN204694190U (en) * | 2015-06-26 | 2015-10-07 | 厦门理工学院 | A kind of measuring device of engine valve lift |
| CN205785826U (en) * | 2016-06-07 | 2016-12-07 | 中国石油天然气集团公司 | A kind of engine air valve lift curve measurement mechanism |
-
2018
- 2018-06-29 CN CN201810696223.4A patent/CN108801129B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225759A (en) * | 2008-01-25 | 2008-07-23 | 许小法 | Variable spiracula lifting device |
| CN202002627U (en) * | 2010-12-31 | 2011-10-05 | 潍柴动力股份有限公司 | Measuring device of engine valve lift |
| CN203148410U (en) * | 2013-01-28 | 2013-08-21 | 中国重汽集团济南动力有限公司 | Installation device for engine valve lift sensor |
| CN204694190U (en) * | 2015-06-26 | 2015-10-07 | 厦门理工学院 | A kind of measuring device of engine valve lift |
| CN205785826U (en) * | 2016-06-07 | 2016-12-07 | 中国石油天然气集团公司 | A kind of engine air valve lift curve measurement mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916118A (en) * | 2021-10-28 | 2022-01-11 | 中国第一汽车股份有限公司 | CVVL valve lift measuring device and measuring method thereof |
| CN113916118B (en) * | 2021-10-28 | 2023-11-17 | 中国第一汽车股份有限公司 | CVVL valve lift measuring device and measuring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108801129B (en) | 2020-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102419334B1 (en) | Pipe fitting including sensor | |
| US7069183B2 (en) | Early fault detection in pump valves | |
| US7056097B2 (en) | System and method for monitoring the mechanical condition of a reciprocating compressor | |
| CN110073190A (en) | Oil pressure monitoring apparatus and method in a kind of membrane compresses Oil cylinder | |
| CN102620924B (en) | Device and method for measuring dynamic rigidity of valve spring of valve mechanism | |
| CN110374857A (en) | A kind of gentle pressure monitoring device of membrane compresses oil pressure and method | |
| CN111927749B (en) | Diaphragm compressor air pressure nondestructive monitoring system and method | |
| CN108801129A (en) | Valve stroke test device and valve stroke test method | |
| US8601880B2 (en) | Wireless strain sensors, detection methods, and systems | |
| CN103234693A (en) | Digital device and method for cylinder pressure detection | |
| JPH04231839A (en) | Monitoring apparatus for periodically operating machine | |
| US20220332077A1 (en) | Device and method for monitoring a tablet press machine, preferably during continuous operation,by means of a measuring device attached to a press punch | |
| CN102011763A (en) | Hydraulic cylinder for driving self-mounting oil production platform to lift | |
| JP7007146B2 (en) | Flow detection of reciprocating compressor | |
| CN114705143A (en) | Strain monitoring device and monitoring method thereof | |
| CN109855723A (en) | A kind of test macro and test method of cavity temperature transmission characteristic curve | |
| CN209148313U (en) | A kind of device for evaluating free-piston type refrigeration machine assembling quality | |
| CN207981097U (en) | Accurate device for measuring force in a kind of autoclave | |
| CN112213028B (en) | Device and method for identifying absolute gauge pressure sensor | |
| CN110792484B (en) | Mounting structure of valve guide pipe and method for measuring thrust of valve rod on valve guide pipe | |
| US20240102578A1 (en) | Method of operating a diaphragm valve and diaphragm valve | |
| CN205879137U (en) | A automechanism for testing electronic power assisted steering axial tension goes out highly | |
| KR100520522B1 (en) | Apparatus for checking abrasion quantity of valve seat in automobile engine | |
| CN206223379U (en) | A kind of actuator airtightness measurement device | |
| CN109374330A (en) | A kind of device and evaluation method for evaluating free-piston type refrigeration machine assembling quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |