CN109990693A - A kind of method and device detecting piston top dead center - Google Patents
A kind of method and device detecting piston top dead center Download PDFInfo
- Publication number
- CN109990693A CN109990693A CN201910372623.4A CN201910372623A CN109990693A CN 109990693 A CN109990693 A CN 109990693A CN 201910372623 A CN201910372623 A CN 201910372623A CN 109990693 A CN109990693 A CN 109990693A
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- Prior art keywords
- top dead
- dead center
- sensor
- piston
- piston top
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000011897 real-time detection Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
-
- 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
- G01M15/02—Details or accessories of testing apparatus
-
- 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
- G01M15/06—Testing internal-combustion engines by monitoring positions of pistons or cranks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a kind of methods for detecting piston top dead center, belong to engine detection technique field, it is main to be to solve the technical issues of detection piston accurately reaches top dead centre and reaches the time of top dead centre, this method is that a TDCS TDC Sensor is arranged in oil injector hole and protrudes into the probe of the TDCS TDC Sensor in cylinder-bore, engine operation is dragged according to predetermined rule using external equipment, use the height of the probe real-time detection piston-top surface movement, record the maximum value or minimum value and the maximum value or minimum value corresponding time that the TDCS TDC Sensor exports, it obtains piston top dead center and reaches the time of top dead centre.The invention also discloses a kind of devices of detection piston top dead center for realizing the above method.The present invention can accurately detect piston and reach top dead centre and reach the time of top dead centre.
Description
Technical field
The present invention relates to engine detection technique fields, more specifically, it relates to a kind of side for detecting piston top dead center
Method and device.
Background technique
During diesel engine development experiments, by accurately controlling the opening of valve, open the time, and oil spout is accurately controlled
The injection time and distributive value of device, thus make engine in optimal working condition, and this is opened, opens time needs by piston
The time of top dead centre is reached to determine.This just must first know when piston reaches top dead centre.In the past generally by meter
Calculate crankshaft corner come determine piston top dead center indirectly, this top dead centre calculated with actually have error.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the prior art above-mentioned deficiency, the purpose of the present invention one there is provided
A kind of method that can accurately detect piston and reach top dead centre with the detection piston top dead center for the time for reaching top dead centre.
There is provided a kind of times that can accurately detect piston and reach top dead centre and arrival top dead centre for the purpose of the present invention two
Detection piston top dead center device.
To achieve the goals above one, the present invention provides a kind of method for detecting piston top dead center, and this method is in oil spout
One TDCS TDC Sensor is set in device hole and protrudes into the probe of the TDCS TDC Sensor in cylinder-bore, is pressed using external equipment
According to predetermined rule dragging engine operation, using the height of the probe real-time detection piston-top surface movement, record it is described it is upper only
The maximum value or minimum value and the maximum value of point sensor output or minimum value corresponding time, obtain piston top dead center and
Reach the time of top dead centre.
To achieve the goals above two, the present invention provides a kind of device for detecting piston top dead center, including top dead centre sensing
Device and be plugged in oil injector hole for installing the installation set of the TDCS TDC Sensor, be equipped in the installation set and institute
The compatible stepped hole in TDCS TDC Sensor periphery is stated, the probe of the TDCS TDC Sensor is passed down through the stepped hole simultaneously
It protrudes into cylinder-bore, internal screw thread of the stepped hole upper end equipped with the locking TDCS TDC Sensor, under the stepped hole
End is equipped with the pilot hole for guiding the probe；It further include the test equipment being electrically connected with the TDCS TDC Sensor.
As a further improvement, further including the pressing plate being pressed on the installation set in cylinder head.
Further, the two sides of the installation set are respectively equipped with an indent, and one end of the pressing plate is equipped with and can be socketed
The U-type groove of the indent described in two sides, the other end are equipped with support portion, and the middle part of the pressing plate, which is equipped with, compresses screw hole.
Further, the installation set lower end is equipped with gasket seal.
Further, the installation set periphery is equipped with and the consistent ladder outer circle of fuel injector shape.
Further, the TDCS TDC Sensor is the sensor of model TDC-Sensor 428.
Beneficial effect
Compared with prior art, the present invention having the advantage that are as follows: the TDCS TDC Sensor in the present invention passes through oil injector hole
It extend into cylinder-bore and directly detects the height of piston-top surface movement, can accurately detect piston and reach top dead centre and reach top dead centre
Time, to guarantee that engine is in optimal working condition.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the partial enlarged view in Fig. 1；
Fig. 3 is the structural schematic diagram of TDCS TDC Sensor and installation set assembly in the present invention；
Fig. 4 is the structural schematic diagram of installation set in the present invention.
Wherein: 1- TDCS TDC Sensor, 2- installation set, 3- stepped hole, 4- probe, 5- internal screw thread, 6- pilot hole, 7- cylinder
Lid, 8- pressing plate, 9- indent, 10- support portion, 11- gasket seal, 12- ladder outer circle, 13- vibration insulating ring, 14- annular groove, 15- are compressed
Bolt, 16- output interface, 17- piston.
Specific embodiment
The present invention is described further for specific embodiment in reference to the accompanying drawing.
Refering to fig. 1-4, a method of detection piston top dead center, this method are that top dead centre biography is arranged in oil injector hole
Sensor 1 simultaneously protrudes into the probe 4 of TDCS TDC Sensor 1 in cylinder-bore, drags engine according to predetermined rule using external equipment
Work, i.e. external equipment are rotated according to the crankshaft of predetermined rule dragging engine, and external equipment can be the motor of test-bed,
Predetermined rule can be desired speed or predetermined corner, the height moved using probe 4 real-time detection piston, 17 top surface, on record
The maximum value or minimum value and maximum value or minimum value corresponding time that dead center sensor 1 exports, obtain piston top dead center and
The time for reaching top dead centre, what TDCS TDC Sensor 1 exported when reaching top dead centre as piston is maximum value or minimum value is
It is determined according to 1 model of TDCS TDC Sensor of actual use.
A kind of device detecting piston top dead center, including TDCS TDC Sensor 1 and be plugged in oil injector hole for pacifying
The installation set 2 of dead center sensor 1 is loaded onto, the compatible stepped hole 3 with 1 periphery of TDCS TDC Sensor is equipped in installation set 2, it is upper to stop
The probe 4 of point sensor 1 is passed down through stepped hole 3 and protrudes into cylinder-bore, and 3 upper end of stepped hole is equipped with locking TDCS TDC Sensor
1 internal screw thread 5,3 lower end of stepped hole are equipped with the pilot hole 6 of guidance probe 4；It further include being electrically connected with TDCS TDC Sensor 1
Test equipment, the output interface 16 of TDCS TDC Sensor 1 are electrically connected test equipment, and test equipment is for recording top dead centre sensing
The maximum value or minimum value and maximum value or minimum value corresponding time that device 1 exports, and on output piston top dead centre and arrival
The time of stop.
The present apparatus further includes the pressing plate 8 being pressed on installation set 2 in cylinder head 7, and the two sides of installation set 2 are respectively equipped with one
Indent 9, one end of pressing plate 8 are equipped with the U-type groove that can be socketed on two sides indent 9, and the other end is equipped with support portion 10, in pressing plate 8
Portion, which is equipped with, compresses screw hole, is the structure of triangular arrangement between the middle part and both ends of pressing plate 8, is passed through and compressed by hold-down bolt 15
Pressing plate 8 is locked in cylinder head 7 by screw hole.
In the present embodiment, 2 lower end of installation set is equipped with gasket seal 11, seals during piston 17 pumps
Gasket 11 can prevent the impurity such as dust or iron filings to be inhaled into cylinder, and gasket seal 11 can be made of copper material.Installation
Set 2 periphery be equipped with the consistent ladder outer circle 12 of fuel injector shape, can be convenient by installation set 2 be packed into oil injector hole in, and
2 accurate positioning of installation set.
In the present embodiment, the periphery of installation set 2 is equipped at least one vibration insulating ring 13, installation set 2 be equipped with for install every
The annular groove 14 of ring 13 is shaken, vibration insulating ring 13 is made of flexible material, and it can prevent the vibration of engine from damaging TDCS TDC Sensor 1,
Influence of the vibration of engine to 1 detection accuracy of TDCS TDC Sensor can be reduced simultaneously.
In the present embodiment, TDCS TDC Sensor 1 is the sensor of model TDC_Sensor428,
TDC_Sensor428 sensor is capacitance type sensor, in actual use, the minimum of probe 4 and 17 top surface of piston
Distance about 0.5mm, probe 4 without contact piston 17 can be detected 17 top surface of piston movement height, can to avoid probe 4 with
17 hard contact of piston and damage.
TDCS TDC Sensor in the present invention is extend into cylinder-bore by oil injector hole directly detects piston-top surface movement
Height, can accurately detect piston reach top dead centre and reach top dead centre time, to guarantee that engine is in optimal work
Make state.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, is not taking off
Under the premise of from structure of the invention, several modifications and improvements can also be made, these all will not influence the effect that the present invention is implemented
And patent practicability.
Claims (7)
1. a kind of method for detecting piston top dead center, it is characterised in that: this method is that top dead centre biography is arranged in oil injector hole
Sensor (1) simultaneously protrudes into the probe (4) of the TDCS TDC Sensor (1) in cylinder-bore, using external equipment according to predetermined rule
Engine operation is dragged, using the height of probe (4) real-time detection piston (17) top surface movement, the top dead centre is recorded and passes
The maximum value or minimum value and the maximum value of sensor (1) output or minimum value corresponding time, obtain piston top dead center and
Reach the time of top dead centre.
2. a kind of device for the detection piston top dead center for realizing claim 1 the method, it is characterised in that: passed including top dead centre
Sensor (1) and the installation set (2) for being used to install the TDCS TDC Sensor (1) being plugged in oil injector hole, the installation
It covers and is equipped with compatible stepped hole (3), the spy of the TDCS TDC Sensor (1) with the TDCS TDC Sensor (1) periphery in (2)
Head (4) is passed down through the stepped hole (3) and protrudes into cylinder-bore, and the stepped hole (3) upper end, which is equipped with, locks on described
The internal screw thread (5) of dead center sensor (1), the stepped hole (3) lower end are equipped with the pilot hole (6) for guiding the probe (4)；Also
Including the test equipment being electrically connected with the TDCS TDC Sensor (1).
3. a kind of device for detecting piston top dead center according to claim 2, it is characterised in that: further include by the installation
Set (2) is pressed on the pressing plate (8) on cylinder head (7).
4. a kind of device for detecting piston top dead center according to claim 3, it is characterised in that: the installation set (2)
Two sides are respectively equipped with an indent (9), and one end of the pressing plate (8), which is equipped with, can be socketed on the U-shaped of indent described in two sides (9)
Slot, the other end are equipped with support portion (10), and the middle part of the pressing plate (8), which is equipped with, compresses screw hole.
5. a kind of device for detecting piston top dead center according to claim 2, it is characterised in that: the installation set (2)
Lower end is equipped with gasket seal (11).
6. a kind of device for detecting piston top dead center according to claim 2, it is characterised in that: the installation set (2)
Periphery is equipped with and the consistent ladder outer circle (12) of fuel injector shape.
7. a kind of device of detection piston top dead center according to claim 2-6 any one, it is characterised in that: described
TDCS TDC Sensor (1) is the sensor of model TDC_Sensor428.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910372623.4A CN109990693A (en) | 2019-05-06 | 2019-05-06 | A kind of method and device detecting piston top dead center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910372623.4A CN109990693A (en) | 2019-05-06 | 2019-05-06 | A kind of method and device detecting piston top dead center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109990693A true CN109990693A (en) | 2019-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910372623.4A Pending CN109990693A (en) | 2019-05-06 | 2019-05-06 | A kind of method and device detecting piston top dead center |
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| Country | Link |
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| CN (1) | CN109990693A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778397A (en) * | 2019-09-19 | 2020-02-11 | 潍柴动力股份有限公司 | Device and method for acquiring thickness of cylinder gasket |
| CN111766077A (en) * | 2020-07-29 | 2020-10-13 | 南京锐众汽车服务有限公司 | Engine fault detection equipment and detection method |
| CN112697441A (en) * | 2020-12-30 | 2021-04-23 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
| CN113670242A (en) * | 2021-08-24 | 2021-11-19 | 潍柴动力扬州柴油机有限责任公司 | Measuring device and method for quickly measuring top dead center deviation of piston |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5027645A (en) * | 1987-11-30 | 1991-07-02 | Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. | Measuring device for determining distance |
| CN201096049Y (en) * | 2007-09-14 | 2008-08-06 | 常柴股份有限公司 | Electric control high pressure common rail diesel engine fuel injector fixing mechanism |
| CN208702592U (en) * | 2018-07-26 | 2019-04-05 | 江苏农华智慧农业科技股份有限公司 | A kind of fuel injector is fixed and clamped device |
| CN209524872U (en) * | 2019-05-06 | 2019-10-22 | 广西玉柴机器股份有限公司 | A kind of signal pickup assembly detecting piston top dead center |
-
2019
- 2019-05-06 CN CN201910372623.4A patent/CN109990693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5027645A (en) * | 1987-11-30 | 1991-07-02 | Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. | Measuring device for determining distance |
| CN201096049Y (en) * | 2007-09-14 | 2008-08-06 | 常柴股份有限公司 | Electric control high pressure common rail diesel engine fuel injector fixing mechanism |
| CN208702592U (en) * | 2018-07-26 | 2019-04-05 | 江苏农华智慧农业科技股份有限公司 | A kind of fuel injector is fixed and clamped device |
| CN209524872U (en) * | 2019-05-06 | 2019-10-22 | 广西玉柴机器股份有限公司 | A kind of signal pickup assembly detecting piston top dead center |
Non-Patent Citations (1)
| Title |
|---|
| AVL: "AVL OT-SENSOR 428", pages 1 - 4, Retrieved from the Internet <URL:https://www.avl.com/documents/10138/885965/PD+OT+Sensor+428+engl+2010.pdf> * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778397A (en) * | 2019-09-19 | 2020-02-11 | 潍柴动力股份有限公司 | Device and method for acquiring thickness of cylinder gasket |
| CN111766077A (en) * | 2020-07-29 | 2020-10-13 | 南京锐众汽车服务有限公司 | Engine fault detection equipment and detection method |
| CN112697441A (en) * | 2020-12-30 | 2021-04-23 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
| CN112697441B (en) * | 2020-12-30 | 2022-06-28 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
| CN113670242A (en) * | 2021-08-24 | 2021-11-19 | 潍柴动力扬州柴油机有限责任公司 | Measuring device and method for quickly measuring top dead center deviation of piston |
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