CN102996310A - Method for measuring armature travel of oil injector assembly - Google Patents
Method for measuring armature travel of oil injector assembly Download PDFInfo
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- CN102996310A CN102996310A CN2012105110297A CN201210511029A CN102996310A CN 102996310 A CN102996310 A CN 102996310A CN 2012105110297 A CN2012105110297 A CN 2012105110297A CN 201210511029 A CN201210511029 A CN 201210511029A CN 102996310 A CN102996310 A CN 102996310A
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Abstract
The invention discloses a method for measuring the armature travel of an oil injector assembly. The armature travel measuring method comprises the following steps: determining two motion limiting positions of a motion range of a combination of an armature and a valve core, wherein one of the two motion limiting positions is standard zero point, and the combination of the armature and the valve core is controlled to move in the motion range unidirectionally; selecting n motion positions of the combination of the armature and the valve core in a motion process, and carrying out induction value measurement and displacement value measurement of relative standard zero point; and obtaining an induction-displacement relationship function of an electromagnet and a control valve couple piece, after installing the other parts of a high pressure common rail fuel injector in place, measuring the corresponding induction value, then using the obtained induction-displacement relationship function to calculate an armature travel of the high pressure common rail fuel injector. The method for measuring the armature travel provided by the invention can effectively measure the armature travel of the oil injector assembly, and the measurement result has good repeatability and reproducibility.
Description
Technical field
The present invention relates to the armature travel method of measurement of injector assembly, be specifically related to measure the method for the armature travel of high pressure common rail injector assembly.
Background technique
Injector assembly is one of vitals in the diesel fuel injection system, performance and exhaust index on diesel engine have important impact, along with the raising of national emission request, the application of high-pressure common rail technology, the common rail system oil sprayer has become the focus of diesel fuel injection system technical field research.The structure of high pressure common rail injector is mainly by electromagnet, the control valve couple, pass in and out oily restricting orifice, the control piston couple, pressure adjusting spring, the formations such as oil nozzle couple, the assembly relation of electromagnet and control valve couple wherein, see Fig. 1, the control valve couple comprises armature 1, spool 2 and control valve seat 3, armature 1 is contained in the control valve seat 3 after making up with spool 2, between electromagnet 4 and the control valve seat 3 grommet 5 is housed, spring 6 is housed in the electromagnet 4, spring 6 the other ends are connected with armature 1, during assembling, electromagnet 4 and grommet 5 compactings, the effect of spring 6 so that the assemblying body of armature 1 and spool 2 can move up and down within the specific limits, this range of movement 7 is the spacing of two limit of sports record positions of armature 1, and described two limit of sports record positions are respectively the positions of armature 1 armature 1 when moving to electromagnet 4 compacting, the position of armature 1 when armature 1 moves to control valve seat 3 compacting.The working principle of high pressure common rail injector mainly is to cooperate throttle orifice to realize control to the needle-valve open and close by control valve, thereby realize the control to fuel injection quantity, injection timing and even fuel injection characteristic, the use of high pressure common rail injector, the power character that can improve diesel engine also reduces oil consumption and the discharging of diesel engine effectively.At present, the armature travel in the injector assembly control valve couple is a research point of high pressure common rail injector technical field, because armature travel is still a unknowable parameter.In the assembly process of high pressure common rail injector assembly, adopt traditional dial indicator to measure the size of related components, then select grommet and tighten the very tight cap of electromagnetism, in this assembly process, because electromagnet, grommet, control valve seat parts produce distortion after tightening, and amount of deformation is stochastic variable, so that the armature travel of injector assembly is unknowable, and the armature travel of injector assembly directly has influence on the injection characteristics of injector assembly.
Summary of the invention
The applicant improves for above-mentioned shortcoming of the prior art, and a kind of armature travel method of measurement of injector assembly is provided, and it can effectively measure the armature travel of injector assembly.
Technological scheme of the present invention is as follows:
The armature travel method of measurement of injector assembly, it comprises following steps:
A. determine two limit of sports record positions of armature and the assemblying body of spool: the bottom to the assemblying body of armature and spool applies active force, assurance armature and electromagnet compacting, and then the residing spatial position of compaction state lower armature is the first limit of sports record position at this moment; The assemblying body of control armature and spool is repositioned to and the control valve seat compacting, then the residing spatial position of compaction state lower armature this moment is the second limit of sports record position, and the spacing of the first limit of sports record position and the second limit of sports record position is the range of movement of the assemblying body of armature and spool;
B. making a limit position in described two limit of sports record positions is benchmark zero point, utilizes inductance measuring meter, from the inductance value at the wiring terminal measuring basis dead-center position place of electromagnet;
C. control assemblying body unidirectional motion in range of movement of armature and spool, in described unidirectional motion process, choose n movement position of armature, utilize inductance measuring meter, from the wiring terminal of electromagnet the inductance value at described n movement position place is measured, simultaneously the relative displacement at a described n movement position and described benchmark zero point is measured, and record described survey data, i.e. n shift value and n corresponding inductance value;
D. analyze and process the data that record in the C step, namely can obtain the inductance of electromagnet and described control valve couple-displacement relation function by n shift value and n corresponding inductance value;
E. after the high pressure common rail injector general assembly is finished, utilize inductance measuring meter, wiring terminal inductance measuring value from electromagnet, with the electromagnet of this value contrast D step acquisition and the inductance of described control valve couple-displacement relation function, extrapolate the armature travel of the injector assembly after assembling is finished.
Its further technological scheme is:
In the described A step, the amount of force that the bottom of the assemblying body of armature and spool is applied is 80N～120N.
In described B step, C step and the E step, when utilizing inductance measuring meter inductance measuring value, the ambient temperature of measurement is 20 ℃～30 ℃.
In described B step, C step and the E step, when utilizing inductance measuring meter inductance measuring value, measure and be actuated to voltage 0.1V～1KV, measuring frequency is 0～10KHz.
In the described C step, n gets 3～15.
Technique effect of the present invention:
The present invention carries out the measurement of inductance value and relative displacement value by a plurality of movement positions of assemblying body between electromagnet and control valve seat to armature and spool, thereby calculate the inductance of electromagnet and control valve couple-displacement relation function, finally can extrapolate the armature travel of high pressure common rail injector assembly by this relation, and the measurement result that obtains by method of measurement of the present invention have good repeatability of measurement and reproducibility.
Description of drawings
Fig. 1 is the assembling schematic representation of electromagnet and control valve couple in the high pressure common rail injector.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 1 is the assembling schematic representation of electromagnet 4 and control valve couple in the high pressure common rail injector, described control valve couple comprises armature 1, spool 2 and control valve seat 3, armature 1 is contained in the control valve seat 3 after making up with spool 2, between electromagnet 4 and the control valve seat 3 grommet 5 is housed, spring 6 is housed in the electromagnet 4, spring 6 the other ends are connected with armature 1, during assembling, electromagnet 4 and grommet 5 compactings, the effect of spring 6 so that the assemblying body of armature 1 and spool 2 can move up and down within the specific limits, this range of movement 7 is the spacing of two limit of sports record positions of armature 1, described two limit of sports record positions are respectively the positions of armature 1 armature 1 when moving to electromagnet 4 compacting, the position of armature 1 when armature 1 moves to control valve seat 3 compacting, method of measurement of the present invention comprises following steps:
A. determine two limit of sports record positions of armature 1 and the assemblying body of spool 2: apply size to the bottom of armature 1 and the assemblying body of spool 2 and be the active force of 80N～120N, guarantee armature 1 and electromagnet 4 compactings, then this moment, compaction state lower armature 1 residing spatial position was the first limit of sports record position; Control armature 1 is repositioned to and control valve seat 3 compactings with the assemblying body of spool 2, then this moment, compaction state lower armature 1 residing spatial position was the second limit of sports record position, and the spacing of the first limit of sports record position and the second limit of sports record position is the range of movement 7 of the assemblying body of armature 1 and spool 2;
B. making a limit position in described two limit of sports record positions is benchmark zero point, utilizes inductance measuring meter, the inductance value under the wiring terminal measuring basis dead-center position of electromagnet 4;
C. control the assemblying body of armature 1 and spool 2 at range of movement 7 interior unidirectional motions, in described unidirectional motion process, choose n movement position of armature 1, utilize inductance measuring meter, from the wiring terminal of electromagnet 4 inductance value at described n movement position place is measured, simultaneously the relative displacement at a described n movement position and described benchmark zero point is measured, and record described survey data, i.e. n shift value and n corresponding inductance value;
D. analyze and process the data that record in the C step, namely can obtain the inductance of electromagnet 4 and described control valve couple-displacement relation function by n shift value and n corresponding inductance value;
E. after the high pressure common rail injector general assembly is finished, utilize inductance measuring meter, wiring terminal inductance measuring value from electromagnet 4, with the electromagnet 4 of this value contrast D step acquisition and the inductance of described control valve couple-displacement relation function, extrapolate the armature travel of the injector assembly after assembling is finished.
Particularly, in described B step, C step and E step, when utilizing inductance measuring meter inductance measuring value, the ambient temperature of measurement is 20 ℃～30 ℃, measures and is actuated to voltage 0.1V～1KV, and measuring frequency is 0～10KHz;
In the step C, the assemblying body of control armature 1 and spool 2 is at range of movement 7 interior unidirectional motions, can move to described the second limit of sports record position from described the first limit of sports record position, also can reversing motion, choose n movement position of armature 1 in described unidirectional motion process, n gets 3～15.
Can obtain the inductance of electromagnet 4 and described control valve couple-displacement relation function by described C step, each movement position in the described n movement position can be considered the armature travel of oil sprayer with respect to the shift value at described benchmark zero point, in the E step, after other component of high pressure common rail injector all are in place, the recycling inductance measuring meter is from the wiring terminal inductance measuring value of electromagnet 4, then utilize the inductance that described C step obtains-displacement relation function, can extrapolate the armature travel of high pressure common rail injector assembly, and measurement result have good repeatability of measurement and reproducibility.
More than describing is explanation of the invention, is not that limited range of the present invention within protection scope of the present invention, can be done any type of modification referring to claim to the restriction of invention.
Claims (5)
1. the armature travel method of measurement of injector assembly is characterized in that, comprises following steps:
A. determine two limit of sports record positions of armature (1) and the assemblying body of spool (2): the bottom to armature (1) and the assemblying body of spool (2) applies active force, guarantee armature (1) and electromagnet (4) compacting, then the residing spatial position of compaction state lower armature (1) this moment is the first limit of sports record position; Control armature (1) is repositioned to and control valve seat (3) compacting with the assemblying body of spool (2), then the residing spatial position of compaction state lower armature (1) this moment is the second limit of sports record position, and the spacing of the first limit of sports record position and the second limit of sports record position is the range of movement (7) of the assemblying body of armature (1) and spool (2);
B. making a limit position in described two limit of sports record positions is benchmark zero point, utilizes inductance measuring meter, the inductance value under the wiring terminal measuring basis dead-center position of electromagnet (4);
C. control assemblying body unidirectional motion in range of movement (7) of armature (1) and spool (2), in described unidirectional motion process, choose n movement position of armature (1), utilize inductance measuring meter, from the wiring terminal of electromagnet (4) inductance value at described n movement position place is measured, simultaneously the relative displacement at a described n movement position and described benchmark zero point is measured, and record described survey data, i.e. n shift value and n corresponding inductance value;
D. analyze and process the data that record in the C step, namely can obtain the inductance of electromagnet (4) and described control valve couple-displacement relation function by n shift value and n corresponding inductance value;
E. after the high pressure common rail injector general assembly is finished, utilize inductance measuring meter, wiring terminal inductance measuring value from electromagnet (4), with the electromagnet (4) of this value contrast D step acquisition and the inductance of described control valve couple-displacement relation function, extrapolate the armature travel of the injector assembly after assembling is finished.
2. by the armature travel method of measurement of injector assembly claimed in claim 1, it is characterized in that: in the described A step, the amount of force that the bottom of armature (1) and the assemblying body of spool (2) is applied is 80N～120N.
3. by the armature travel method of measurement of injector assembly claimed in claim 1, it is characterized in that: in described B step, C step and the E step, when utilizing inductance measuring meter inductance measuring value, the ambient temperature of measurement is 20 ℃～30 ℃.
4. by the armature travel method of measurement of injector assembly claimed in claim 1, it is characterized in that: in described B step, C step and the E step, when utilizing inductance measuring meter inductance measuring value, measure and be actuated to voltage 0.1V～1KV, measuring frequency is 0～10KHz.
5. by the armature travel method of measurement of injector assembly claimed in claim 1, it is characterized in that: in the described C step, n gets 3～15.
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| CN201210511029.7A CN102996310B (en) | 2012-12-04 | 2012-12-04 | Method for measuring armature travel of oil injector assembly |
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| CN201210511029.7A CN102996310B (en) | 2012-12-04 | 2012-12-04 | Method for measuring armature travel of oil injector assembly |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103216661A (en) * | 2013-03-29 | 2013-07-24 | 北京控制工程研究所 | Non-contact debugging and measuring method of electric valve |
| CN103850851A (en) * | 2014-01-26 | 2014-06-11 | 北京博润宏达科技发展有限公司 | Method and system for detecting dynamic lift range of gag bit of common-rail oil injector |
| CN108716443A (en) * | 2018-04-09 | 2018-10-30 | 江苏伟博智能装备科技有限公司 | A kind of in-situ detection method and device of common-rail injector armature lift |
| CN108757253A (en) * | 2018-05-31 | 2018-11-06 | 广西玉柴机器股份有限公司 | A kind of judgement fuel injector coherence method |
| CN109599247A (en) * | 2018-12-11 | 2019-04-09 | 大连海事大学 | A kind of displacement self-test switch electromagnet |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103216661A (en) * | 2013-03-29 | 2013-07-24 | 北京控制工程研究所 | Non-contact debugging and measuring method of electric valve |
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| CN103850851B (en) * | 2014-01-26 | 2017-04-12 | 北京博润宏达科技发展有限公司 | Method and system for detecting dynamic lift range of gag bit of common-rail oil injector |
| CN108716443A (en) * | 2018-04-09 | 2018-10-30 | 江苏伟博智能装备科技有限公司 | A kind of in-situ detection method and device of common-rail injector armature lift |
| CN108757253A (en) * | 2018-05-31 | 2018-11-06 | 广西玉柴机器股份有限公司 | A kind of judgement fuel injector coherence method |
| CN108757253B (en) * | 2018-05-31 | 2021-02-23 | 广西玉柴机器股份有限公司 | Method for judging consistency of oil injectors |
| CN109599247A (en) * | 2018-12-11 | 2019-04-09 | 大连海事大学 | A kind of displacement self-test switch electromagnet |
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Effective date of registration: 20170718 Address after: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee after: China FAW Group Corporation Address before: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee before: Wuxi Oil Pump Nozzle Institute of First Automobile Works |
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