CN101418760B - Stroke sensor for advance device of dispensing pump with high-voltage terminal fixed at one end - Google Patents
Stroke sensor for advance device of dispensing pump with high-voltage terminal fixed at one end Download PDFInfo
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- CN101418760B CN101418760B CN2008101945027A CN200810194502A CN101418760B CN 101418760 B CN101418760 B CN 101418760B CN 2008101945027 A CN2008101945027 A CN 2008101945027A CN 200810194502 A CN200810194502 A CN 200810194502A CN 101418760 B CN101418760 B CN 101418760B
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Abstract
The invention relates to a high pressure end structure distribution pump advancer stroke sensor, which is used for accurately regulating the oil supply advance angle and the oil supply amount of axial plunger distribution pump of diesel engine. The sensor comprises a sensor body (1) which is mounted on a pump body of the distribution pump adjacent to the piston high pressure oil chamber of the advancer, One end of the sensor body (1) far from the piston high pressure oil chamber of the advance is provided with a blind hole as a Hall component installing chamber (1.1), the inside of the Hall component installing chamber is provided with a Hall component (7) and a programmer (6) which is fixedly connected with the outside of the Hall component (7), the outside of the programmer (6) is mounted with a compensation magnetic steel (3), one end of the sensor body (1) adjacent to the piston high pressure oil chamber of the advancer is provided with a concave step blind hole (1.2), and the inside of the blind hole (1.2) is provided with a sensing component (2) which is mounted on the advancer piston of the distribution pump and is on the same axes with the piston shaft of the advancer. The advancer piston stroke sensor has wide linearity range, small volume, high precision, and easy control.
Description
(1) technical field
The present invention relates to a kind of proportioning pump, be specifically related to a kind of proportioning pump advancing device stroke sensor.Especially for diesel engine axial plunger proportioning pump fuel supply advance angle and fuel delivery are regulated accurately.
(2) background technology
The formulation of light-duty vehicle Abgasgesetz makes the axial plunger proportioning pump of original employing mechanical governor be difficult to satisfy diesel engine Europe 3 emission standards.This adopts electron controls technology that proportioning pump fuel supply advance angle and fuel delivery are regulated accurately with regard to needs.
Existing axial plunger proportioning pump angle of advance Principles of Regulation as shown in Figure 1.Proportioning pump fuel supply advance angle amount is regulated by advancing device piston 11, high-speed electromagnetic valve 16, stroke sensor 14 and retracing spring 10.Stroke sensor 14 is installed on the pump housing 9, and advancing device piston 11 left sides are high-voltage oil cavities 12, and the right is a low pressure oil pocket 13.When high-speed electromagnetic valve 16 is opened, high-voltage oil cavity 12 intermediate fuel oils flow into low pressure oil pocket 13 by passage 15,17, high-voltage oil cavity 12 intermediate fuel oil pressure reduce, retracing spring 10 is moved to the left advancing device piston 8, pin 18 clockwise rotates roller mount 13 on the advancing device piston 8, and fuel supply advance angle just reduces.The fuel supply advance angle reduction is measured back input electronic controller by stroke sensor 14.Otherwise high-speed electromagnetic valve 16 is closed, high-voltage oil cavity 12 intermediate fuel oil pressure increase, thereby promote advancing device piston 8, the thrust that overcomes retracing spring 10 moves right, roller mount 13 is rotated counterclockwise, fuel supply advance angle is increased, by the synergy of stroke sensor 14 and high-speed electromagnetic valve 16 and electronic controller, just can accurately play the control angle of advance, thereby satisfy the diesel emission requirement by the diesel engine condition requirement.
So advancing device throw of poston sensor is one of critical component in the said mechanism, it is good at 0～10mm scope internal linear degree to require, and control easily.
Japan zexel company adopts differential transformer to make sensor.The angle of advance variable quantity is then measured by measuring the corner mistiming by Japan electric coating company.(Xu Jialong compiles People's Transportation Press 2004 referring to " diesel electric-controlled oil spout technology ")
It is relatively simple for structure to adopt general Hall element directly to measure the advancing device stroke, but linearity scope is narrow, 1～2mm only, and axial plunger proportioning pump advancing device throw of poston 10mm internal linear degree error requirements is no more than 1%, so do not satisfy requirement.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, the proportioning pump advancing device stroke sensor of a kind of linearity scope than broad is provided.
The object of the present invention is achieved like this: a kind of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor, described sensor comprises sensor body, this sensor body is installed on the pump housing of close advancing device piston high-voltage oil cavity end of described proportioning pump, end away from the high-voltage oil cavity of advancing device piston of this sensor body is provided with a blind hole as the Hall element installation cavity, be provided with Hall element and programmable device in this Hall element installation cavity, this Hall element is fixedlyed connected with described Hall element installation cavity bottom, programmable device is fixedlyed connected with the Hall element outside, the programmable device outside is equipped with the compensation magnet steel, to improve the linear sensor degree.Lead in the programmable device leads to electronic controller and output signal.
End at the close advancing device piston high-voltage oil cavity of sensor body is provided with another blind hole, is provided with sensing element in this blind hole, and this sensing element is installed on the advancing device piston of proportioning pump, and this sensing element is coaxial with advancing device piston axes line.
Advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor of the present invention, described sensing element comprises a magnetic core bar, this magnetic core bar is a non-magnet_conductible material, this magnetic core club head is equipped with powerful magnet steel, this magnetic core bar afterbody is an external thread, and described sensing element is fixedlyed connected with described advancing device piston by this external thread.
When sensing element moves with the advancing device piston, magnetic field intensity by Hall element changes, output voltage is also changed thereupon, and the programmable device that is installed together with Hall element, to revise output voltage at any time, make it and the changing of advancing device throw of poston strictness, to satisfy the proportioning pump requirement by the linearity requirement.
Advancing device throw of poston linear sensor degree scope of the present invention is than broad, and volume is little, the precision height, and control is fit to large-lot production easily.
(4) description of drawings
Fig. 1 is axial plunger proportioning pump angle of advance Principles of Regulation figure in the past.
Fig. 2 is for adopting the structural representation of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor of the present invention.
Fig. 3 is for adopting the proportioning pump structural representation of high-pressure side end interposed structure advancing device stroke sensor of the present invention.
The sensing element structural representation that Fig. 4 adopts for the present invention.
Reference numeral among the figure:
Rubber protective sleeve 5
Bell housing 8
The pump housing 9
Retracing spring 10
Advancing device piston 11
High-voltage oil cavity 12
High-speed electromagnetic valve 16
Hall element installation cavity 1.1
Blind hole 1.2
Magnetic core bar 2.1
Powerful magnet steel 2.2
Bound edge 2.1.1.1
Cut flat position 2.1.2
External thread 2.1.3.
(5) embodiment
Referring to Fig. 2～3, the advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor that the present invention relates to, be installed on the pump housing 9 of proportioning pump advancing device piston high pressure chest end, comprise sensor body 1, this sensor body 1 usefulness screw is installed in proportioning pump near on the pump housing 9 of advancing device piston 11 high-voltage oil cavities 12 ends, this sensor body is provided with a blind hole one Hall element installation cavity 1.1 away from an end of advancing device piston 11 high-voltage oil cavities 12, be provided with Hall element 7 and programmable device 6 in this Hall element installation cavity 1.1, this Hall element 7 is fixedlyed connected with described Hall element installation cavity 1.1 bottoms, programmable device 6 is fixedlyed connected with Hall element 7 outsides, and programmable device 6 outsides are equipped with compensation magnet steel 3.Lead 4 in the programmable device 6 leads to electronic controller, and output signal.Be provided with the bell housing 8 of steel in described sensor body 1 periphery, prevent the influence of external magnetic field sensor performance.Not broken for guaranteeing lead, so be provided with rubber protective sleeve 5 in bell housing 8 outer ends.Be provided with another blind hole 1.2 in sensor body 1 near advancing device piston 11 high-voltage oil cavities 12 1 ends, be provided with sensing element 2 in this blind hole 1.2, this sensing element 2 is installed on the advancing device piston 11 of proportioning pump, coaxial with advancing device piston 11 axial lines, identical with advancing device piston 11 direction of motion.
Referring to Fig. 4, described sensing element 2 comprises a magnetic core bar 2.1, and this magnetic core bar 2.1 is a non-magnet_conductible material, and these magnetic core bar 2.1 heads are equipped with powerful magnet steel 2.2, this brute force magnet steel 2.2 is outside equipped with bound edge 2.1.1, and this bound edge 2.1.1 makes between powerful magnet steel and the magnetic core bar 2.1 and can not become flexible.These magnetic core bar 2.1 afterbodys are external thread 2.1.3, and described sensing element 2 is fixedlyed connected with described advancing device piston 11 by this external thread 2.1.3.The centre of this magnetic core bar 2.1 is for cutting flat position 2.1.2.So that the magnetic core bar is installed on the advancing device piston 11 with screw thread, must not become flexible in the motion.
Claims (5)
1. advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor, it is characterized in that described sensor comprises sensor body (1), this sensor body (1) is installed on the pump housing of close advancing device piston high-voltage oil cavity end of described proportioning pump, end away from the high-voltage oil cavity of advancing device piston of this sensor body (1) is concaved with a blind hole as Hall element installation cavity (1.1), be provided with Hall element (7) and programmable device (6) in this Hall element installation cavity (1.1), this Hall element (7) is fixedlyed connected with described Hall element installation cavity (1.1) bottom, programmable device (6) is fixedlyed connected with Hall element (7) outside, programmable device (6) outside is equipped with compensation magnet steel (3), end at the close advancing device piston high-voltage oil cavity of sensor body (1) is provided with another blind hole (1.2), be provided with sensing element (2) in this blind hole (1.2), this sensing element (2) is installed on the advancing device piston of proportioning pump, and this sensing element (2) is coaxial with advancing device piston axes line.
2. a kind of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor according to claim 1, it is characterized in that described sensing element (2) comprises a magnetic core bar (2.1), this magnetic core bar (2.1) is a non-magnet_conductible material, this magnetic core bar (2.1) head is equipped with powerful magnet steel (2.2), this magnetic core bar (2.1) afterbody is external thread (2.1.3), and described sensing element (2) is fixedlyed connected with described advancing device piston by this external thread (2.1.3).
3. a kind of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor according to claim 2 is characterized in that described powerful magnet steel (2.2) is outside equipped with bound edge (2.1.1).
4. according to claim 1,2 or 3 described a kind of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensors, it is characterized in that being provided with the bell housing (8) of steel in described sensor body (1) periphery.
5. a kind of advance device of dispensing pump with high-voltage terminal fixed at one end stroke sensor according to claim 4 is characterized in that described bell housing (8) outer end is provided with rubber protective sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101945027A CN101418760B (en) | 2008-11-17 | 2008-11-17 | Stroke sensor for advance device of dispensing pump with high-voltage terminal fixed at one end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101945027A CN101418760B (en) | 2008-11-17 | 2008-11-17 | Stroke sensor for advance device of dispensing pump with high-voltage terminal fixed at one end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101418760A CN101418760A (en) | 2009-04-29 |
| CN101418760B true CN101418760B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101945027A Expired - Fee Related CN101418760B (en) | 2008-11-17 | 2008-11-17 | Stroke sensor for advance device of dispensing pump with high-voltage terminal fixed at one end |
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| CN (1) | CN101418760B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216886351U (en) * | 2021-09-30 | 2022-07-05 | 宁德时代新能源科技股份有限公司 | Support, battery pack, electric equipment and battery replacement system |
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- 2008-11-17 CN CN2008101945027A patent/CN101418760B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101418760A (en) | 2009-04-29 |
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Granted publication date: 20101208 Termination date: 20151117 |
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