CN201297223Y - Distribution pump advancer stroke sensor with high-pressure end configuration structure - Google Patents
Distribution pump advancer stroke sensor with high-pressure end configuration structure Download PDFInfo
- Publication number
- CN201297223Y CN201297223Y CNU2008202163709U CN200820216370U CN201297223Y CN 201297223 Y CN201297223 Y CN 201297223Y CN U2008202163709 U CNU2008202163709 U CN U2008202163709U CN 200820216370 U CN200820216370 U CN 200820216370U CN 201297223 Y CN201297223 Y CN 201297223Y
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- China
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- advancing device
- hall element
- piston
- advancer
- proportioning pump
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Abstract
The utility model relates to a distribution pump advancer stroke sensor with high-pressure end configuration structure, which is used for accurately adjusting the oil supply advance angle and oil supply amount of diesel engine axial plunger distribution pump. the sensor comprises a sensor body (1) mounted on the distribution pump body close to the advancer piston high pressure oil chamber end, a blind hole is formed as Hall element installation cavity (1.1) on the sensor body (1) far from the advancer piston high pressure oil chamber end; a Hall element (7) and a programmer (6) are disposed in the Hall element installation cavity (1.1); the programmer (6) is fixed to outside of the Hall element (7); a compensation magnetic steel (3) is mounted on outside of the programmer (6); another blind hole (1.2) is formed on the sensor body (1) close to the advancer piston high pressure oil chamber end; a sensing element (2) is disposed in the blind hole (1.2), installed on the distribution pump advancer piston, while is coaxial with the advancer piston shaft. The advancer piston stroke sensor in the utility model achieves the advantages of wide linearity range, small volume, high precision and easy controlling.
Description
(1) technical field
The utility model relates to a kind of proportioning pump, is 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 technique
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 advance angle 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 return 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, return spring 10 is moved to the left advancing device piston 8, pin 18 clockwise rotates roller base 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 return spring 10 moves right, roller base 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 advance angle, thereby satisfy the diesel emission requirement by the diesel engine condition requirement.
So advancing device piston stroke 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 advance angle variable quantity is then measured by measuring the corner time difference 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 piston stroke 10mm internal linear degree error requirements is no more than 1%, so do not satisfy requirement.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and the proportioning pump advancing device stroke sensor of a kind of linearity scope than broad is provided.
The purpose of this utility model is achieved in that a kind of novel high-pressure end end interposed structure proportioning pump advancing device 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 sense cell in this blind hole, and this sense cell is installed on the advancing device piston of proportioning pump, and this sense cell is coaxial with advancing device piston axes line.
The utility model novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor, described sense cell 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 outside thread, and described sense cell is fixedlyed connected with described advancing device piston by this outside thread.
When sense cell moves with the advancing device piston, magnetic 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 piston stroke strictness, to satisfy the proportioning pump requirement by the linearity requirement.
The utility model advancing device piston stroke linear sensor degree scope is than broad, and volume is little, the precision height, and control is fit to mass production easily.
(4) description of drawings
Fig. 1 is axial plunger proportioning pump advance angle Principles of Regulation figure in the past.
Fig. 2 is for adopting the structural representation of the utility model novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor.
Fig. 3 is for adopting the proportioning pump structural representation of the utility model high voltage terminal end interposed structure advancing device stroke sensor.
The sense cell structural representation that Fig. 4 adopts for the utility model.
Reference character among the figure:
Sensor body 1
Sense cell 2
Rubber protecting jacket 5
The pump housing 9
Return 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
Outside thread 2.1.3.
(5) embodiment
Referring to Fig. 2～3, the novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor that the utility model relates to, be installed on the pump housing 9 of proportioning pump advancing device piston hyperbaric chamber 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 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 protecting jacket 5 in 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 sense cell 2 in this blind hole 1.2, this sense cell 2 is installed on the advancing device piston 11 of proportioning pump, coaxial with advancing device piston 11 shaft axiss, identical with advancing device piston 11 moving direction.
Referring to Fig. 4, described sense cell 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 outside thread 2.1.3, and described sense cell 2 is fixedlyed connected with described advancing device piston 11 by this outside 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, a kind of novel high-pressure end end interposed structure proportioning pump advancing device 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 sense cell (2) in this blind hole (1.2), this sense cell (2) is installed on the advancing device piston of proportioning pump, and this sense cell (2) is coaxial with advancing device piston axes line.
2, a kind of novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor according to claim 1, it is characterized in that described sense cell (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 outside thread (2.1.3), and described sense cell (2) is fixedlyed connected with described advancing device piston by this outside thread (2.1.3).
3, a kind of novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor according to claim 2 is characterized in that describedly should being outside equipped with bound edge (2.1.1) by brute force magnet steel (2.2).
4,, it is characterized in that being provided with the housing (8) of steel in described sensor body (1) periphery according to claim 1,2 or 3 described a kind of novel high-pressure end end interposed structure proportioning pump advancing device stroke sensors.
5, a kind of novel high-pressure end end interposed structure proportioning pump advancing device stroke sensor according to claim 4 is characterized in that described housing (8) outer end is provided with rubber protecting jacket (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202163709U CN201297223Y (en) | 2008-11-17 | 2008-11-17 | Distribution pump advancer stroke sensor with high-pressure end configuration structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202163709U CN201297223Y (en) | 2008-11-17 | 2008-11-17 | Distribution pump advancer stroke sensor with high-pressure end configuration structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297223Y true CN201297223Y (en) | 2009-08-26 |
Family
ID=41043202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202163709U Expired - Lifetime CN201297223Y (en) | 2008-11-17 | 2008-11-17 | Distribution pump advancer stroke sensor with high-pressure end configuration structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201297223Y (en) |
-
2008
- 2008-11-17 CN CNU2008202163709U patent/CN201297223Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090826 Effective date of abandoning: 20081117 |