CN104234895A - Electrically-controlled fuel injector - Google Patents
Electrically-controlled fuel injector Download PDFInfo
- Publication number
- CN104234895A CN104234895A CN201410488680.6A CN201410488680A CN104234895A CN 104234895 A CN104234895 A CN 104234895A CN 201410488680 A CN201410488680 A CN 201410488680A CN 104234895 A CN104234895 A CN 104234895A
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- armature
- steel ball
- valve
- armature shaft
- seat
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Abstract
The invention discloses an electrically-controlled fuel injector which comprises a controller and a metering valve and is characterized in that the control valve comprises a steel ball, a steel ball base, a seal valve base, a pretensioning spring, armature, an electromagnetic valve, an armature shaft and an electromagnetic valve spring. The electrically-controlled fuel injector has the beneficial effects that the electrically-controlled fuel injector is relatively high in response speed and the impact caused by control action is effectively reduced.
Description
Technical field
The present invention relates to a kind of electronic control injection technology, particularly relate to a kind of electric-controlled fuel injector.
Background technique
In prior art, electric-controlled fuel injector assembly is generally by plunger, metering valve and control valve composition, wherein, plunger is provided with the oil sprayer control chamber communicated with its upper end face, metering valve is by the port closed of oil sprayer control chamber, fuel oil enters in oil sprayer control chamber by metering valve, control valve is then for controlling the opening and closing of metering valve filler opening, the concrete power unit controlling the opening and closing of metering valve filler opening is a steel ball, when steel ball is pushed against on the conical surface at metering valve filler opening place, metering valve filler opening is closed, when steel ball is not pushed against, metering valve filler opening is opened, steel ball is coordinated just to control the oil pressure in oil sprayer control chamber to the needle valve action on the opening and closing operations of metering valve filler opening and plunger mutually, thus realize fuel oil injection, Problems existing is: in conventional design, and owing to too taking a fancy to the compactedness of structure, general direct employing armature controls steel ball, in order to meet Electromagnetic Control needs, armature must adopt metal soft magnetic material to make, and quality is larger, during solenoid valve action, the impact that armature causes steel ball seat, steel ball and the metering valve filler opening conical surface is all comparatively large, easily weares and teares, causes sealing to reduce, in addition, during solenoid valve action, because armature will move integrally, cause that action response speed is comparatively slow, flexibility is poor.
Summary of the invention
For the problem in background technique, the present invention proposes a kind of electric-controlled fuel injector, comprise control valve and metering valve, its innovation is: described control valve is made up of steel ball, steel ball seat, seal valve seat, preloading spring, armature, solenoid valve, armature shaft and solenoid valve spring; Described seal valve seat is arranged at above metering valve, and seal valve seat lower end surface contacts with metering valve upper-end surface; Be provided with through hole in the middle part of seal valve seat, through hole is relative with the oil outlet on metering valve, and flaring installation cavity is formed at through hole bottom, and steel ball and steel ball seat are arranged in installation cavity; The sidewall of described installation cavity is communicated with the outer wall of metering valve by oil duct; Described steel ball seat is arranged at the oil outlet place of metering valve; Described steel ball is arranged between steel ball seat and metering valve; Described armature is arranged at above seal valve seat, is provided with mesopore in the middle part of armature, and the mesopore on armature communicates with the through hole on seal valve seat; Seal valve seat upper-end surface is provided with step surface one, armature lower end surface is provided with step surface two, preloading spring is socketed in outside seal valve seat and armature, and preloading spring upper end contacts with step surface two, preloading spring lower end contacts with step surface one, and preloading spring is in its pre-compressed state; Described solenoid valve is arranged at above armature, and solenoid valve lower end surface is provided with armature shaft mounting groove, and armature shaft mounting groove communicates with the mesopore on armature; Described armature shaft upper socket is in armature shaft mounting groove, be socketed in the mesopore on armature in the middle part of armature shaft, armature shaft bottom is socketed in the through hole on seal valve seat, armature shaft lower end extends to above steel ball seat, and under the effect of solenoid valve initial tension of spring, steel ball is landed on the metering valve conical surface by steel ball seat, control chamber is sealed; The intersection at armature shaft top and middle part is provided with step surface three, and step surface three is connected on armature upper-end surface; Armature shaft upper-end surface is provided with guide section, and solenoid valve lower spring end is socketed on guide section, and solenoid valve spring upper end contacts with the bottom of armature shaft mounting groove, and solenoid valve spring is in its pre-compressed state; Span is had between seal valve seat upper-end surface and armature lower end surface,
Transmission principle of the present invention is: when solenoid valve no electric circuit, and armature makes armature upper-end surface be connected to armature shaft step surface three under preloading spring power effect upwards, and armature shaft is then pushed against in steel ball seat under the effect of solenoid valve spring, and metering valve is closed; When solenoid valve is switched to "on" position by off-position, armature moves up to peak under the sucking action of solenoid valve, now, armature upper-end surface contacts with solenoid valve lower end surface, in the process that armature moves upward, by armature shaft upwards jack-up, armature shaft lower end is separated with steel ball seat, and metering valve is opened; When solenoid valve is switched to off-position by "on" position, armature is at once at self gravitation moved downward, and meanwhile, steel ball seat and steel ball, also at the moved downward of solenoid valve spring, are pushed against again on the oil outlet conical surface on metering valve by armature shaft; As can be seen from transmission principle introduction above, in the solution of the present invention, solenoid valve carrys out transmission armature shaft by controlling armature and finally pushes against steel ball position, the scheme of steel ball is pushed against compared to direct armature originally, armature shaft lighter weight of the present invention, the flexibility of motion is better, and when colliding steel ball, the impact that armature shaft causes is less; In addition, also between seal valve seat and armature, be provided with preloading spring in the present invention, the interaction of preloading spring and solenoid valve spring can improve the kinematic dexterity of movement parts further
Advantageous Effects of the present invention is: provide a kind of speed of response electric-controlled fuel injector faster, and effectively reduces the impact that control action causes.
Accompanying drawing explanation
Fig. 1, structural representation of the present invention;
In figure each mark corresponding to title be respectively: steel ball 1, steel ball seat 2, seal valve seat 3, preloading spring 4, armature 5, solenoid valve 6, armature shaft 7, solenoid valve spring 8, metering valve 9.
Embodiment
A kind of electric-controlled fuel injector, comprise control valve and metering valve 9, its innovation is: described control valve is made up of steel ball 1, steel ball seat 2, seal valve seat 3, preloading spring 4, armature 5, solenoid valve 6, armature shaft 7 and solenoid valve spring 8; Described seal valve seat 3 is arranged at above metering valve 9, and seal valve seat 3 lower end surface contacts with metering valve 9 upper-end surface; Be provided with through hole in the middle part of seal valve seat 3, through hole is relative with the filler opening on metering valve 9, and flaring installation cavity is formed at through hole bottom, and steel ball 1 and steel ball seat 2 are arranged in installation cavity; The sidewall of described installation cavity is communicated by the outer wall of oil duct with metering valve 9; Described steel ball seat 2 is arranged at the filler opening place of metering valve 9; Described steel ball 1 is arranged between steel ball seat 2 and metering valve 9; Described armature 5 is arranged at above seal valve seat 3, is provided with mesopore in the middle part of armature 5, and the mesopore on armature 5 communicates with the through hole on seal valve seat 3; Upper-end surface is provided with step surface one to seal valve seat 3, lower end surface is provided with step surface two to armature 5, and preloading spring 4 is socketed in outside seal valve seat 3 and armature 5, and preloading spring 4 upper end contacts with step surface two, preloading spring 4 lower end contacts with step surface one, and preloading spring 4 is in its pre-compressed state; Described solenoid valve 6 is arranged at above armature 5, and solenoid valve 6 lower end surface is provided with armature shaft mounting groove, and armature shaft mounting groove communicates with the mesopore on armature 5; Described armature shaft 7 upper socket is in armature shaft mounting groove, be socketed in the mesopore on armature 5 in the middle part of armature shaft 7, armature shaft 7 bottom is socketed in the through hole on seal valve seat 3, armature shaft 7 lower end extends to above steel ball seat 2, the intersection at armature shaft 7 top and middle part is provided with step surface three, and step surface three is connected on armature 5 upper-end surface; Armature shaft 7 upper-end surface is provided with guide section, and solenoid valve spring 8 lower end is socketed on guide section, and solenoid valve spring 8 upper end contacts with the bottom of armature shaft mounting groove, and solenoid valve spring 8 is in its pre-compressed state; Seal valve seat 3 upper-end surface and and armature 5 lower end surface between have span, to ensure armature shaft 7 lower end and steel ball seat 2 overlying contact.
Claims (1)
1. an electric-controlled fuel injector, comprise control valve and metering valve (9), it is characterized in that: described control valve is made up of steel ball (1), steel ball seat (2), seal valve seat (3), preloading spring (4), armature (5), solenoid valve (6), armature shaft (7) and solenoid valve spring (8); Described seal valve seat (3) is arranged at metering valve (9) top, and seal valve seat (3) lower end surface contacts with metering valve (9) upper-end surface; Seal valve seat (3) middle part is provided with through hole, and through hole is relative with the filler opening on metering valve (9), and flaring installation cavity is formed at through hole bottom, and steel ball (1) and steel ball seat (2) are arranged in installation cavity; The sidewall of described installation cavity is communicated by the outer wall of oil duct with metering valve (9); Described steel ball seat (2) is arranged at the filler opening place of metering valve (9); Described steel ball (1) is arranged between steel ball seat (2) and metering valve (9); Described armature (5) is arranged at seal valve seat (3) top, and armature (5) middle part is provided with mesopore, and the mesopore on armature (5) communicates with the through hole on seal valve seat (3); Seal valve seat (3) upper-end surface is provided with step surface one, armature (5) lower end surface is provided with step surface two, preloading spring (4) is socketed in seal valve seat (3) and armature (5) outward, preloading spring (4) upper end contacts with step surface two, preloading spring (4) lower end contacts with step surface one, and preloading spring (4) is in its pre-compressed state; Described solenoid valve (6) is arranged at armature (5) top, and solenoid valve (6) lower end surface is provided with armature shaft mounting groove, and armature shaft mounting groove communicates with the mesopore on armature (5); Described armature shaft (7) upper socket is in armature shaft mounting groove, armature shaft (7) middle part is socketed in the mesopore on armature (5), armature shaft (7) bottom is socketed in the through hole on seal valve seat (3), armature shaft (7) lower end extends to steel ball seat (2) top, the intersection at armature shaft (7) top and middle part is provided with step surface three, and step surface three is connected on armature (5) upper-end surface; Armature shaft (7) upper-end surface is provided with guide section, and solenoid valve spring (8) lower end is socketed on guide section, and solenoid valve spring (8) upper end contacts with the bottom of armature shaft mounting groove, and solenoid valve spring (8) is in its pre-compressed state; Span between seal valve seat (3) upper-end surface and solenoid valve (6) lower end surface is greater than the axial length of armature (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488680.6A CN104234895A (en) | 2014-09-23 | 2014-09-23 | Electrically-controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488680.6A CN104234895A (en) | 2014-09-23 | 2014-09-23 | Electrically-controlled fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104234895A true CN104234895A (en) | 2014-12-24 |
Family
ID=52223652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410488680.6A Pending CN104234895A (en) | 2014-09-23 | 2014-09-23 | Electrically-controlled fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104234895A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008001843A1 (en) * | 2008-05-19 | 2009-11-26 | Robert Bosch Gmbh | Magnetic valve for fuel injector, particularly fuel injector at high pressure storage injection system, has armature assembly and magnetic core in which magnetic coil is embedded and armature plate is axially relocatable at armature bolt |
| WO2010009925A1 (en) * | 2008-07-22 | 2010-01-28 | Robert Bosch Gmbh | Armature pin for solenoid valve |
| CN201531347U (en) * | 2009-10-26 | 2010-07-21 | 中国重汽集团重庆燃油喷射系统有限公司 | metering valve |
| CN204099091U (en) * | 2014-09-23 | 2015-01-14 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector |
-
2014
- 2014-09-23 CN CN201410488680.6A patent/CN104234895A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008001843A1 (en) * | 2008-05-19 | 2009-11-26 | Robert Bosch Gmbh | Magnetic valve for fuel injector, particularly fuel injector at high pressure storage injection system, has armature assembly and magnetic core in which magnetic coil is embedded and armature plate is axially relocatable at armature bolt |
| WO2010009925A1 (en) * | 2008-07-22 | 2010-01-28 | Robert Bosch Gmbh | Armature pin for solenoid valve |
| CN201531347U (en) * | 2009-10-26 | 2010-07-21 | 中国重汽集团重庆燃油喷射系统有限公司 | metering valve |
| CN204099091U (en) * | 2014-09-23 | 2015-01-14 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN109139319B (en) * | 2018-09-27 | 2023-09-29 | 重油高科电控燃油喷射系统(重庆)有限公司 | Common rail fuel injector |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |