CN101963118B - Control valve structure of electronically controlled fuel injector - Google Patents
Control valve structure of electronically controlled fuel injector Download PDFInfo
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- CN101963118B CN101963118B CN201010299938XA CN201010299938A CN101963118B CN 101963118 B CN101963118 B CN 101963118B CN 201010299938X A CN201010299938X A CN 201010299938XA CN 201010299938 A CN201010299938 A CN 201010299938A CN 101963118 B CN101963118 B CN 101963118B
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- chamber
- ring
- control valve
- oil
- valve seat
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Abstract
The invention discloses a control valve structure of an electronically controlled fuel injector. The control valve structure comprises a control valve seat and a control valve plug, and a ring I and a ring II are arranged on a plug body of the control valve plug; a cavity I and a cavity II are arranged in an inner hole of the control valve seat; and communication and isolation relations of the ring I and the cavity I as well as the ring II and the cavity II are changed through the up-and-down motion of the plug body of the control valve plug. The invention has the advantages that fuel oil flows across a metering hole when the electronically controlled fuel injector receives and drains oil so that the fuel oil pressure is more precise and controllable.
Description
Technical field
The present invention relates to a kind of electronic control injection technology, relate in particular to a kind of electric-controlled fuel injector control valve structure.
Background technique
For reducing discharging, the enforcement of state's IV, V Abgasgesetz closes on day by day, and diesel engine is had higher requirement to fuel oil supply system, and fuel oil supply system develops into inevitable to common rail system, and the success or not of electric-controlled fuel injector is depended in the success or failure of common rail system research and development to a great extent.
The key of electric-controlled fuel injector is to control injection by the fuel pressure in the control metering valve chamber, by solenoid valve the fuel leakage in the top seal hyperbaric chamber is controlled simultaneously, thereby the fuel pressure in the top seal hyperbaric chamber is controlled, the control of the fuel pressure in the top seal hyperbaric chamber becomes key, and the form of control valve structure is particularly important.
Summary of the invention
For making fuel pressure more accurately controlled, the present invention proposes a kind of electric-controlled fuel injector control valve structure, it comprises control valve seat and control spool, and its improvement is: the core body of control spool is provided with two sections ring-type indents, and two sections ring-type indents are designated as ring I, ring II from top to bottom respectively; Be provided with the annular chamber of two sections indents in the endoporus of control valve seat, two sections annular chambers are designated as chamber I, chamber II from top to bottom respectively; The position relation of ring I, ring II, chamber I, chamber II satisfies: when ring I and chamber I were communicated with, ring II and chamber II were isolated; Ring II and chamber II were communicated with when ring I and chamber I were isolated;
Also be provided with metering oil duct and oil input channel on the control valve seat;
The opening of metering oil duct bottom is arranged on the lower end surface of control valve seat; Metering oil duct top is connected with an end in inlet metering hole, and the opening of the inlet metering hole the other end is arranged on the above control valve seat inner hole wall of chamber I, and is communicated with the ring I; Metering oil duct middle part is connected with an end of draining measuring hole, and the opening of the draining measuring hole the other end is communicated with the chamber II;
The opening of oil input channel bottom is arranged on the lower end surface of control valve seat, and oil input channel upper opening place is communicated with the chamber I.
The control valve seat bottom is connected with the oil-feed pad, and the oil-feed pad is provided with two oil ducts that run through the oil-feed shim body, and two oil ducts are designated as oil duct I, oil duct II respectively, and the oil duct I is communicated with metering oil duct and draining chamber; The oil duct II is communicated with oil input channel and oil suction chamber.
The core body of the control spool at ring II place is provided with the draining hole of radially running through core body.
Useful technique effect of the present invention is: electric-controlled fuel injector is when carrying out the action of oil-feed, draining, and the fuel oil measuring hole of all will flowing through makes fuel pressure more accurately controlled.
Description of drawings
Fig. 1, mounting structure schematic representation of the present invention;
Fig. 2, the present invention move a schematic representation;
Fig. 3, the present invention move two schematic representation;
Fig. 4, oil-feed pad enlarged view.
Embodiment
Structure of the present invention is: it comprises control valve seat 2 and control spool 3, and the core body of control spool 3 is provided with two sections ring-type indents, and two sections ring-type indents are designated as ring I 3-1, ring II 3-2 from top to bottom respectively; Be provided with the annular chamber of two sections indents in the endoporus of control valve seat 2, two sections annular chambers are designated as chamber I 2-1, chamber II 2-2 from top to bottom respectively; The position relation of ring I 3-1, ring II 3-2, chamber I 2-1, chamber II 2-2 satisfies: when ring I 3-1 and chamber I 2-1 were communicated with, ring II 3-2 and chamber II 2-2 isolated; Ring II 3-2 and chamber II 2-2 were communicated with when ring I 3-1 and chamber I 2-1 isolated; Also be provided with metering oil duct 2-3 and oil input channel 2-4 on the control valve seat 2; The opening of metering oil duct 2-3 bottom is arranged on the lower end surface of control valve seat 2; Metering oil duct 2-3 top is connected with the end of inlet metering hole 2-3-1, and the opening of the inlet metering hole 2-3-1 the other end is arranged on above control valve seat 2 inner hole walls of chamber I 2-1, and is communicated with ring I 3-1; Metering oil duct 2-3 middle part is connected with the end of draining measuring hole 2-3-2, and the opening of the draining measuring hole 2-3-2 the other end is communicated with chamber II 2-2; The opening of oil input channel 2-4 bottom is arranged on the lower end surface of control valve seat 2, and oil input channel 2-4 upper opening place is communicated with chamber I 2-1.
The core body of the control spool 3 at ring II 3-2 place is provided with the draining hole 4 of radially running through core body.
Its working principle is: during the solenoid valve no electric circuit, control spool 3 is under the effect of spring, the core body lower end surface of control spool 3 contacts with oil-feed pad 1, ring I 3-1 on the control valve seat 2 is communicated with chamber I 2-1 on the control valve seat 2, ring II 3-2 and chamber II 2-2 isolate, the circulation of 2-3-1 two ends, inlet metering hole, draining measuring hole 2-3-2 closes, oil input channel 2-4 opens simultaneously, and fuel oil enters oil input channel 2-4 and inflow chamber I 2-1 and the ring I 3-1 from oil suction chamber by oil duct II 1-2, and this moment, chamber I 2-1 and ring I 3-1 formed " hyperbaric chamber ", oil pressure in " hyperbaric chamber " increases, and greater than the oil pressure in the fuel injection chamber, needle-valve is withstood not oil spout;
After the solenoid valve energising, control spool 3 is under the effect of solenoid valve, the active force that overcomes spring moves upward, separate with oil-feed pad 1 the core body lower end surface of control spool 3, ring I 3-1 on the control valve seat 2 and the chamber I 2-1 on the control valve seat 2 isolate, ring II 3-2 is communicated with chamber II 2-2, inlet metering hole 2-3-1 closes, the circulation of draining measuring hole 2-3-2 two ends, oil input channel 2-4 is closed simultaneously, fuel oil in the ring I 3-1 is through inlet metering hole 2-3-1, flow among ring II 3-2 and the chamber II 2-2 behind metering oil duct 2-3 and the draining measuring hole 2-3-2, make " hyperbaric chamber " pressure release, when the oil pressure in " hyperbaric chamber " during less than the oil pressure in the fuel injection chamber, needle-valve is opened, and carries out the oil spout action.
Claims (3)
1. electric-controlled fuel injector control valve structure, it comprises control valve seat (2) and control spool (3), it is characterized in that: the core body of control spool (3) is provided with two sections ring-type indents, and two sections ring-type indents are designated as ring I (3-1), ring II (3-2) from top to bottom respectively; Be provided with the annular chamber of two sections indents in the endoporus of control valve seat (2), two sections annular chambers are designated as chamber I (2-1), chamber II (2-2) from top to bottom respectively; The position relation of ring I (3-1), ring II (3-2), chamber I (2-1), chamber II (2-2) satisfies: when ring I (3-1) and chamber I (2-1) were communicated with, ring II (3-2) and chamber II (2-2) were isolated; Ring II (3-2) and chamber II (2-2) were communicated with when ring I (3-1) and chamber I (2-1) were isolated;
Also be provided with metering oil duct (2-3) and oil input channel (2-4) on the control valve seat (2);
The opening of metering oil duct (2-3) bottom is arranged on the lower end surface of control valve seat (2); Metering oil duct (2-3) top is connected with an end of inlet metering hole (2-3-1), and the opening of inlet metering hole (2-3-1) the other end is arranged on above control valve seat (2) inner hole wall of chamber I (2-1), and is communicated with ring I (3-1); Metering oil duct (2-3) middle part is connected with an end of draining measuring hole (2-3-2), and the opening of draining measuring hole (2-3-2) the other end is communicated with chamber II (2-2);
The opening of oil input channel (2-4) bottom is arranged on the lower end surface of control valve seat (2), and oil input channel (2-4) upper opening place is communicated with chamber I (2-1).
2. electric-controlled fuel injector control valve structure according to claim 1, it is characterized in that: control valve seat (2) bottom is connected with oil-feed pad (1), oil-feed pad (1) is provided with two oil ducts that run through oil-feed pad (1) body, article two, oil duct is designated as oil duct I (1-1), oil duct II (1-2) respectively, and oil duct I (1-1) is communicated with metering oil duct (2-3) and draining chamber; Oil duct II (1-2) is communicated with oil input channel (2-4) and oil suction chamber.
3. electric-controlled fuel injector control valve structure according to claim 1 is characterized in that: the core body of the control spool (3) that ring II (3-2) is located is provided with the draining hole (4) of radially running through core body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010299938XA CN101963118B (en) | 2010-10-08 | 2010-10-08 | Control valve structure of electronically controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010299938XA CN101963118B (en) | 2010-10-08 | 2010-10-08 | Control valve structure of electronically controlled fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101963118A CN101963118A (en) | 2011-02-02 |
| CN101963118B true CN101963118B (en) | 2011-12-14 |
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ID=43516139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010299938XA Expired - Fee Related CN101963118B (en) | 2010-10-08 | 2010-10-08 | Control valve structure of electronically controlled fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101963118B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19742073A1 (en) * | 1997-09-24 | 1999-03-25 | Bosch Gmbh Robert | Fuel injection arrangement for internal combustion engines |
| CN1241243A (en) * | 1997-10-02 | 2000-01-12 | 罗伯特·博施有限公司 | Liquid control valve |
| CN201802534U (en) * | 2010-10-08 | 2011-04-20 | 中国重汽集团重庆燃油喷射系统有限公司 | Control valve structure of electric fuel injector |
-
2010
- 2010-10-08 CN CN201010299938XA patent/CN101963118B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19742073A1 (en) * | 1997-09-24 | 1999-03-25 | Bosch Gmbh Robert | Fuel injection arrangement for internal combustion engines |
| CN1241243A (en) * | 1997-10-02 | 2000-01-12 | 罗伯特·博施有限公司 | Liquid control valve |
| CN201802534U (en) * | 2010-10-08 | 2011-04-20 | 中国重汽集团重庆燃油喷射系统有限公司 | Control valve structure of electric fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101963118A (en) | 2011-02-02 |
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Granted publication date: 20111214 Termination date: 20151008 |
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| EXPY | Termination of patent right or utility model |