CN202746076U - Initial position adjusting mechanism of control valve core - Google Patents
Initial position adjusting mechanism of control valve core Download PDFInfo
- Publication number
- CN202746076U CN202746076U CN 201220346688 CN201220346688U CN202746076U CN 202746076 U CN202746076 U CN 202746076U CN 201220346688 CN201220346688 CN 201220346688 CN 201220346688 U CN201220346688 U CN 201220346688U CN 202746076 U CN202746076 U CN 202746076U
- Authority
- CN
- China
- Prior art keywords
- adjusting screw
- initial position
- metering valve
- push rod
- control spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an initial position adjusting mechanism of a control valve core. The mechanism comprises an adjusting screw (1); the adjusting screw (1) is connected with a shell (4) of a fuel oil metering valve in a penetrating manner; one end, which stretches into the shell (4), of the adjusting screw (1) is contacted with the head of a push rod (5) of a movable iron core assembly on the fuel oil metering valve; the tail part of the push rod (5) is contacted with a control valve core (6) in a control valve base (7) on the fuel oil metering valve; and the central axis of the adjusting screw (1) and the central axis of the push rod (5) are on a same straight line. The initial position adjusting mechanism of the control valve core can effectively improve the control precision of the fuel oil metering valve.
Description
Technical field
The utility model relates to a kind of controlling mechanism, especially relates to a kind of mechanism on the fuel metering valve of diesel electric-controlled high-pressure common-rail oil pump the initial position of control spool being regulated, and belongs to diesel electric-controlled common rail system technical field.
Background technique
Fuel metering valve is final controlling element important in the diesel electric-controlled high-pressure common-rail oil pump, according to the ECU instruction, use the driving current of PWM regulating and controlling fuel metering valve, and then the displacement of change control spool, regulate the oil inlet quantity that enters the high pressure oil pump plunger cavity with this, thereby the pressure to the high-pressure common rail pipeline plays a part stable and adjusting, therefore needs control spool initial position accurately unified.
At present, the fuel metering valve that diesel electric-controlled high-pressure common-rail oil pump is used mainly contains the companies such as German BOSCH, German SIEMENS, U.S. DELPHI, Japanese DENSO and produces, the control spool of conventional fuel metering valve is unadjustable, contact with the control spool with push rod one end of the contacted moving core assembly of control spool, the other end directly is against on the fuel metering valve housing, thereby for the control spool of mounted fuel metering valve, its initial position can't be regulated, and can only be guaranteed by the machining accuracy of each parts; But, because the influenced factor of initial position of control spool is many, to make integrating error larger in addition, so can't guarantee that the initial position of all control spools is in same initial position, if the initial position of control spool is inconsistent, will have influence on the initial actuation time of fuel metering valve, namely driving current does not get up corresponding with the relation of flow, thereby have influence on the usability of fuel metering valve, affect its control accuracy.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of control spool initial position regulating mechanism that can Effective Raise fuel metering valve control accuracy is provided.
The purpose of this utility model is achieved in that a kind of control spool initial position regulating mechanism, described mechanism includes adjusting screw, described adjusting screw cross-under is on the fuel metering valve housing, described adjusting screw is stretched the head that moves the push rod of core assembly on the end that places in the housing and the fuel metering valve and is contacted, control spool on the afterbody of described push rod and the fuel metering valve in the control valve seat contacts, and the central shaft of described adjusting screw and the central shaft of push rod are on same straight line.
The utility model control spool initial position regulating mechanism is provided with screw on the described housing, and described adjusting screw is spun in this screw.
The utility model control spool initial position regulating mechanism be set with a seal ring on the described adjusting screw, and the sealing circle is between the screw inner hole wall of adjusting screw and housing.
The utility model control spool initial position regulating mechanism, the end face of the end of described adjusting screw outside housing has straight groove.
The utility model control spool initial position regulating mechanism, the end of described adjusting screw outside housing is set with a retainer nut.
Compared with prior art, the beneficial effects of the utility model are:
The utility model has installed adjusting screw additional, push rod by moving core assembly is regulated the initial position of control spool, therefore the initial position of the control spool of the product that dispatches from the factory can be adjusted to the same position place, thereby so that its control accuracy is higher, the conformity of product is also better, has greatly improved the quality of product.
Description of drawings
Fig. 1 is the structural representation of the utility model control spool initial position regulating mechanism.
Fig. 2 is the structural representation of the control spool of the utility model control spool initial position regulating mechanism.
Wherein:
Adjusting screw 1, retainer nut 2, seal ring 3, housing 4, push rod 5, control spool 6, control valve seat 7.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of control spool initial position regulating mechanism that the utility model relates to, described mechanism includes adjusting screw 1, described adjusting screw 1 cross-under is (concrete on fuel metering valve housing 4, be provided with screw on the described housing 4, described adjusting screw 1 is spun in this screw), described adjusting screw 1 is stretched the head that moves the push rod 5 of core assembly on the end that places in the housing 4 and the fuel metering valve and is contacted, control spool 6 on the afterbody of described push rod 5 and the fuel metering valve in the control valve seat 7 contacts, the central shaft of the central shaft of described adjusting screw 1 and push rod 5 is on same straight line, the end face of the end of described adjusting screw 1 outside housing 4 has straight groove, and the end of described adjusting screw 1 outside housing 4 is set with a retainer nut 2, be set with a seal ring 3 on the described adjusting screw 1, and sealing circle 3 is used for preventing that fuel metering valve from producing race and emitting the drip phenomenon between the screw inner hole wall of adjusting screw 1 and housing 4.
After fuel metering valve is finished manufacturing, can rotate adjusting screw 1 by straight screwdriver, thereby can carry out move left and right by the push rod 5 that adjusting screw 1 promotes moving core assembly, can under the promotion of push rod 5, realize the adjusting of initial position with push rod 5 contacted control spools 6.
Claims (5)
1. control the spool initial position regulating mechanism for one kind, it is characterized in that: described mechanism includes adjusting screw (1), described adjusting screw (1) cross-under is on fuel metering valve housing (4), described adjusting screw (1) is stretched the head that moves the push rod (5) of core assembly on the end that places in the housing (4) and the fuel metering valve and is contacted, control spool (6) on the afterbody of described push rod (5) and the fuel metering valve in the control valve seat (7) contacts, and the central shaft of the central shaft of described adjusting screw (1) and push rod (5) is on same straight line.
2. a kind of control spool initial position regulating mechanism as claimed in claim 1, it is characterized in that: described housing is provided with screw on (4), and described adjusting screw (1) is spun in this screw.
3. a kind of control spool initial position regulating mechanism as claimed in claim 2 is characterized in that: be set with a seal ring (3) on the described adjusting screw (1), and sealing circle (3) is positioned between the screw inner hole wall of adjusting screw (1) and housing (4).
4. a kind of control spool initial position regulating mechanism as claimed in claim 1 or 2, it is characterized in that: the end face of the end of described adjusting screw (1) outside housing (4) has straight groove.
5. a kind of control spool initial position regulating mechanism as claimed in claim 1 or 2, it is characterized in that: the end of described adjusting screw (1) outside housing (4) is set with a retainer nut (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346688 CN202746076U (en) | 2012-07-18 | 2012-07-18 | Initial position adjusting mechanism of control valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346688 CN202746076U (en) | 2012-07-18 | 2012-07-18 | Initial position adjusting mechanism of control valve core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746076U true CN202746076U (en) | 2013-02-20 |
Family
ID=47705480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220346688 Expired - Lifetime CN202746076U (en) | 2012-07-18 | 2012-07-18 | Initial position adjusting mechanism of control valve core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746076U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014722A (en) * | 2016-05-25 | 2016-10-12 | 中国第汽车股份有限公司无锡油泵油嘴研究所 | Electronic control fuel pump |
-
2012
- 2012-07-18 CN CN 201220346688 patent/CN202746076U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014722A (en) * | 2016-05-25 | 2016-10-12 | 中国第汽车股份有限公司无锡油泵油嘴研究所 | Electronic control fuel pump |
| CN106014722B (en) * | 2016-05-25 | 2018-07-24 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of electronic controlled fuel pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |