CN202611962U - Fuel injection pump plunger sleeve assembly - Google Patents
Fuel injection pump plunger sleeve assembly Download PDFInfo
- Publication number
- CN202611962U CN202611962U CN 201220336597 CN201220336597U CN202611962U CN 202611962 U CN202611962 U CN 202611962U CN 201220336597 CN201220336597 CN 201220336597 CN 201220336597 U CN201220336597 U CN 201220336597U CN 202611962 U CN202611962 U CN 202611962U
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- Prior art keywords
- plunger
- groove
- fuel
- oil
- injection pump
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Abstract
The utility model discloses a fuel injection pump plunger sleeve assembly, which comprises a plunger and a plunger sleeve; the plunger is movably inserted in the plunger sleeve; a fuel feed hole is arranged in the central hole of the upper part of the plunger sleeve, a fuel chamber is slidably mounted in the central hole of the upper part of the plunger sleeve, and when going down to a position, the fuel chamber can cover the fuel feed hole; the plane of the upper end of the plunger is provided with a plunger end surface, and the plunger end surface is tightly matched with the lower end surface of the fuel chamber; the outer wall of the upper end of the plunger is provided with a concave fuel cutoff groove, a concave pilot injection fuel groove, a concave control fuel groove and a concave starting fuel groove, and both the fuel cutoff groove and the pilot injection fuel groove are communicated with the end surface of the plunger; one end of the control fuel groove is communicated with the fuel cutoff groove, and the other end of the control fuel groove is communicated with the starting fuel groove; and the pilot injection fuel groove is arranged to apply the affection of hydraulic power on injection beginning-point control. The design is reasonable, so that the fuel injection pump plunger sleeve assembly can carry out injection at high speed in advance in a diesel engine, and therefore optimal operation values can be obtained in terms of power supply, fuel consumption, emission of exhaust gas and noise and the like.
Description
Technical field
The utility model relates to the technical field of diesel engine part, particularly a kind of plunger and bare of injection pump.
Background technique
In diesel engine; Particularly in the diesel engine of direct injection, adopt single cylinder or multi-cylinder fuel injection pump usually, because compact structure; Except range controlling mechanism and cam drive stroke mechanism, can not comprise the electric or electronic control signal that is used to correct the injection starting point of any kind.If the higher mechanical atomization driver of link cost is not as the input or the feed-forward component of drive unit, and is all infeasible to any known rectification of spraying starting point.
In order to obtain the runtime value of best aspects such as power supply, fuel consumption, waste gas and noise emissions, in diesel engine, must spray in advance at a relatively high speed.For startup, when particularly externally cryogenic conditions starts down, especially true.In this case, initial combustion needs delayed injection to begin, and follow-up not flame-out further operation need be burnt and begun in advance; Simultaneously, the increase along with speed keeps alap hydrocarbon to discharge.Consider space and cost reason, two cylinder diesel engine can not be taked electronic control, because electronic control not only complicacy but also costliness.
Before this, the fuel injection pump that uses on the small diesel engine switches the injection starting point through the method that the chamfered edge on the plug is handled, and the peripheral radial degree of depth of chamfered edge is approximately 0.5% of plunger diameter.But, when batch process, be difficult to guarantee the machining accuracy of product.
All there is shortcoming in said method, promptly sprays the operation injection that switching in of starting point depended between plunger and the plunger bushing to a great extent, and between various velocity ranges, fails to obtain to distinguish.
Summary of the invention
The utility model technical problem to be solved is the present situation to existing technology, provide a kind of reasonable in design, flow process correct, simple operation, operational effect are good, the waste gas noise discharging reaches the good a kind of plunger and bare of injection pump of power supply fuel consumption state less.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of plunger and bare of injection pump, include plunger, plunger bushing, and plunger activity inserting is in plunger bushing, and both can rotate and slide down movement row relatively; Be shaped on oil inlet hole in the intermediate hole of plunger bushing top, sliding in this top intermediate hole is fitted with the grease chamber, and this grease chamber is descending can cover oil inlet hole when putting in place; Transverse plane is provided with the plunger end face on the plunger; Be positioned at and be shaped on the oil-break groove of indent, oil spout groove, control oil groove and start oil groove in advance on the outer wall of plunger upper end, and the oil-break groove, the oil spout groove all connects with the plunger end face in advance; Control oil groove one end is communicated with the oil-break groove, the other end is communicated with the startup oil groove.
The measure of taking also comprises:
The radial depth value scope of above-mentioned preparatory oil spout groove is 1.5% to 4% of a plunger diameter value.
The axial length value scope of above-mentioned preparatory oil spout groove is 8% to 10% of a plunger diameter value.
Above-mentioned preparatory oil spout groove and plunger end face are in a parallel set.
Be formed with angle between above-mentioned preparatory oil spout groove and the plunger end face.
Be formed with angle between above-mentioned control oil groove and the plunger axis, and the other end of control oil groove is downward-sloping.
Above-mentioned startup oil groove is parallel with the plunger end face.
Above-mentioned oil inlet hole diameter is 3 millimeters.
Compared with prior art, the utility model includes plunger, plunger bushing, and plunger activity inserting is in plunger bushing, and both can rotate and slide down movement row relatively; Be shaped on oil inlet hole in the intermediate hole of plunger bushing top, sliding in this top intermediate hole is fitted with the grease chamber, and this grease chamber is descending can cover oil inlet hole when putting in place; Transverse plane is provided with the plunger end face on the plunger; Be positioned at and be shaped on the oil-break groove of indent, oil spout groove, control oil groove and start oil groove in advance on the outer wall of plunger upper end, and the oil-break groove, the oil spout groove all connects with the plunger end face in advance; Control oil groove one end is communicated with the oil-break groove, the other end is communicated with the startup oil groove.The advantage of the utility model is: preparatory oil spout groove is set, and is in order to apply the hydraulic power influence to having sprayed point control; This is reasonable in design, makes plunger and bare of injection pump in diesel engine, to spray in advance at a relatively high speed, thereby obtains the runtime value of best aspects such as power supply, fuel consumption, waste gas and noise emissions; Plunger has an angular position respectively under idle running, partial load and full load operation condition, the plunger end face is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process; Plunger has an angular position in the start-up operation process, the oil spout groove is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process in advance, and flow scheme design is reasonable, simple operation.
Description of drawings
Fig. 1 is a plunger and bare of injection pump erection drawing schematic representation among the utility model embodiment;
Fig. 2 is the partial cross section schematic representation of plunger and bare of injection pump in the utility model;
Fig. 3 is the partly main schematic representation of looking of plunger and bare of injection pump plunger in the utility model;
Fig. 4 is a plunger and bare of injection pump plunger schematic top plan view in the utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Extremely shown in Figure 4 like Fig. 1, the utility model embodiment, a kind of plunger and bare of injection pump includes plunger 11, plunger bushing 1, and plunger 11 activity insertings are in plunger bushing 1, and both can rotate and slide down movement row relatively; Be shaped on oil inlet hole 3 in the plunger bushing 1 top intermediate hole, sliding in this top intermediate hole is fitted with grease chamber 2, and can cover oil inlet hole 3 during this grease chamber 2 descending putting in place; Transverse plane is provided with plunger end face 4 on the plunger 11, is positioned at the oil-break groove 5 that is shaped on indent on the outer wall 6 of plunger 11 upper ends, oil spout groove 7, control oil groove 10 and start oil groove 9 in advance, and oil-break groove 5, in advance oil spout groove 7 all with 4 perforations of plunger end face; Control oil groove 10 1 ends are communicated with oil-break groove 5, the other end is communicated with startup oil groove 9.
The radial depth value scope of oil spout groove 7 is 1.5% to 4% of plunger 11 diameter values in advance.The axial length value scope of oil spout groove 7 is 8% to 10% of plunger 11 diameter values in advance.Preparatory oil spout groove is set, and is in order to apply the hydraulic power influence to having sprayed point control; Plunger has an angular position respectively under idle running, partial load and full load operation condition, the plunger end face is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process; Plunger has an angular position in the start-up operation process, the oil spout groove is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process in advance.
First kind of way of example of preparatory oil spout groove: oil spout groove 7 is in a parallel set with plunger end face 4 in advance.
Second kind of way of example of preparatory oil spout groove: be formed with angle between oil spout groove 7 and the plunger end face 4 in advance.
Be formed with angle between control oil groove 10 and plunger 11 axis, and the other end of control oil groove 10 is downward-sloping.It is parallel with plunger end face 4 to start oil groove 9.
The utility model embodiment's Applicable scope: a kind of plunger and bare of injection pump is applicable to two cylinder diesel engine.
The utility model embodiment's advantage is: preparatory oil spout groove is set, and is in order to apply the hydraulic power influence to having sprayed point control; This is reasonable in design, makes plunger and bare of injection pump in diesel engine, to spray in advance at a relatively high speed, thereby obtains the runtime value of best aspects such as power supply, fuel consumption, waste gas and noise emissions; Plunger has an angular position respectively under idle running, partial load and full load operation condition, the plunger end face is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process; Plunger has an angular position in the start-up operation process, the oil spout groove is overlapping with the oil inlet hole of plunger bushing in the plunger stroke process in advance, and flow scheme design is reasonable, simple operation.
The most preferred embodiment of the utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of the utility model.
Claims (8)
1. a plunger and bare of injection pump includes plunger (11), plunger bushing (1), and described plunger (11) activity inserting is in plunger bushing (1), and both can rotate and slide down movement row relatively; It is characterized in that: be shaped on oil inlet hole (3) in the intermediate hole of described plunger bushing (1) top, sliding in this top intermediate hole is fitted with grease chamber (2), and can cover described oil inlet hole (3) during descending the putting in place in this grease chamber (2); Described plunger (11) is gone up Transverse plane and is provided with plunger end face (4); Be positioned at and be shaped on the oil-break groove (5) of indent, oil spout groove (7), control oil groove (10) and start oil groove (9) in advance on the outer wall (6) of plunger (11) upper end, and oil-break groove (5), preparatory oil spout groove (7) all connect with described plunger end face (4); Described control oil groove (10) one ends are communicated with oil-break groove (5), the other end is communicated with startup oil groove (9).
2. a kind of plunger and bare of injection pump according to claim 1 is characterized in that: the radial depth value scope of described preparatory oil spout groove (7) is 1.5% to 4% of plunger (a 11) diameter value.
3. a kind of plunger and bare of injection pump according to claim 2 is characterized in that: the axial length value scope of described preparatory oil spout groove (7) is 8% to 10% of plunger (a 11) diameter value.
4. a kind of plunger and bare of injection pump according to claim 3 is characterized in that: described preparatory oil spout groove (7) is in a parallel set with plunger end face (4).
5. a kind of plunger and bare of injection pump according to claim 3 is characterized in that: be formed with angle between described preparatory oil spout groove (7) and the plunger end face (4).
6. a kind of plunger and bare of injection pump according to claim 1 is characterized in that: be formed with angle between described control oil groove (10) and plunger (11) axis, and the other end of control oil groove (10) is downward-sloping.
7. a kind of plunger and bare of injection pump according to claim 1 is characterized in that: described startup oil groove (9) is parallel with plunger end face (4).
8. a kind of plunger and bare of injection pump according to claim 1 is characterized in that: described oil inlet hole (3) diameter is 3 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336597 CN202611962U (en) | 2012-07-12 | 2012-07-12 | Fuel injection pump plunger sleeve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336597 CN202611962U (en) | 2012-07-12 | 2012-07-12 | Fuel injection pump plunger sleeve assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611962U true CN202611962U (en) | 2012-12-19 |
Family
ID=47345668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220336597 Expired - Fee Related CN202611962U (en) | 2012-07-12 | 2012-07-12 | Fuel injection pump plunger sleeve assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202611962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067653A (en) * | 2019-04-03 | 2019-07-30 | 陕西渭阳动力技术服务有限责任公司 | A kind of parking device |
-
2012
- 2012-07-12 CN CN 201220336597 patent/CN202611962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067653A (en) * | 2019-04-03 | 2019-07-30 | 陕西渭阳动力技术服务有限责任公司 | A kind of parking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20180712 |