CN2742173Y - Plunger for single cylinder diesel engine oil jet pump - Google Patents
Plunger for single cylinder diesel engine oil jet pump Download PDFInfo
- Publication number
- CN2742173Y CN2742173Y CN 200420108838 CN200420108838U CN2742173Y CN 2742173 Y CN2742173 Y CN 2742173Y CN 200420108838 CN200420108838 CN 200420108838 CN 200420108838 U CN200420108838 U CN 200420108838U CN 2742173 Y CN2742173 Y CN 2742173Y
- Authority
- CN
- China
- Prior art keywords
- plunger
- skewed slot
- plunger piston
- single cylinder
- ring body
- 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 a plunger piston used for the jet pump of single cylinder diesel. The upper portion of the plunger piston is provided with a skewed slot and the axial hole of the plunger piston is interpenetrated with the skewed slot. The top portion of the plunger piston is respectively provided with two slopes outward declined and the space between the two slopes is respectively provided with a transition flat surface and a raised ring body. The place close to the skewed slot and positioned on the maximum oil quantity point is provided with intersect straight flutes and the height from the top surface of the ring body to the top portions of the straight flutes is between 6. 0 mm to 8. 5 mm. By conducting optimum design to the plunger piston, and in the condition that the starting performance is guaranteed, the utility model can vary with the loading rotating speed of the diesel and automatically changes the oil supplying advance angle and reduces the nitride discharging to satisfy the requirements of high performance and low discharging of the diesel.
Description
Technical field
The utility model relates to a kind of plunger coupled parts of diesel injection pump, especially relates to a kind of single cylinder diesel Injection Pump plunger.
Background technique
Present domestic single cylinder diesel exists emitting nitride and exceeds standard and the higher problem of noise, and Injection Pump is as the part of oil supply system, and its effect is the different operating modes according to diesel engine, regularly, quantitatively fuel oil is sprayed in the cylinder with certain pressure.Plunger coupled parts is as the core part of Injection Pump, and the plunger of traditional single cylinder diesel is a smooth cylindrical body, is provided with skewed slot on the top of plunger, plays the fuel delivery effect of regulating by plunger with respect to the oil inlet and oil return hole site of sleeve.Though can reduce the concentration of inflammable mixture in the delay period by reducing fuel supply advance angle, shorten combustion gas in the high-temperature oxygen-enriched time that stops down, reducing the growing amount of nitrogen oxide, but because after fuel supply advance angle postpones, just make the starting performance variation, low-speed performance is variation also, easily produces black smoke.Whether nominal power and maximum torque point performance can be taken into account in addition, also are the scabrous problems of single cylinder diesel.
Summary of the invention
The purpose of this utility model provides a kind of single cylinder diesel Injection Pump plunger, under the prerequisite that guarantees starting performance, with the diesel load rotation speed change, changes fuel supply advance angle automatically, satisfies the requirement of diesel engine high-performance, low emission.
The utility model is that the technological scheme that achieves the above object is: a kind of single cylinder diesel Injection Pump plunger, described plunger upper part has skewed slot, and the axial bore of plunger and skewed slot connect, be respectively equipped with two inclined-planes that outwards have a down dip at the top of plunger, and the ring body that between two inclined-planes, has transition plane and projection respectively, be positioned at oil mass maximum position place near skewed slot and be provided with crossing straight trough, the height D at ring body end face and straight trough top is at 6.0mm～8.5mm.
The utility model is filled in the design that row is optimized performance by coupled columns, transition plane between two inclined-planes that outwards have a down dip of plunger head design and two inclined-planes, when finishing the fuel feeding function of measuring with skewed slot, fuel supply advance angle can be changed along with the variation of diesel engine condition, automatically change fuel supply advance angle, guarantee the promptness of burning, reduce the discharging of nitride.The ring body of the utility model plunger head cooperates with the straight trough that skewed slot intersects, and when diesel engine starting, when guaranteeing enough fuel deliveries, increases fuel supply advance angle, postpones the starting difficulty problem that fuel supply advance angle brings thereby solved to reducing discharging.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the sectional structure schematic representation of the A-A of Fig. 1.
Fig. 3 is the plan structure schematic representation of Fig. 1.
Wherein: the 1-plunger; The 1-1-annular groove; The 1-2-axial bore; The 1-3-skewed slot; The 1-4-straight trough; The 1-5-ring body; The 1-6-inclined-plane; The 1-7-inclined-plane; The 1-8-transition plane; The 2-sleeve; 2-1-oil inlet and oil return hole;
Embodiment
Single cylinder diesel Injection Pump plunger as Figure 1-3, this plunger 1 are smooth cylindrical bodys, the plunger 1 formation trunk piston set that matches with sleeve 2, and sleeve 2 is provided with oil inlet and oil return hole 2-1.The skewed slot 1-3 that the utility model has on the top of plunger 1, and the axial bore 1-2 of plunger 1 and skewed slot 1-3 connect, 1-3 controls fuel injection quantity by this skewed slot, also is provided with the annular groove 1-1 of oil storage on plunger 1, and the bottom of plunger 1 also has the cooperation shaft part that is connected with rocking arm.The utility model is optimized plunger 1, be respectively equipped with two inclined-plane 1-7,1-6 that outwards have a down dip at the top of plunger 1, the ring body 1-5 that between two inclined-plane 1-7,1-6, has transition plane 1-8 and projection again respectively, when finishing the fuel feeding function of measuring with transition plane 1-8 with skewed slot 1-3 by inclined-plane 1-7,1-6, fuel supply advance angle can be changed along with the variation of diesel engine condition, change fuel supply advance angle automatically.Be positioned at oil mass maximum position place near skewed slot 1-3 and be provided with crossing straight trough 1-4, the height D at ring body 1-5 end face and straight trough 1-4 top is at 6.0mm～8.5mm, the utility model can cooperate with straight trough 1-4 by the ring body 1-5 at plunger 1 top, when making diesel engine starting, when guaranteeing enough fuel deliveries, increase fuel supply advance angle.
The included angle B of seeing the inclined-plane 1-7 at plunger of the present utility model shown in Figure 11 top and transition plane 1-8 is between 12 °～20 °, and the included angle A of another inclined-plane 1-6 and transition plane 1-8 is between 10 °～20 °, and the height C of ring body 1-5 end face and transition plane 1-8 is between 0.8～2.0mm.
The utility model is filled in capable optimal design by coupled columns, can play automatic change fuel supply advance angle with the diesel load rotation speed change, reduces the discharging of nitride, satisfies the requirement of diesel engine high-performance, low emission.
Claims (3)
1, a kind of single cylinder diesel Injection Pump plunger, described plunger (1) top has skewed slot (1-3), and the axial bore (1-2) of plunger (1) connects with skewed slot (1-3), it is characterized in that: be respectively equipped with two inclined-planes that outwards have a down dip (1-7) at the top of plunger (1), (1-6), and on two inclined-planes (1-7), the ring body (1-5) that has transition plane (1-8) and projection (1-6) respectively, be positioned at oil mass maximum position place near skewed slot (1-3) and be provided with crossing straight trough (1-4), the height D at ring body (1-5) end face and straight trough (1-4) top is at 6.0mm～8.5mm.
2, single cylinder diesel Injection Pump plunger according to claim 1, it is characterized in that: the included angle A of described inclined-plane (1-6) and transition plane (1-8) is between 10 °～20 °, and the included angle B of inclined-plane (1-7) and transition plane (1-8) is between 12 °～20 °.
3, single cylinder diesel Injection Pump plunger according to claim 1 is characterized in that: the height C of described ring body (1-5) end face and transition plane (1-8) is between 0.8～2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420108838 CN2742173Y (en) | 2004-11-17 | 2004-11-17 | Plunger for single cylinder diesel engine oil jet pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420108838 CN2742173Y (en) | 2004-11-17 | 2004-11-17 | Plunger for single cylinder diesel engine oil jet pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742173Y true CN2742173Y (en) | 2005-11-23 |
Family
ID=35477642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420108838 Expired - Lifetime CN2742173Y (en) | 2004-11-17 | 2004-11-17 | Plunger for single cylinder diesel engine oil jet pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2742173Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010127613A1 (en) * | 2009-05-04 | 2010-11-11 | Hong Xuanmin | In-line fuel pump plunger for diesel engine |
| CN102767454A (en) * | 2012-07-13 | 2012-11-07 | 无锡凯奥动力机械有限公司 | Fuel supply advance angle regulation device for fuel injection pump of single-cylinder diesel engine |
| CN104819058A (en) * | 2015-05-08 | 2015-08-05 | 洪宝童 | Energy-saving multi-cylinder engine and oil injection method thereof |
| CN107387280A (en) * | 2017-09-12 | 2017-11-24 | 重庆潍柴发动机有限公司 | Injection pump and diesel engine |
-
2004
- 2004-11-17 CN CN 200420108838 patent/CN2742173Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010127613A1 (en) * | 2009-05-04 | 2010-11-11 | Hong Xuanmin | In-line fuel pump plunger for diesel engine |
| CN102767454A (en) * | 2012-07-13 | 2012-11-07 | 无锡凯奥动力机械有限公司 | Fuel supply advance angle regulation device for fuel injection pump of single-cylinder diesel engine |
| CN104819058A (en) * | 2015-05-08 | 2015-08-05 | 洪宝童 | Energy-saving multi-cylinder engine and oil injection method thereof |
| CN107387280A (en) * | 2017-09-12 | 2017-11-24 | 重庆潍柴发动机有限公司 | Injection pump and diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141117 Granted publication date: 20051123 |