CN2837540Y - In-line fuel injection pump with detachable damping valve - Google Patents
In-line fuel injection pump with detachable damping valve Download PDFInfo
- Publication number
- CN2837540Y CN2837540Y CN 200520070936 CN200520070936U CN2837540Y CN 2837540 Y CN2837540 Y CN 2837540Y CN 200520070936 CN200520070936 CN 200520070936 CN 200520070936 U CN200520070936 U CN 200520070936U CN 2837540 Y CN2837540 Y CN 2837540Y
- Authority
- CN
- China
- Prior art keywords
- damping
- damping valve
- injection pump
- orifice valve
- fuel injection
- 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 - Fee Related
Links
- 238000013016 damping Methods 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 208000004141 microcephaly Diseases 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to an in-line arrangement injection pump for diesel engine, damping valve are detachable, and damping valve connects (1) and directly presses damping pad (5) and sealed pad (6) at delivery valve joint (7) inner chamber through the screw coupling, and delivery valve joint (7) screw thread head is sealed with "O" type sealing washer (3). The inner circle of the damping valve joint (1) is provided with a step hole which is in clearance fit with the outer circle of the damping valve spring (2) and the large circle of the damping valve core (4). The damping valve pad (5) is a hardened gasket with two parallel and smooth planes, the damping valve core (4) comprises a 120-degree inner cone and damping small holes with phi of 0.5-phi 0.7mm, and the damping valve structure reduces the fluctuation of residual pressure in a high-pressure oil path of the fuel injection pump, is convenient for the fuel injection pump to improve the pressure at the pump end, enlarges the working capacity, meets the requirements of improving the power of a diesel engine and reducing the matching requirements of emission, has simple structure and reliable quality, and is suitable for batch production.
Description
(1) technical field
The utility model relates to a kind of use for diesel engine in-line fuel injection pump.
(2) background technique
Diesel engine improves power per cylinder for meeting the market requirement by expanding measures such as cylinder, increasing stroke at present.The fuel injection pump is the critical component of diesel engine, its effect be according to the different applying working conditions of diesel engine with a certain amount of fuel oil, improve pressure, according to the rules time and fuel injection characteristic infeed cylinder.In order to satisfy the requirement that diesel engine improves power, Injection Pump is by strengthening plunger, strengthening cam lift to improve oil-supply speed and pump end pressure, reasons such as compressibility owing to fuel oil, the fuel oil of Injection Pump ejection needle-valve under main injection end needle-valve is taken a seat the effect of back at reflected wave is opened once more and is carried out oil spout, claims secondary injection traditionally.Secondary injection prolongs whole discharge time and makes diesel engine row temperature rise, and smoke intensity increases.The key of eliminating secondary injection is to reduce the fuel pressure fluctuation of high-pressure oil passage, and adopting orifice valve is efficient ways.The 27th page of " application of orifice valve on in-line fuel injection pump " literary composition of 2002 the 1st phases " modern power train in vehicle application " magazine, the tight seat of orifice valve is tightened by screw thread and the tight cap of outlet valve, to guarantee that also damping valve seat and damping lower valve seat fit tightly when must guarantee sealing, reaching this point must make the tight seat of the orifice valve inner chamber degree of depth equal seat stand rank height sum under damping valve seat height and the orifice valve, in batch process, even the relative dimensions to above three parts improves dimension precision requirement, still accumulate machining error unavoidably, also must match during assembling, manufacture cost is risen.
(3) summary of the invention
In order to overcome above-mentioned defective, the utility model provides a kind of detachable orifice valve of simple in structure, easy to process, reliable performance, be used for in-line fuel injection pump, pressure surge in the high-pressure oil passage is reduced, improve pump end pressure expansion ability to work thereby be convenient to Injection Pump, satisfy the supporting requirement that the diesel engine hoisting power reduces discharging.
Structure of the present utility model is such, the in-line fuel injection pump assembly is equipped with detachable orifice valve, form by discharge outlet (7), damping spool (4), orifice valve spring (2), damping valve pad (5), orifice valve joint (1) and " O " RunddichtringO (3) etc., damping valve pad (5) is a cylindrical body, there is an endoporus at the center, and diameter of bore is greater than the endoporus of damping spool (4).Orifice valve joint (1) one end outside thread links to each other with discharge outlet (7) internal thread, be pressed on the damping valve pad (5), " O " RunddichtringO (3) is installed between orifice valve joint (1) and the discharge outlet (7), the interior circle of orifice valve joint (1) has the step hole with orifice valve spring (2) cylindrical and damping spool (4) cylindrical Spielpassung, and the asphalt channel of two symmetries is arranged.Damping spool (4) is a step type cylindrical body, and a damping endoporus and an inner cone arranged, diameter of bore Φ 0.5～Φ 0.7mm.Damping spool (4) microcephaly's body diameter and orifice valve spring (2) internal diameter Spielpassung, damping spool (4) major part body diameter is greater than orifice valve spring (2) external diameter.
The beneficial effects of the utility model are that orifice valve is detachable, and are simple in structure, reliable in quality, suitable batch production.
(4) description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Figure one is detachable orifice valve discharge outlet component diagram.
Figure two is in-line fuel injection pump schematic representation of detachable orifice valve.
Among the figure: 1. orifice valve joint 2. orifice valve spring 3. " O " RunddichtringOs 4. damping spools 5. damping valve pads 6. sealing gaskets 7. discharge outlets 8. subtract container 9. oil outlet valve springs 10. outlet valves 11. plungers 12. piston springs 13. tappet body assemblies 14. cams 15. fuel injection pump housings
(5) embodiment
Embodiment:
In Fig. 1, dismountable orifice valve structure is housed in the discharge outlet (7), orifice valve joint (1) directly is pressed on discharge outlet (7) inner chamber with damping valve pad (5) and sealing gasket (6) by being threaded, and discharge outlet (7) screw head seals with " O " RunddichtringO (3).Damping valve pad (5) be one harden have two plane-parallel packing rings, its effect is the damping lower valve seat, damping spool (4) contains inner cone and damping hole, hole diameter Φ 0.5～Φ 0.7mm selects for use.Orifice valve joint (1) external screw-thread one end connects discharge outlet (7), the other end connects high-pressure oil pipe, circle has the mounting hole of orifice valve spring (2) and the active chamber of damping spool (4) in the orifice valve joint (1), the high-pressure oil duct that two symmetries are arranged simultaneously in addition, for damping spool (4) when lifting high pressure oil enter high-pressure oil pipe fast.
In Fig. 2, when cam (14) rises, the pressure that the high pressure oil that tappet body assembly (13) jack-up plunger (11) is discharged overcomes oil outlet valve spring (9) is opened outlet valve and is entered the damping valve pocket, the pressure that overcomes orifice valve spring (2) lifts damping spool (4), high pressure oil passes through two symmetrical asphalt channels of orifice valve joint inner chamber through high-pressure oil pipe, oil sprayer (not shown), to the cylinder of diesel engine fuel feeding.When the fuel feeding end, oil-fuel injector needle-valve is closed, and also closes simultaneously under the effect of outlet valve and orifice valve residual high pressure oil in spring and high-pressure oil passage.Because the damping spool is divided into two sections with high-pressure oil passage, the residual high pressure oil of fuel-displaced valve pocket reduces oil pressure because of the effect of fuel-displaced spool decompression flange, and the residual high pressure oil in the above oil circuit of damping spool must just can enter the lower fuel-displaced valve pocket of pressure through the aperture of damping spool.Like this because the throttling action of aperture makes high-pressure oil pipe pressure surge in the high-pressure oil passage of oil sprayer little, thereby avoided secondary injection.
Use the in-line fuel injection pump of detachable orifice valve to join the NT6135ZLCzU diesel engine and compare test in Nantong diesel engine Co., Ltd, this machine nominal power 280kw (380.8Ps), power per cylinder 46.67kw (63.67Ps), the Injection Pump that test result is joined detachable orifice valve improves than original traditional Injection Pump smoke intensity, row temperature obviously reduces, and satisfied the supporting requirement that the diesel engine hoisting power improves performance.
Claims (4)
1, a kind of in-line fuel injection pump of detachable orifice valve, comprise discharge outlet (7), damping spool (4), orifice valve spring (2), it is characterized in that: also comprise damping valve pad (5), orifice valve joint (1) and " O " RunddichtringO (3), described damping valve pad (5) is a cylindrical body, there is an endoporus at the center, and described diameter of bore is greater than the endoporus of described damping spool (4).
2, the in-line fuel injection pump of detachable orifice valve according to claim 1, it is characterized in that: described orifice valve joint (1) one end outside thread links to each other with described discharge outlet (7) internal thread, be pressed on the described damping valve pad (5), described " O " RunddichtringO (3) is installed between described orifice valve joint (1) and the described discharge outlet (7).
3, the in-line fuel injection pump of detachable orifice valve according to claim 1 is characterized in that: described damping spool (4) is a step type cylindrical body, and a damping endoporus and an inner cone arranged, described diameter of bore Φ 0.5～Φ 0.7mm.
4, the in-line fuel injection pump of detachable orifice valve according to claim 3, it is characterized in that: described damping spool (4) microcephaly's body diameter and described orifice valve spring (2) internal diameter Spielpassung, described damping spool (4) major part body diameter is greater than described orifice valve spring (2) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520070936 CN2837540Y (en) | 2005-04-20 | 2005-04-20 | In-line fuel injection pump with detachable damping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520070936 CN2837540Y (en) | 2005-04-20 | 2005-04-20 | In-line fuel injection pump with detachable damping valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2837540Y true CN2837540Y (en) | 2006-11-15 |
Family
ID=37392025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520070936 Expired - Fee Related CN2837540Y (en) | 2005-04-20 | 2005-04-20 | In-line fuel injection pump with detachable damping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2837540Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478443A (en) * | 2010-11-26 | 2012-05-30 | 中国北车集团大连机车车辆有限公司 | Measurement filter for fuel pressure of diesel engine |
-
2005
- 2005-04-20 CN CN 200520070936 patent/CN2837540Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478443A (en) * | 2010-11-26 | 2012-05-30 | 中国北车集团大连机车车辆有限公司 | Measurement filter for fuel pressure of 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061115 |