CN104728008A - Fuel injection pump - Google Patents
Fuel injection pump Download PDFInfo
- Publication number
- CN104728008A CN104728008A CN201410800922.0A CN201410800922A CN104728008A CN 104728008 A CN104728008 A CN 104728008A CN 201410800922 A CN201410800922 A CN 201410800922A CN 104728008 A CN104728008 A CN 104728008A
- Authority
- CN
- China
- Prior art keywords
- fuel
- cylinder assembly
- injection pump
- perforation
- dynamic sealing
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000000314 lubricant Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to an improved fuel injection pump for an internal combustion engine. The fuel injection pump according to the present invention comprises a fuel pump casing (106), a cylinder device (101) accommodated in the fuel pump casing (106), a piston (100) in the cylinder device (101), a through hole (104) with a first end (104(a)) connected to the cylinder device (101), and an annular groove (107) formed in the cylinder device (101). The annular groove (107) is formed in the inner diameter of the cylinder device (101) and connected to the first end (104(a)) of the through hole (104). A second end (104(b)) of the through hole (104) is connected to a fuel inlet (105) , and the fuel inlet (105) supplies the fuel to the cylinder device (101).
Description
Technical field
The present invention relates to a kind of fuel-injection pump of the improvement for internal-combustion engine, and the fuel-injection pump mixed mutually of the fuel relating more specifically to be configured to reduce to greatest extent in it and lubricant oil.
Background technique
Environmental contaminants cause primarily of the harmful matter release in air, water and soil.Automotive (comprising automobile, motorcycle, motor bus, Truck, Airplane, Boat oceangoing ship etc.), manufacturing and power station are the significant contributor of environmental contaminants, they release harmful gas in atmosphere, and poisonous and refuse that is nonbiodegradable are discharged in water and soil.The environmental pollution caused by the noxious gas emission in air, except global warming, also results in various environment and health hazard, and therefore causes worldwide concern.
The government of most countries introduces pollution control policy, and it is applied with standardized discharge criterion to automotive.Automotive manufacturer is limited by this type of pollution control policy, and needs to control them to air, the available gas of water and soil release and the amount of other toxic waste.When not meeting standardized pollution criterion, suitable punishment can be imposed to them, such as, fine.
At internal-combustion engine as in conventional diesel engines, fuel-injection pump be used for fuel injection system, with by fuel with desired amount and to expect that pressure injection is in firing chamber.Conventional fuel jet pump is made up of the piston be slidably mounted in cylinder.Piston obtains the Mechanical Driven (for compressed fuel) from tappet, and tappet is driven by cam mechanism, and cam mechanism is driven by engine crankshaft again then.The movable part of cam mechanism and tappet is by engine lubrication oil lubrication, and lubricant oil causes lubricant mist to be deposited on piston, and it mixes with fuel further due to the to-and-fro motion of piston.As a result, the fuel be pumped in firing chamber will have the lubricant oil mixed in fuel, and this causes higher discharge.In addition, the regeneration period (diesel particulate filter such as, in diesel engine) being placed in the particulate filter of vent systems shortens due to a large amount of particle in exhaust and coal ash.
There is the fuel-injection pump device of many prior aries, it attempts solving defect mentioned above.A such device is shown in Figure 1.As shown in fig. 1, dynamic sealing 103 is arranged in the working gap between piston 100 and cylinder assembly 101.Dynamic sealing 103 is by means of elastic excitation device constantly compaction piston 100.The top side of dynamic sealing 103 is connected on fuel inlet 105 by perforation 104.Fuel leakage via the working gap between piston 100 and cylinder assembly 101 sends it back fuel inlet 105 via perforation 104.Therefore, dynamic sealing prevents oil leak from arriving fuel-side, and prevents fuel leakage to lubricant oil side.
There is some inherent defect in the device of prior art mentioned above.At fuel pump inlet valve duration of work, pressure peak generates at fuel pump inlet 105 place.When pressure peak raises, due to bore a hole 104 position, therefore to increase through the leakage of dynamic sealing 103.In addition, the temperature of fuel leakage sharply increases near dynamic sealing 103 due to the adiabatic expansion through the narrow working gap piston 100 and cylinder assembly 101.Be exposed to the rigidity that high temperature roughly reduces dynamic sealing 103, and the leakage that result passes it increases further.
Therefore, by very useful be that there is a kind of fuel-injection pump, it reduces pressure surge near dynamic sealing to greatest extent and temperature raises, and also avoid other defect/deficiency of the prior art.
Summary of the invention
An embodiment provides a kind of fuel-injection pump, comprising: shell of fuel pump; Cylinder assembly in described shell of fuel pump; Be placed in the piston in described cylinder assembly slidably, make annular space be formed between described piston and described cylinder assembly; The feature of described fuel-injection pump is to have the perforation of the first end be connected on described cylinder assembly, and is formed in the annular groove on the internal diameter of described cylinder assembly, and described annular groove is connected on the first end of described perforation.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, wherein said cylinder assembly comprises the cylinder barrel inserted in described shell of fuel pump.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, wherein said cylinder assembly entirety is attached on described shell of fuel pump.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, wherein said fuel-injection pump also comprises the dynamic sealing be arranged in described annular space, described dynamic sealing have to seal with described piston and described cylinder assembly be communicated with its at least partially.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, the first end of wherein said perforation is connected on the cylinder assembly above described dynamic sealing.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, wherein said perforation has its second end be connected on fuel inlet, and described fuel inlet supplies fuel to described cylinder assembly.
The fuel-injection pump provided according to the abovementioned embodiments of the present invention, wherein said perforation also comprises first portion and second portion, make described first portion through described cylinder assembly, and described second portion is through described shell of fuel pump.
Accompanying drawing explanation
Here hereinafter together with drawings describing the present invention, accompanying drawing provides by means of only illustrated mode, and does not therefore limit the present invention, and in the accompanying drawings:
Fig. 1 is the cross sectional view of conventional fuel jet pump.
Fig. 2 is the cross sectional view according to fuel-injection pump of the present invention.
Fig. 3 is the amplification cross sectional view of cylinder assembly of the present invention.
List of parts
100: piston
101: cylinder assembly
103: dynamic sealing
104: perforation
104 (a): the first end of perforation
104 (b): the second end of perforation
105: fuel inlet
106: shell of fuel pump
107: annular groove.
Embodiment
Describe hereinafter with reference to accompanying drawing according to fuel-injection pump of the present invention.Identical reference number is in all of the figs for representing similar characteristic sum component.
Referring to Fig. 2 and 3, fuel-injection pump according to the present invention comprises shell of fuel pump 106, the cylinder assembly 101 be contained in shell of fuel pump 106, and is placed in the piston 100 in cylinder assembly 101 slidably.Annular working space is formed between piston 100 and cylinder assembly 101.In a preferred embodiment of the invention, cylinder assembly 101 comprises the cylinder barrel inserted in shell of fuel pump 106.In another preferred embodiment of the present invention, cylinder assembly 101 combines with shell of fuel pump 106 entirety.The dynamic sealing 103 being placed in annular working space and piston 100 seal with cylinder assembly 101 and are communicated with.Cylinder assembly 101 is connected on the fuel inlet 105 of fuel-injection pump by perforation 104.The invention is characterized in the annular groove 107 on the cylinder assembly 101 that is formed in above dynamic sealing 103, and there is the perforation 104 of the first end 104 (a) on the cylinder assembly 101 that is connected to above dynamic sealing 103.Annular groove 107 is formed in the internal diameter of cylinder assembly 101, and is connected on the first end 104 (a) of perforation 104.Second end 104 (b) of perforation is connected on fuel inlet 105.Perforation 104 also comprises first end 104 (c) and the second end 104 (d).First end 104 (c) is through cylinder assembly 101, and the second end 104 (d) is through shell of fuel pump 106.
The annular groove 107 of perforation 104 and the position of first end 104 (a) allow the high-temperature fuel through annular working space to leak and sent it back fuel inlet 105 before it arrive dynamic sealing district.Fuel leakage sends it back fuel inlet 105 via annular groove 107, and annular groove 107 is connected to again in perforation 104 as previously described then.Pressure peak in fuel inlet 105, due to the position of boring a hole on the cylinder assembly 101 of first end 104 (a) above dynamic sealing 103 of 104, also can not be experienced at place of dynamic sealing district.The annular space of first end 104 (a) below of perforation 104 act as throttling element, because this reducing the effect of pressure peak on dynamic sealing 103.
Therefore, the present invention raises and the leakage that reduces to greatest extent through dynamic sealing by preventing the temperature in pressure surge and dynamic sealing district.Therefore, fuel and the mutual of lubricant oil is prevented to mix.As a result, there is the larger minimizing of motor discharge.In addition, improve significantly the working life of dynamic sealing and exhaust gas particulate filter.
Because described herein the present invention, it will be clear that it can change in many ways.This change is not construed to be departed from the spirit and scope of the present invention, and this type of remodeling clearly all is intended to be included in the scope of following claim by those skilled in the art.
Claims (7)
1. a fuel-injection pump, comprising:
Shell of fuel pump (106);
Cylinder assembly (101) in described shell of fuel pump (106);
Be placed in the piston (100) in described cylinder assembly (101) slidably, make annular space be formed between described piston (100) and described cylinder assembly (101);
The feature of described fuel-injection pump is to have the perforation (104) of the first end (104 (a)) be connected on described cylinder assembly (101), and the annular groove (107) be formed on the internal diameter of described cylinder assembly (101), described annular groove (107) is connected on the first end (104 (a)) of described perforation (104).
2. fuel-injection pump according to claim 1, is characterized in that, described cylinder assembly (104) comprises the cylinder barrel inserted in described shell of fuel pump (106).
3. fuel-injection pump according to claim 1, is characterized in that, described cylinder assembly (104) entirety is attached on described shell of fuel pump (106).
4. fuel-injection pump according to claim 1, it is characterized in that, described fuel-injection pump also comprises the dynamic sealing (103) be arranged in described annular space, described dynamic sealing (103) have to seal with described piston (100) and described cylinder assembly (101) be communicated with its at least partially.
5. fuel-injection pump according to claim 4, is characterized in that, the first end (104(a) of described perforation (104)) be connected on the cylinder assembly (101) of described dynamic sealing (103) top.
6. fuel-injection pump according to claim 1, it is characterized in that, described perforation (104) has its second end (104(b) be connected on fuel inlet (105)), described fuel inlet (105) supplies fuel to described cylinder assembly (101).
7. fuel-injection pump according to claim 1, it is characterized in that, described perforation (104) also comprises first portion (104(c)) and second portion (104(d)), make described first portion (104 (c))) through described cylinder assembly (101), and described second portion (104(d)) through described shell of fuel pump (106).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN5977CH2013 | 2013-12-23 | ||
| IN5977/CHE/2013 | 2013-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104728008A true CN104728008A (en) | 2015-06-24 |
Family
ID=53452289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410800922.0A Pending CN104728008A (en) | 2013-12-23 | 2014-12-22 | Fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104728008A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137837A (en) * | 2005-03-09 | 2008-03-05 | 卡特彼勒公司 | High pressure pump and method of reducing fluid mixing within same |
| CN102062032A (en) * | 2009-11-03 | 2011-05-18 | 马涅蒂-马瑞利公司 | Fuel pump with reduced seal wear for a direct injection system |
| CN102741541A (en) * | 2009-12-23 | 2012-10-17 | 卡特彼勒发动机有限责任两合公司 | Purging method and system with scraper or wiper ring for preventing formation of deposits inside fuel pump |
| WO2013098301A1 (en) * | 2011-12-27 | 2013-07-04 | Robert Bosch Gmbh | High-pressure fuel pump for a fuel injection system |
-
2014
- 2014-12-22 CN CN201410800922.0A patent/CN104728008A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137837A (en) * | 2005-03-09 | 2008-03-05 | 卡特彼勒公司 | High pressure pump and method of reducing fluid mixing within same |
| CN102062032A (en) * | 2009-11-03 | 2011-05-18 | 马涅蒂-马瑞利公司 | Fuel pump with reduced seal wear for a direct injection system |
| CN102741541A (en) * | 2009-12-23 | 2012-10-17 | 卡特彼勒发动机有限责任两合公司 | Purging method and system with scraper or wiper ring for preventing formation of deposits inside fuel pump |
| WO2013098301A1 (en) * | 2011-12-27 | 2013-07-04 | Robert Bosch Gmbh | High-pressure fuel pump for a fuel injection system |
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| C06 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |
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| WD01 | Invention patent application deemed withdrawn after publication |