CN101542107A - High-pressure fuel feed pump - Google Patents
High-pressure fuel feed pump Download PDFInfo
- Publication number
- CN101542107A CN101542107A CNA2007800432037A CN200780043203A CN101542107A CN 101542107 A CN101542107 A CN 101542107A CN A2007800432037 A CNA2007800432037 A CN A2007800432037A CN 200780043203 A CN200780043203 A CN 200780043203A CN 101542107 A CN101542107 A CN 101542107A
- Authority
- CN
- China
- Prior art keywords
- fuel
- pressure
- leaked
- plunger
- addition
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
In a high-pressure fuel feed pump (1), high-pressure pump sections (1A to 1D) are adapted to output high-pressure fuel obtained by pressurizing fuel sucked into barrels (11). In each of the high-pressure pump sections (1A to 1D), fuel lubrication is performed between the plunger (12) and the barrel (11) by at least a portion of the high-pressure fuel. The high-pressure fuel sections (1A to 1D) respectively have leaked-fuel takeout sections (16, 26, 36, 46) for taking out leaked fuel, which is produced by the high-pressure fuel for the fuel lubrication, from the inside of the barrels (11) to the outside. The fuel feed pump has a connection oil path (50) for collecting the leaked fuel that is taken out by the leaked-fuel takeout sections (16, 26, 36, 46) and guiding the leaked fuel to the low fuel pressure side. The leaked fuel is released to a fuel tank through the connection oil path (50).
Description
Technical field
The present invention relates to high-pressure fuel feed pump.
Background technique
The high-pressure fuel feed pump that is used to supply with to common rail system the purpose of fuel under high pressure traditionally for example has such structure, wherein, as shown in Figure 6, be received can be in plunger bushing (バ レ Le) 101 reciprocating plunger 102 reciprocally to move corresponding to the rotation of camshaft 103 with to be fed into the fuel pressurization in the plunger bushing 101 by I/O valve 104, and wherein, resulting thus fuel under high pressure is sent to the outside by I/O valve 104.In addition, at file JP-A-8-68370, disclose a kind of structure of high-pressure fuel feed pump, it comprises two return paths, and one in these two return paths is connected on the fuel tank.
Summary of the invention
Traditional high pressure fuel pump shown in Figure 6 is configured to, leaked fuel (it is the part in the pressurized fuel under high pressure that is used in fuel lubricated, the plunger bushing 101 of plunger bushing 101) is supplied to by path 105 and is back in the plunger bushing 101, like this, in particular under the running state that the fuel quantity of emitting tails off, because the above-mentioned circulation of this fuel, the temperature of plunger bushing 101 and plunger 102 rises, and this has become the great factor that causes the fuel ejection efficiency to reduce.Simultaneously, have such problem in the disclosed structure of file JP-A-8-68370, that is, under the situation of the structure that comprises a plurality of high-pressure service pump portion, the structure that is used to handle the return path of leaked fuel becomes complicated and causes cost to rise.
The object of the present invention is to provide the high-pressure fuel feed pump that can solve the aforementioned problems in the prior.
In order to address the above problem, according to the present invention, a kind of high-pressure fuel feed pump has been proposed, this high-pressure fuel feed pump comprises a plurality of high-pressure service pump portion, these high-pressure service pump portions are configured for and utilize plunger and pressurize and emit fuel under high pressure being inhaled into fuel in the plunger bushing, this high-pressure fuel feed pump at least a portion by fuel under high pressure in each high-pressure service pump portion realizes fuel lubricated between plunger and the plunger bushing, wherein, each high-pressure service pump portion comprises leaked fuel taking-up portion, this leaked fuel taking-up portion is used for for fuel lubricated and leaked fuel that produce is taken out to the outside in plunger bushing, and the leaked fuel that is removed in each from leaked fuel taking-up portion send road (リ Yi ク Do send the road) to be directed to the fuel low voltage side by leaking in addition.
According to the present invention, leaked fuel (it is a part that is used for the fuel lubricated fuel between plunger and the plunger bushing) is not recycled and is supplied to plunger bushing, thereby the rising of ram temperature is controlled, and, can utilize simple structure to improve the fuel ejection efficiency.
Description of drawings
Fig. 1 is the overall appearance figure of embodiments of the present invention.
Fig. 2 is the sectional view of the first high-pressure service pump portion shown in Fig. 1.
Fig. 3 intercepts the figure that illustrates, is used to describe leaked fuel taking-up portion according to A-A line shown in Figure 1.
Fig. 4 is the figure that is used to describe the modification of embodiments of the present invention.
Fig. 5 is the figure that is used to describe the modification of embodiments of the present invention.
Fig. 6 is the figure that is used to describe traditional high-pressure fuel feed pump.
Embodiment
In order to illustrate in greater detail the present invention, describe by accompanying drawing.
Fig. 1 is the figure of outward appearance that generally shows the embodiment of high-pressure fuel feed pump, and the present invention is applied to this high-pressure fuel feed pump.In the present embodiment, high-pressure fuel feed pump 1 is used as the supply pump of common rail system (not shown), this common rail system is used as fuel injection systems of diesel, and, in body 2, be provided with four high-pressure service pump portions that comprise first 1A to the of high-pressure service pump portion, four 1D of high-pressure service pump portion, these four high-pressure service pump portions are driven by camshaft (with reference to Fig. 2) in the mode that has predetermined phase difference, and this camshaft is driven by the rotary driving force of unshowned diesel engine.
Fig. 2 is the pump sectional view that is used to describe first 1A of high-pressure service pump portion.Below, with reference to Fig. 2 first 1A of high-pressure service pump portion is elaborated, but, the structure of second 1B to the of high-pressure service pump portion, four 1D of high-pressure service pump portion also can be identical with the structure of the first high-pressure service pump portion.
What label 3 was represented is pump case, and the common base portion end 3Y of pump case 3 forms the general cylindrical shape shape of the axis that has on the direction vertical with paper, is provided with camshaft 4 coaxially in the 3Y of common base portion end.In addition, on the 3Y of the common base portion end of pump case 3, formed the first cylindrical part 3A, and the main structure of first 1A of high-pressure service pump portion is included in partly in the first cylindrical part 3A.
Although it is not shown in Fig. 2, but on the 3Y of common base portion end, formed second to the 4th cylindrical part 3B, 3C, 3D, be used for second 1B of high-pressure service pump portion, the 3rd 1C of high-pressure service pump portion, the 4th 1D of high-pressure service pump portion (with reference to Fig. 1) in the mode similar to the first cylindrical part 3A.First 1A to the of high-pressure service pump portion, four 1D of high-pressure service pump portion are configured to be driven by camshaft 4 in the mode that has phase difference.
Next, the structure to first 1A of high-pressure service pump portion describes.The 11st, be arranged on the plunger bushing in the first cylindrical part 3A coaxially, the 12nd, plunger, it is arranged to can be along the to-and-fro motion in the 11A of the plunger compartment of plunger bushing 11 of its axis, and plunger 12 is configured to be directed on the internal face 3Aa of plunger bushing 11 and can move on the axial direction of the first cylindrical part 3A.The base portion end 12A of plunger 12 is pressed against on the motion guidance parts 13 by elastomeric spring 14 by spring seat 14a.Motion guidance parts 13 are provided with the rotation roller 13B that rotatably fits together by strut 13A.By being installed in the elastomeric spring 14 between plunger bushing 11 and the motion guidance parts 13, motion guidance parts 13 are by flexibly by pressing to camshaft 4, thereby the rotation roller 13B that is arranged on as described above in the motion guidance parts 13 contacts camshaft 4 in the mode that has pressure all the time.
As a result, when the rotating force by unshowned diesel engine makes camshaft 4 rotations, the synchronously to-and-fro motion of rotation of motion guidance parts 13 and camshaft 4, thus can be so that plunger 12 to-and-fro motion in plunger bushing 11.
When plunger 12 when camshaft 4 side rollbacks move, the fuel in the external tank (not shown) by fuel enter road 17,15C, 15B are inhaled among the 11A of plunger compartment.When plunger 12 rose, this fuel that is inhaled into was pressurized, thereby, obtain fuel under high pressure.
Be provided with leaked fuel taking-up portion 16 in the plunger bushing 11, it is used for (zone between plunger bushing 11 and the plunger 12 produces owing to high-pressure fuel is lubricated to the 11A of plunger compartment so that with fuel) leaked fuel is taken out to the outside.In the present embodiment, leaked fuel taking-up portion 16 send the 16C of grease chamber's (リ one Network does not send the grease chamber) to be constituted by the leakage of fuel leak hole 16A, ring port 16B and annular in addition, ring port 16B is arranged in the end of plunger 12 1 sides of fuel leak hole 16A and is used to collect leaked fuel in the plunger bushing, and annular is leaked and sent the 16C of grease chamber to be formed by the circular groove at (at the place, the other end of fuel leak hole 16A) on the periphery wall that is formed at plunger bushing 11 in addition.
Fig. 3 is the sectional view along the A-A line of Fig. 1.As shown in Figure 3, on second 1B to the of high-pressure service pump portion, four 1D of high-pressure service pump portion, be respectively arranged with the leaked fuel taking-up portion 26,36 and 46 similar to leaked fuel taking-up portion 16.That is, leaked fuel taking-up portion 26 send the 26C of grease chamber to be constituted by fuel leak hole 26A, ring port 26B and leakage in addition.Leaked fuel taking-up portion 36 send the 36C of grease chamber to be constituted by fuel leak hole 36A, ring port 36B and leakage in addition.Leaked fuel taking-up portion 46 send the 46C of grease chamber to be constituted by fuel leak hole 46A, ring port 46B and leakage in addition.
In addition, leakage send the 16C of grease chamber, 26C, 36C and 46C to carry road 50 to interconnect as shown in figure by being connected in addition.Connecting conveying road 50 is to leak to send the road in addition, and its leaked fuel that is used for being taken out by each leaked fuel taking-up portion 16,26,36 and 46 is collected and guided to the fuel low voltage side.Therefore, each amount of leaked fuel taking-up portion 16,26,36 by each high-pressure service pump portion and 46 leaked fuel that are removed is sent the 16C of grease chamber, 26C, 36C and 46C to be fed to from corresponding leakage to be connected conveying road 50 in addition, and be fed to the fuel low voltage side respectively, and for example, fuel tank.
High pressure fuel pump 1 constitutes as previously discussed, so, be fed to fuel low voltage section by the leaked fuel taking-up portion 16,26,36 and 46 that is separately positioned on high-pressure service pump portion such as fuel tank etc. by the lubricated leaked fuel that fuel under high pressure produced that is used between plunger bushing and the plunger.As a result, the temperature that is supplied to the fuel of plunger 11 can not rise (because leakage of fuel under high pressure), compares with conventional art, can improve the fuel ejection efficiency significantly.
The leaked fuel that has shown each high-pressure service pump portion among Fig. 3 is sent the 16C of grease chamber, 26C, 36C and 46C to be fed to the situation of fuel tank by connecting conveying road 50 from four leakages in addition.Fig. 4 is the schematic representation that this is described.Yet the mode that allows leaked fuel to overflow is not limited to this structure.
Fig. 5 has shown other the example that allows mode that leaked fuel overflows.According to structure shown in Figure 5, allow leaked fuel to overflow by special-purpose effusion path 70 is set, this effusion path 70 will leak to send the 16C of grease chamber, 26C, 36C and 46C to interconnect in addition and will leak and send the 16C of grease chamber, 26C, 36C and 46C to be connected on another interior return path of high-pressure service pump in addition.According to structure shown in Figure 5, the advantage that can obtain is not need new pipeline outside high-pressure service pump.It should be noted, although having shown to connect in Fig. 4 carries road 50 through leaking the situation at the center of sending the 16C of grease chamber, 26C, 36C and 46C in addition, but this structure is an example, connects to carry road 50 and nonessential through leaking the center of sending the 16C of grease chamber, 26C, 36C and 46C in addition.
The possibility of using on the industry
As mentioned above, the fuel lubricated leaked fuel that is used between plunger and the plunger bushing is not followed The ring and be supplied to plunger bushing, therefore, high-pressure fuel feed pump according to the present invention has been controlled plunger The rising of temperature thus, can improve the fuel ejection efficiency, and, can be used for fuel under high pressure The improvement of supply pump.
Claims (4)
1. high-pressure fuel feed pump, described high-pressure fuel feed pump comprises a plurality of high-pressure service pump portion, described high-pressure service pump cage structure becomes to utilize plunger to being inhaled into fuel in the plunger bushing and pressurizeing and emitting fuel under high pressure, and wherein, in in described a plurality of high-pressure service pump portion each, fuel lubricated at least a portion by described fuel under high pressure between described plunger and the described plunger bushing is carried out
Wherein, each in the described high-pressure service pump portion comprises leaked fuel taking-up portion, and described leaked fuel taking-up portion is used for for the described fuel lubricated leaked fuel that produces is taken out to the outside in described plunger bushing, and
Send the road to be directed to the fuel low voltage side by the leaked fuel that each described leaked fuel taking-up portion takes out in addition by leaking.
2. high-pressure fuel feed pump according to claim 1, it is characterized in that, each described leaked fuel taking-up portion comprises that fuel leak hole, ring port and annular are leaked and send the grease chamber in addition, described ring port is arranged on the end of described plunger side in described fuel leak hole and is used to collect leaked fuel in the described plunger bushing, and described annular is leaked and sent in addition that formed circular groove is formed in the grease chamber is in described plunger bushing by the other end in described fuel leak hole the periphery wall.
3. high-pressure fuel feed pump according to claim 2 is characterized in that, it is each of described a plurality of high-pressure service pump portion to be leaked the connection oil that send the grease chamber to interconnect in addition send the road that the road is sent in described leakage in addition.
4. high-pressure fuel feed pump according to claim 2, it is characterized in that, it is special use effusion path on another return path that is connected in the high-pressure service pump that the road is sent in described leakage in addition, and each leakage that described effusion path is connected to described a plurality of high-pressure service pump portion is sent in the grease chamber in addition.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006316693A JP2008128164A (en) | 2006-11-24 | 2006-11-24 | High pressure fuel supply pump |
| JP316693/2006 | 2006-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101542107A true CN101542107A (en) | 2009-09-23 |
Family
ID=39429530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800432037A Pending CN101542107A (en) | 2006-11-24 | 2007-08-14 | High-pressure fuel feed pump |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2088309A4 (en) |
| JP (1) | JP2008128164A (en) |
| CN (1) | CN101542107A (en) |
| WO (1) | WO2008062589A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465801A (en) * | 2010-11-18 | 2012-05-23 | 博世汽车柴油***股份有限公司 | High-pressure fuel pump |
| WO2012065569A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
| WO2012065566A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2530315A1 (en) | 2011-06-02 | 2012-12-05 | Delphi Technologies Holding S.à.r.l. | Fuel pump lubrication |
| EP2530316A1 (en) * | 2011-06-02 | 2012-12-05 | Delphi Technologies Holding S.à.r.l. | Fuel pump lubrication |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586960A (en) * | 1981-07-03 | 1983-01-14 | Daido Steel Co Ltd | High manganese steel rail |
| JPS586960U (en) * | 1981-07-04 | 1983-01-17 | ヤンマーディーゼル株式会社 | fuel injection pump |
| DE3313322A1 (en) * | 1983-04-13 | 1984-10-18 | Klöckner-Humboldt-Deutz AG, 5000 Köln | INJECTION PUMP FOR A PISTON PISTON COMBUSTION ENGINE |
| US5339724A (en) * | 1991-03-05 | 1994-08-23 | Wartsila Diesel International Ltd. Oy | Arrangement for the lubrication of the piston member of a fuel injection pump |
| JP3522782B2 (en) * | 1993-02-12 | 2004-04-26 | ロバート ボッシュ ゲーエムベーハー | Pump device |
| JP3199105B2 (en) | 1994-06-24 | 2001-08-13 | 株式会社デンソー | High pressure fuel supply pump |
| JP3885506B2 (en) * | 2001-03-22 | 2007-02-21 | いすゞ自動車株式会社 | Fuel injection pump for dimethyl ether engine |
-
2006
- 2006-11-24 JP JP2006316693A patent/JP2008128164A/en active Pending
-
2007
- 2007-08-14 EP EP07792693A patent/EP2088309A4/en not_active Withdrawn
- 2007-08-14 WO PCT/JP2007/066078 patent/WO2008062589A1/en active Application Filing
- 2007-08-14 CN CNA2007800432037A patent/CN101542107A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465801A (en) * | 2010-11-18 | 2012-05-23 | 博世汽车柴油***股份有限公司 | High-pressure fuel pump |
| WO2012065569A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
| WO2012065566A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
| CN102465801B (en) * | 2010-11-18 | 2014-08-13 | 博世汽车柴油***有限公司 | High-pressure fuel pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008128164A (en) | 2008-06-05 |
| EP2088309A4 (en) | 2010-06-02 |
| EP2088309A1 (en) | 2009-08-12 |
| WO2008062589A1 (en) | 2008-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090923 |