WO2011054632A2 - Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine - Google Patents
Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine Download PDFInfo
- Publication number
- WO2011054632A2 WO2011054632A2 PCT/EP2010/065272 EP2010065272W WO2011054632A2 WO 2011054632 A2 WO2011054632 A2 WO 2011054632A2 EP 2010065272 W EP2010065272 W EP 2010065272W WO 2011054632 A2 WO2011054632 A2 WO 2011054632A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plug
- pump unit
- fuel
- unit according
- delivery passage
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1085—Valves; Arrangement of valves having means for limiting the opening height
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
- F04B53/101—Ball valves having means for limiting the opening height
Definitions
- the present invention relates to a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine.
- the present invention relates to a pump unit comprising a pump housing, a piston pump for supplying the fuel to an internal combustion engine, and a gear pump for supplying the fuel to the piston pump.
- the piston pump comprises at least one cylinder, a piston engaged slidably in the cylinder, a passage for the intake of the fuel into the cylinder, a passage for delivering the fuel to the internal combustion engine, and a check valve fitted in the delivery passage to prevent the backflow of the fuel into the cylinder.
- the check valve comprises a substantially spherical plug which is movable between a position in which it closes the delivery passage and a position in which it opens it, and a spring for moving the plug into its closed position and, normally, keeping it there.
- the plug Since the plug is supported solely by the spring, the plug is movable from its closed position, in which it engages an annular spherical seat formed in the delivery passage, to its open position along a path which is not rectilinear and which does not coincide with the longitudinal axis of the delivery passage, the plug therefore being displaced radially and made to rotate by the fuel supplied through the delivery passage. Consequently, the movement of the plug from its open to its closed position also takes place along a non-rectilinear path which does not coincide with the longitudinal axis of the delivery passage, and the plug is therefore kept in rotation by the hydraulic force exerted by the fuel, and is moved radially against a lateral wall of the aforesaid annular spherical seat.
- the centrifugal force generated by the rotation of the plug can be so great, in certain operating conditions, that it retards or even prevents the correct closure of the delivery passage.
- the object of the present invention is to provide a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine which is free of the drawbacks described above and which is simple and economical to produce.
- a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine, as claimed in the appended claims.
- the number 1 indicates, as a whole, a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine (not shown).
- fuel preferably diesel oil
- the pump unit 1 comprises, in the present case, a pump housing 2; a known piston pump, which is not shown, for supplying the fuel to the aforesaid internal combustion engine (not shown); and a known gear pump, which is not shown, for supplying the fuel to the piston pump (not shown).
- the piston pump (not shown) comprises at least one cylinder which is engaged slidably by a piston which can move with a reciprocating rectilinear motion along the cylinder, and which is associated with a passage for the intake of fuel into the cylinder and with a passage 3 for delivering the fuel to the internal combustion engine (not shown).
- the passage 3 has a specified longitudinal axis 4, and comprises a constricted portion 5 communicating with the cylinder of the piston pump (not shown), an enlarged portion 6 communicating with the internal combustion engine (not shown), and an intermediate portion 7, which extends between portions 5 and 6, and forms an annular conical seat 8 which is substantially coaxial with the axis 4.
- the seat 8 forms part of a check valve 9, which is housed in the passage 3 to prevent the backflow of the fuel into the cylinder of the piston pump (not shown), this valve also comprising a substantially spherical plug 10, which is movable between a position in which the passage 3 is closed and a position in which it is open, and being provided with a stop member 11 mounted in the portion 6 to halt the movement of the plug 10 in its open position.
- the member 11 is substantially screw-shaped and comprises a head 12 screwed into the pump housing 2 and a tubular shank 13, which extends into the portion 6 coaxially with the axis 4, and has an outside diameter which is smaller than the inside diameter of the portion 6.
- the free end of the shank 13 facing the plug 10 is axially open and forms an annular conical seat 14 for halting the movement of the plug 10 in its open position.
- the shank 13 forms, in combination with the portion 6, an annular chamber 15 which is substantially coaxial with the axis 4, and also has an internal passage 16 which is coaxial with the axis 4, and comprises an enlarged portion 17 facing the plug 10 and a constricted portion 18 facing the head 12.
- the portion 17 houses within it a spring 19, mounted coaxially with the axis 4, for moving the plug 10 into its closed position and normally keeping it there, and communicates with the chamber 15 through a plurality of holes 20 which are uniformly distributed about the axis 4 and which are formed through the shank 13 transversely with respect to the axis 4; and the portion 18 communicates with an annular manifold 21 formed in the pump housing 2 coaxially with the axis 4 through a plurality of holes 22, which are uniformly distributed about the axis 4, and which are formed through the shank 13 transversely with respect to the axis 4.
- the portion 6 and the shank 13 are also coupled together in a fluid-tight way by the interposition of an annular seal 23, in the present case an O-ring, mounted coaxially with the axis 4 in an intermediate point of the shank 13 between the holes 20 and 22.
- an annular seal 23 in the present case an O-ring, mounted coaxially with the axis 4 in an intermediate point of the shank 13 between the holes 20 and 22.
- the plug 10 is moved, by the fuel supplied by the piston pump (not shown) along the passage 3, to the position in which it opens the passage 3, thus enabling the fuel to flow, in succession, through the intermediate portion 7, along the chamber 15, through the holes 20, along the passage 16, through the holes 22, and into the manifold 21.
- the diameter of the plug 10 and the inside diameter of the portion 17 are controlled selectively in such a way that the force exerted on the plug 10 by the fuel contained in the passage 3 is greater than the sum of the forces exerted on the plug 10 by the spring 19 and by the fuel contained in the passage 16, and since the supply of the fuel along the chamber 15 and through the holes 20 causes a pressure drop in the fuel, resulting in a lower pressure in the passage 16 than in the passage 3, the plug 10 is moved along a rectilinear path along the axis 4 in such a way that it engages the seat 14, and is substantially held in the seat 14 throughout the delivery phase of the piston pump (not shown) without the possibility of moving axially and/or radially.
- the plug 10 is moved along a substantially rectilinear path along the axis 4 by the force of the spring 19 and the fuel contained in the passage 16, in such a way that it engages the seat 8 and closes the passage 3 relatively quickly.
- the spring 19 is omitted, and the plug 10 is closed solely by the force of the fuel contained in the passage 16.
- the annular seal 23 is omitted and the shank 13 is made in such a way that it comprises a constricted end portion, which is provided with the holes 20, and which has an outside diameter smaller than the diameter of the portion 6, and an enlarged intermediate portion, which extends between the holes 20 and 22, has an outside diameter substantially equal to the diameter of the portion 6, enables the fuel to be diverted through the holes 20 so as to provide the desired pressure drop in the fuel in the passage 16, and simultaneously prevents the fuel from flowing directly into the manifold 21 along the chamber 15.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
A pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine is provided with a check valve (9), which is positioned in the passage (3) for delivering the fuel to the internal combustion engine and which is provided with a plug (10) which is movable between a position in which it opens the delivery passage (3) and a position in which it closes the passage, a stop element (11) being fitted in the delivery passage (3) to form a seat (14) for receiving and retaining the plug (10) after the opening of the check valve (9).
Description
Description
Title
PUMP UNIT FOR SUPPLYING FU EL, PREFERABLY DI ESEL OIL, TO AN INTERNAL COMBUSTION ENGINE
The present invention relates to a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine.
More specifically, the present invention relates to a pump unit comprising a pump housing, a piston pump for supplying the fuel to an internal combustion engine, and a gear pump for supplying the fuel to the piston pump.
The piston pump comprises at least one cylinder, a piston engaged slidably in the cylinder, a passage for the intake of the fuel into the cylinder, a passage for delivering the fuel to the internal combustion engine, and a check valve fitted in the delivery passage to prevent the backflow of the fuel into the cylinder.
Generally, the check valve comprises a substantially spherical plug which is movable between a position in which it closes the delivery passage and a position in which it opens it, and a spring for moving the plug into its closed position and, normally, keeping it there.
Since the plug is supported solely by the spring, the plug is movable from its closed position, in which it engages an annular spherical seat formed in the delivery passage, to its open position along a path which is not rectilinear and which does not coincide with the longitudinal axis of the delivery passage, the plug therefore being displaced radially and made to rotate by the fuel supplied through the delivery passage.
Consequently, the movement of the plug from its open to its closed position also takes place along a non-rectilinear path which does not coincide with the longitudinal axis of the delivery passage, and the plug is therefore kept in rotation by the hydraulic force exerted by the fuel, and is moved radially against a lateral wall of the aforesaid annular spherical seat. The centrifugal force generated by the rotation of the plug can be so great, in certain operating conditions, that it retards or even prevents the correct closure of the delivery passage.
The object of the present invention is to provide a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine which is free of the drawbacks described above and which is simple and economical to produce.
According to the present invention, a pump unit is provided for supplying fuel, preferably diesel oil, to an internal combustion engine, as claimed in the appended claims.
The present invention will now be described with reference to the attached figure which shows, in longitudinal section and with parts removed for clarity, a non- limiting exemplary embodiment of the invention.
With reference to the attached figure, the number 1 indicates, as a whole, a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine (not shown).
The pump unit 1 comprises, in the present case, a pump housing 2; a known piston pump, which is not shown, for supplying the fuel to the aforesaid internal combustion engine (not shown); and a known gear pump, which is not shown, for supplying the fuel to the piston pump (not shown).
The piston pump (not shown) comprises at least one cylinder which is engaged slidably by a piston which can move with a reciprocating rectilinear motion along the cylinder, and which is associated with a passage for the intake of fuel into the cylinder and with a passage 3 for delivering the fuel to the internal combustion engine (not shown).
The passage 3 has a specified longitudinal axis 4, and comprises a constricted portion 5 communicating with the cylinder of the piston pump (not shown), an enlarged portion 6 communicating with the internal combustion engine (not shown), and an intermediate portion 7, which extends between portions 5 and 6, and forms an annular conical seat 8 which is substantially coaxial with the axis 4.
The seat 8 forms part of a check valve 9, which is housed in the passage 3 to prevent the backflow of the fuel into the cylinder of the piston pump (not shown), this valve also comprising a substantially spherical plug 10, which is movable between a position in which the passage 3 is closed and a position in which it is open, and being provided with a stop member 11 mounted in the portion 6 to halt the movement of the plug 10 in its open position.
The member 11 is substantially screw-shaped and comprises a head 12 screwed into the pump housing 2 and a tubular shank 13, which extends into the portion 6 coaxially with the axis 4, and has an outside diameter which is smaller than the inside diameter of the portion 6. The free end of the shank 13 facing the plug 10 is axially open and forms an annular conical seat 14 for halting the movement of the plug 10 in its open position.
The shank 13 forms, in combination with the portion 6, an annular chamber 15 which is substantially coaxial with the axis 4, and also has an internal passage 16 which is coaxial with the axis 4, and comprises an enlarged portion 17 facing the plug 10 and a constricted portion 18 facing the head 12.
The portion 17 houses within it a spring 19, mounted coaxially with the axis 4, for moving the plug 10 into its closed position and normally keeping it there, and communicates with the chamber 15 through a plurality of holes 20 which are uniformly distributed about the axis 4 and which are formed through the shank 13 transversely with respect to the axis 4; and the portion 18 communicates with an annular manifold 21 formed in the pump housing 2 coaxially with the axis 4 through a plurality of holes 22, which are uniformly distributed about the axis 4,
and which are formed through the shank 13 transversely with respect to the axis 4.
The portion 6 and the shank 13 are also coupled together in a fluid-tight way by the interposition of an annular seal 23, in the present case an O-ring, mounted coaxially with the axis 4 in an intermediate point of the shank 13 between the holes 20 and 22.
In use, the plug 10 is moved, by the fuel supplied by the piston pump (not shown) along the passage 3, to the position in which it opens the passage 3, thus enabling the fuel to flow, in succession, through the intermediate portion 7, along the chamber 15, through the holes 20, along the passage 16, through the holes 22, and into the manifold 21.
Since the diameter of the plug 10 and the inside diameter of the portion 17 are controlled selectively in such a way that the force exerted on the plug 10 by the fuel contained in the passage 3 is greater than the sum of the forces exerted on the plug 10 by the spring 19 and by the fuel contained in the passage 16, and since the supply of the fuel along the chamber 15 and through the holes 20 causes a pressure drop in the fuel, resulting in a lower pressure in the passage 16 than in the passage 3, the plug 10 is moved along a rectilinear path along the axis 4 in such a way that it engages the seat 14, and is substantially held in the seat 14 throughout the delivery phase of the piston pump (not shown) without the possibility of moving axially and/or radially.
At the end of the delivery phase and during the intake phase of the piston pump (not shown), the plug 10 is moved along a substantially rectilinear path along the axis 4 by the force of the spring 19 and the fuel contained in the passage 16, in such a way that it engages the seat 8 and closes the passage 3 relatively quickly.
Because of the presence and shape of the stop member 11, and of the shank 13 in particular, it is therefore possible to move the plug 10 into its open and closed positions along substantially rectilinear paths along the axis 4, to hold the plug 10 in the seat 14 throughout the delivery phase of the piston pump (not shown), to
prevent radial and/or axial movements of the plug 10 in the seats 8 and 14 so as to reduce the wear on the plug 10, the seats 8 and 14, and the spring 19, and to reduce the closing time of the plug 10, thus improving the efficiency of the pump unit 1.
In a first variant which is not shown, the spring 19 is omitted, and the plug 10 is closed solely by the force of the fuel contained in the passage 16.
In another variant which is not shown, the annular seal 23 is omitted and the shank 13 is made in such a way that it comprises a constricted end portion, which is provided with the holes 20, and which has an outside diameter smaller than the diameter of the portion 6, and an enlarged intermediate portion, which extends between the holes 20 and 22, has an outside diameter substantially equal to the diameter of the portion 6, enables the fuel to be diverted through the holes 20 so as to provide the desired pressure drop in the fuel in the passage 16, and simultaneously prevents the fuel from flowing directly into the manifold 21 along the chamber 15.
Claims
1. Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine, the pump unit comprising a pump housing (2); a delivery passage (3) formed in the pump housing (2) for supplying the fuel to the internal combustion engine; and a check valve (9) positioned in the delivery passage (3); the check valve (9) comprising a plug (10), which is movable between a position in which it opens the delivery passage (3) and a position in which it closes the passage, and a first seat (8) formed in the delivery passage (3) to receive the plug (10) after its movement from the open to the closed position; and being characterized in that it also comprises a stop element (11) fitted in the delivery passage (3) and provided with a second seat (14) for receiving and retaining the plug (10) after the movement of the latter from the closed to the open position.
2. Pump unit according to Claim 1, in which the stop element (11) com- prises at least one tubular portion (13) which has an axially open free end forming said second seat (14), and which is hydraulically connected to the delivery passage (3) when the plug (10) is placed in its open position.
3. Pump unit according to Claim 2 and additionally comprising a hydraulic circuit (6, 7, 15, 20) for supplying the fuel through the first seat (8) and into the tubular portion (13); the hydraulic circuit (6, 7, 15, 20) being shaped in such a way that the pressure exerted on the plug (10) by the fuel contained in the tubular portion (13) is lower than the pressure exerted on the plug (10) by the fuel supplied through said first seat (8).
4. Pump unit according to Claim 2 or 3, in which the stop element (11) comprises at least one aperture (20) for the entry of the fuel into the tubular portion (13) and at least one aperture (22) for the outflow of the fuel from the tubular portion (13); the force exerted on the plug (10) by the fuel contained in the tubular portion (13) being smaller than the force exerted on the plug (10) by the fuel supplied through said first seat (8), in such a way that the plug (10) is held in its open position.
5. Pump unit according to Claim 4, in which the tubular portion (13) has a specified longitudinal axis (4); the entry aperture (20) being substantially transverse with respect to the axis (4).
6. Pump unit according to Claim 5, in which the tubular portion (13) comprises at least a first portion which has an outside diameter smaller than the diameter of the corresponding portion (6) of the delivery passage (3), and which is provided with said entry aperture (20).
7. Pump unit according to any one of Claims 4 to 6 and additionally comprising a sealing device (23) interposed between the delivery passage (3) and the stop element (11) to divert the fuel through said entry aperture (20).
8. Pump unit according to Claim 7, in which the sealing device (23) comprises an annular gasket (23) mounted between the delivery passage (3) and the stop element (11) and between the entry aperture (20) and the outflow aperture (22).
9. Pump unit according to Claim 7, in which the tubular portion (13) comprises a second portion which extends between the entry aperture (20) and the outflow aperture (22), and has an outside diameter substantially equal to the diameter of the corresponding portion (6) of the delivery passage (3).
10. Pump unit according to any one of Claims 2 to 9, in which the check valve (9) additionally comprises a spring (19) which pushes the plug (10) towards its closed position; the force exerted on the plug (10) by the fuel supplied through said first seat (8) being greater than the sum of the forces exerted on the plug (10) by the spring (19) and by the fuel contained in the tubular portion (13).
11. Pump unit according to any one of the preceding claims, in which the stop element (11) is fixed in the pump housing (2).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10763714.2A EP2496837B1 (en) | 2009-11-06 | 2010-10-12 | Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine |
| RU2012123138/06A RU2555097C2 (en) | 2009-11-06 | 2010-10-12 | Pump for diesel oil feed into ice |
| BR112012010323A BR112012010323A2 (en) | 2009-11-06 | 2010-10-12 | pump unit for fueling, preferably diesel, an internal combustion engine. |
| CN201080049784.7A CN102597521B (en) | 2009-11-06 | 2010-10-12 | Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine |
| IN1494DEN2012 IN2012DN01494A (en) | 2009-11-06 | 2010-10-12 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI2009A001948 | 2009-11-06 | ||
| IT001948A ITMI20091948A1 (en) | 2009-11-06 | 2009-11-06 | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2011054632A2 true WO2011054632A2 (en) | 2011-05-12 |
| WO2011054632A3 WO2011054632A3 (en) | 2011-07-14 |
Family
ID=42272163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/065272 WO2011054632A2 (en) | 2009-11-06 | 2010-10-12 | Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2496837B1 (en) |
| CN (1) | CN102597521B (en) |
| IN (1) | IN2012DN01494A (en) |
| IT (1) | ITMI20091948A1 (en) |
| RU (1) | RU2555097C2 (en) |
| WO (1) | WO2011054632A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3006734A3 (en) * | 2014-09-26 | 2016-04-27 | Koganei Seiki Co., Ltd. | Diesel fuel pump |
| CN106150809A (en) * | 2016-06-29 | 2016-11-23 | 中国北方发动机研究所(天津) | A kind of high compact big-flow high-pressure variable pump inlet valve |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2952742B1 (en) * | 2014-06-05 | 2016-10-26 | WABCO Europe BVBA | Vacuum pump and system of a vacuum pump and an engine |
| WO2016055294A1 (en) * | 2014-10-09 | 2016-04-14 | Robert Bosch Gmbh | Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2899974A (en) * | 1959-08-18 | Non-return ball valve forreciprocat- | ||
| US2294568A (en) * | 1941-04-21 | 1942-09-01 | Karl P Neilsen | Ball valve cage |
| SU109108A1 (en) * | 1957-02-01 | 1957-11-30 | В.Е. Горбаневский | High pressure fuel pump injection valve |
| SU454367A1 (en) * | 1971-11-29 | 1974-12-25 | Предприятие П/Я А-1877 | Fuel pump discharge valve |
| DE4213798C2 (en) * | 1992-04-27 | 2002-10-24 | Bosch Gmbh Robert | Radial piston pump, in particular fuel pump for internal combustion engines |
| IT248790Y1 (en) * | 1999-11-30 | 2003-02-20 | Elasis Sistema Ricerca Fiat | HIGH PRESSURE DELIVERY VALVE FOR THE FUEL OF AN INTERNAL COMBUSTION ENGINE. |
| JP4330323B2 (en) * | 2001-10-24 | 2009-09-16 | 株式会社タクミナ | Reciprocating pump |
| RU2221952C2 (en) * | 2002-02-18 | 2004-01-20 | Камышев Александр Владимирович | Ball valve |
| EP1803937B1 (en) * | 2002-10-09 | 2008-12-03 | Tacmina Corporation | Reciprocating diaphragm pump and check valve |
| DE10346211A1 (en) * | 2003-05-22 | 2004-12-09 | Robert Bosch Gmbh | Check valve, in particular for a high-pressure pump of a fuel injection device for an internal combustion engine |
| EP1813845A1 (en) * | 2006-01-31 | 2007-08-01 | Centro Studi Componenti per Veicoli S.P.A. | High-pressure pump for feeding fuel to an internal combustion engine |
| BRPI0707329A2 (en) * | 2006-01-31 | 2011-05-03 | Bosch Gmbh Robert | high pressure pump to fuel fuel for an internal combustion engine |
-
2009
- 2009-11-06 IT IT001948A patent/ITMI20091948A1/en unknown
-
2010
- 2010-10-12 WO PCT/EP2010/065272 patent/WO2011054632A2/en active Application Filing
- 2010-10-12 EP EP10763714.2A patent/EP2496837B1/en not_active Not-in-force
- 2010-10-12 RU RU2012123138/06A patent/RU2555097C2/en not_active IP Right Cessation
- 2010-10-12 IN IN1494DEN2012 patent/IN2012DN01494A/en unknown
- 2010-10-12 CN CN201080049784.7A patent/CN102597521B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| None |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3006734A3 (en) * | 2014-09-26 | 2016-04-27 | Koganei Seiki Co., Ltd. | Diesel fuel pump |
| CN106150809A (en) * | 2016-06-29 | 2016-11-23 | 中国北方发动机研究所(天津) | A kind of high compact big-flow high-pressure variable pump inlet valve |
| CN106150809B (en) * | 2016-06-29 | 2019-06-11 | 中国北方发动机研究所(天津) | A kind of big-flow high-pressure variable oil pump inlet valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102597521B (en) | 2015-03-25 |
| WO2011054632A3 (en) | 2011-07-14 |
| ITMI20091948A1 (en) | 2011-05-07 |
| RU2555097C2 (en) | 2015-07-10 |
| EP2496837B1 (en) | 2018-05-09 |
| RU2012123138A (en) | 2013-12-20 |
| CN102597521A (en) | 2012-07-18 |
| EP2496837A2 (en) | 2012-09-12 |
| IN2012DN01494A (en) | 2015-06-05 |
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