DK147381B - Injection valve for stamp combustion engines - Google Patents

Injection valve for stamp combustion engines Download PDF

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Publication number
DK147381B
DK147381B DK368478A DK368478A DK147381B DK 147381 B DK147381 B DK 147381B DK 368478 A DK368478 A DK 368478A DK 368478 A DK368478 A DK 368478A DK 147381 B DK147381 B DK 147381B
Authority
DK
Denmark
Prior art keywords
valve
fuel
nozzle bores
needle
injection valve
Prior art date
Application number
DK368478A
Other languages
Danish (da)
Other versions
DK368478A (en
DK147381C (en
Inventor
Peter Fuchs
Original Assignee
Sulzer Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CH1065277A priority Critical patent/CH623114A5/de
Priority to CH1065277 priority
Application filed by Sulzer Ag filed Critical Sulzer Ag
Publication of DK368478A publication Critical patent/DK368478A/en
Publication of DK147381B publication Critical patent/DK147381B/en
Application granted granted Critical
Publication of DK147381C publication Critical patent/DK147381C/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/182Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08Injectors peculiar thereto
    • F02M45/086Having more than one injection-valve controlling discharge orifices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10Other injectors with elongated valve bodies, i.e. of needle-valve type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/44Valves, e.g. injectors, with valve bodies arranged side-by-side
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46Valves, e.g. injectors, with concentric valve bodies

Description

The invention relates to an injection valve for piston combustion engines and of the kind specified in the preamble of claim 1.
German application pattern No. 7,025,384 discloses an injection valve of the kind specified in the preamble of claim 1, wherein the inner valve needle controls the lower row of nozzle bores and where the cylindrical outer valve needle controls both rows of nozzle bores. In operation, the fuel pressure initially raises the 15 innermost of the two valve pins from its valve seat so that fuel is injected into the cylinder through the associated series of nozzle bores. When the fuel pressure no longer grows, the raised valve needle returns to its valve seat with decreasing fuel pressure. The injection rate is at an end in case of partial load on the engine. When operating the engine under full load, the inner valve needle is first opened, but as the fuel pressure increases further, the outer valve needle is also raised, so that fuel is also sprayed out through the upper row of nozzle bores. That is, during part of the injection rate, fuel is sprayed through all nozzle bores, but at decreasing pressure the outer needle closes first and a little later the inner one closes.
30
Such a construction has several disadvantages. During full-load operation of the engine, the cone-shaped propagation of atomized fuel from the nozzle bores in the two rows will intersect or intersect, resulting in incomplete. combustion. The clashing fuel cones result in an · increased fuel concentration, in which the combustion air can be difficult to come into sufficient close contact with the fuel. This causes smoke evolution. Since the inner valve needle is raised at a low fuel pressure, and that is, before the outer has started to rise at all, this means limitations in the sizing possibilities for the upper series of nozzle bores, since the atomization becomes better the higher the fuel pressure is used. At full load, all the nozzle bores are used, which is why it is not possible to dimension optimally here. If the nozzle bores in the lower row are optimally dimensioned at partial load, they may not be optimal at full load, since at full load 15 a higher fuel pressure is used.
It is an object of the invention to improve the injection valve mentioned above in such a way that both at full load and at partial load of the engine a substantially optimum atomization of the fuel is obtained.
This is achieved by designing the injection valve according to the invention as set forth in the characterizing part of claim 1. In this embodiment, it is possible to let the engine run with one nozzle row under full load and with the other nozzle row at partial load, the nozzle bores in each row being dimensioned for a fuel quantity corresponding to the load of the engine. In this way, not only at full load, but also at partial load, you get a good fuel spray with good, smoke-free combustion, because fuel concentrations that do not burn completely cannot be generated.
By designing the injection valve according to the invention as set forth in claim 2, a structure which is simple to process and yet provides a safe separation between the two fuel circuits at the nozzle bores is obtained.
The invention is explained in more detail with reference to the drawing, in which: FIG. 1a shows a planar axial section through the lower part of an embodiment of the injection valve according to the invention, and figs. 1b shows a planar axial section through the top 15 of the same embodiment.
According to FIG. 1a and 1b, the injection valve has a valve body 1 which consists of an upper part 2 and a lower part 3 held together by means of a single nut 4. The valve body 1 rests with a flange 5 arranged at its upper end on a no closer shown a cylinder head closing a combustion chamber in a cylinder in the piston combustion engine upwards. The valve body 1 is passed through the cylinder head and projects with the lower end of the body part 3 into the combustion chamber 7. At the lower end of the part 3 there are axially displaced for each other two rows of nozzle bores 8 and 9 · The central axes of the nozzle bores in each row lie on a cone sheath, and the cone angles of the two cones 30 differ slightly from each other.
The two rows of nozzle bores 8 and 9 are separated from each other on the fuel side, there being between the two rows of the part 3 a cone-shaped sealing surface 10, on k 147381 1, which rests on a cylindrical hollow valve body 11 having at its lower end a cone surface , which corresponds to the sealing surface 10, and that of a compression spring 12, fig. Ib, is permanently pressed against the sealing surface 10.
5 The compressive force of the spring 12 is transferred over a spring plate 13 and a further valve body 14 to the hollow valve body 11. The spring 12 is dimensioned so that during operation of the injection valve there is no lifting of the valve body 11 10 from the sealing surface 10.
In addition to the outer cone surface cooperating with the sealing surface 10, the valve body 11 has on its inner surface a cone-shaped valve seat surface 15 which cooperates with a correspondingly shaped valve seat surface on a valve needle 16 which is displaceable in the valve body 11. A lower section 17 of the valve needle 16 has a reduced diameter. so that an annulus 18 is formed between the valve body 11 and the section 17. The lower row of the nozzle bores 9 thus belongs with respect to fuel supply to the valve needle 16. This valve needle is pressed by a compression spring 20, fig. 1b, towards the valve seat surface 15, and the spring is supported over a spring plate 21 against the upper end of the valve needle 16.
25
The fuel supply to the upper row of the nozzle bores 8 is affected by a second hollow needle needle 22 which is slidable on the valve body 11 separating the two nozzle bore rows. To the upper row of the nozzle bores 8 there is in the part 3 a cone-shaped valve seat surface 25 which cooperates with a corresponding shaped seat surface on the lower end of the hollow valve needle 22. This hollow valve needle 22 is pressed by a compression spring 26 towards the seat surface 25 · The spring 26 147381 5- 1 rests over a spring plate 27 and a sleeve 2 $ on the upper end of the hollow needle 22. The upper end of the spring 26 abuts a spring plate 29 fixed in the valve body 1 above a hollow screw 31 'screwed into the flange 5. The hollow screw 31 surrounds the upper ends of the concentrically arranged compression springs 12 and 20 which abut an additional hollow screw 32 which is screwed in screw 31. In screw 32, a screw 33 is screwed in, which at its lower end forms a centering for the inner compression spring 20, while the hollow screw 32 for centering the compression spring 12 has a step-shaped reduced section 32 *.
15 For fuel supply to the two rows of nozzle bores 8 and 9, in the nozzle body 1 there is a fuel supply channel for each row, respectively 35 and 45. The channel 35 begins radially in the flange 5 and then extends longitudinally through the parts 2 and 3 of the valve 20. tillegemet. The lower end of the channel 35 opens into an annular space 36 which is in the direction of flow above the valve seat surface 25 and is formed between the hollow valve needle 22 and the part 3. The channel 45 also starts radially in the flange 5 and extends longitudinally 25 through the parts 2 and 3 in the valve body 1. The lower end of the duct 45 opens into an annulus 37 formed in the portion 3. In the annulus 37, several radial holes 38 extend through the hollow valve needle 22 surrounding the valve body 11. In the annulus region. At the 30 gauge 39, the valve body 11 has several radial holes 40 which form a connection with the annulus 18. Below the annulus 39 there is an additional annulus in the hollow needle 22 to which further annulus is connected upwardly from the injection valve 6 U7 381. 1 leading suction duct to prevent fuel. from the annulus 39 along the sliding surfaces of the hollow needle 22 and the valve body 11 reaching the row of the nozzle bores 8.
5
The two ducts 35 and '45 are connected to a common fuel pump, not shown, since there is also a control slider, not shown, which, depending on the load, connects one of the two ducts 35 and 45 to the two ducts. the pressure side of the fuel pump.
At full load of the motor, for example, the bottom row of, for example, eleven nozzle bores 9 is in operation. In this case, fuel under high pressure 15 flows through channel 45 and reaches over annulus 37, holes 38, annulus 39 and holes 40 into annulus 18.
The pressure from the fuel lifts the valve needle 16 away from the valve seat surface 15 so that fuel then flows over the nozzle bores 9 into the combustion chamber 7 ·
At partial load, the fuel supply to the duct 45 is blocked, but at the same time the fuel supply to the duct 35 is released. High-pressure fuel 25 thus enters the annulus 36, where the fuel lifts the hollow valve needle 22 up from the valve seat surface 25 so that the flow to the e.g. sixteen nozzle bores 8 becomes free and fuel over these bores flows into the combustion chamber 7 · 50
DK368478A 1977-09-01 1978-08-21 Injection valve for stamp combustion engines DK147381C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH1065277A CH623114A5 (en) 1977-09-01 1977-09-01
CH1065277 1977-09-01

Publications (3)

Publication Number Publication Date
DK368478A DK368478A (en) 1979-03-02
DK147381B true DK147381B (en) 1984-07-09
DK147381C DK147381C (en) 1985-01-28

Family

ID=4365412

Family Applications (1)

Application Number Title Priority Date Filing Date
DK368478A DK147381C (en) 1977-09-01 1978-08-21 Injection valve for stamp combustion engines

Country Status (9)

Country Link
JP (1) JPS5848748B2 (en)
CH (1) CH623114A5 (en)
DE (2) DE2759403C2 (en)
DK (1) DK147381C (en)
FR (1) FR2402079B1 (en)
GB (1) GB2003550B (en)
IT (1) IT1098732B (en)
NL (1) NL183667C (en)
SE (1) SE430353B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2943896A1 (en) * 1979-10-31 1981-05-14 Bosch Gmbh Robert FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES
DE2944339A1 (en) * 1979-11-02 1981-05-14 Volkswagenwerk Ag IC engine with two spark plugs per cylinder - has fuel injector directing separate fuel jets at plugs during idling
JPS5895788A (en) * 1981-12-03 1983-06-07 Tokyo Prefecture Controller for light emitting display
JPS58124660U (en) * 1982-02-16 1983-08-24
JPS6327093Y2 (en) * 1982-02-26 1988-07-22
DE3236046C2 (en) * 1982-09-29 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart, De
JPH0477148B2 (en) * 1983-06-17 1992-12-07 Mitsubishi Heavy Ind Ltd
JPS6018265U (en) * 1983-07-16 1985-02-07
JPH0224944Y2 (en) * 1983-10-31 1990-07-09
JPS6123862A (en) * 1984-07-10 1986-02-01 Toyota Motor Corp Fuel injection controller
DE3824467C2 (en) * 1988-07-19 1990-07-05 Man B & W Diesel Ag, 8900 Augsburg, De
DE4115478C2 (en) * 1990-05-17 1999-05-12 Avl Verbrennungskraft Messtech Injection nozzle for an internal combustion engine
DE4023223A1 (en) * 1990-07-21 1992-01-23 Bosch Gmbh Robert FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES
DE19630204B4 (en) * 1996-07-26 2005-04-14 Man B & W Diesel Ag Fuel injector
DE19758066A1 (en) * 1997-12-29 1999-07-01 Steyr Daimler Puch Ag Pump nozzle type with open injection nozzle
DE10040738B4 (en) * 1999-08-19 2012-12-13 Avl List Gmbh Injection device for an internal combustion engine with an injection nozzle designed as a double needle nozzle
KR101148683B1 (en) * 2010-06-07 2012-05-21 현대중공업 주식회사 Dual fuel injector valve by hybrid nozzle with dual fuel injection valve for diesel and gas engine
US20120255523A1 (en) * 2011-04-08 2012-10-11 Caterpillar Inc. Dual fuel injector and engine using same
FI124743B (en) * 2012-10-18 2015-01-15 Wärtsilä Finland Oy Fuel Injection Arrangement
GB201309122D0 (en) 2013-05-21 2013-07-03 Delphi Tech Holding Sarl Fuel Injector
US10900450B1 (en) 2019-08-05 2021-01-26 Caterpillar Inc. Fuel system, fuel injector nozzle assembly, and engine head assembly structured for ducted fuel injection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1607805A (en) * 1926-11-23 op milwaukee
GB542844A (en) * 1940-07-25 1942-01-29 George Stephen Kammer Improvements relating to fuel injection in internal combustion engines
GB549419A (en) * 1941-04-18 1942-11-20 Nat Gas And Oil Engine Company Improvements in or relating to injection nozzles for internal-combustion engines
DE1042964B (en) * 1954-06-11 1958-11-06 Kloeckner Humboldt Deutz Ag Fuel injector for internal combustion engines
US3339848A (en) * 1965-10-20 1967-09-05 Int Harvester Co Fuel injection nozzle
AT283059B (en) * 1966-10-28 1970-07-27 Bosch Gmbh Robert Fuel injector
DE7025384U (en) * 1970-07-07 1971-08-12 Maschf Augsburg Nuernberg Ag FUEL INJECTION VALVE FOR PISTON ENGINE WITH PRE-INJECTION AND MAIN INJECTION.
DD102198A1 (en) * 1973-02-02 1973-12-05
JPS5158216U (en) * 1974-10-31 1976-05-07
DE2711390A1 (en) * 1977-03-16 1978-09-21 Bosch Gmbh Robert FUEL INJECTOR

Also Published As

Publication number Publication date
FR2402079B1 (en) 1985-08-16
IT1098732B (en) 1985-09-07
CH623114A5 (en) 1981-05-15
DK368478A (en) 1979-03-02
NL7808497A (en) 1979-03-05
NL183667B (en) 1988-07-18
FR2402079A1 (en) 1979-03-30
GB2003550B (en) 1982-10-20
NL183667C (en) 1988-12-16
DE2759403C2 (en) 1988-09-29
IT7827194D0 (en) 1978-08-31
GB2003550A (en) 1979-03-14
SE7809201L (en) 1979-03-02
SE430353B (en) 1983-11-07
DK147381C (en) 1985-01-28
JPS5848748B2 (en) 1983-10-31
JPS5447028A (en) 1979-04-13
DE2740880A1 (en) 1979-03-15

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