US2231937A - Injection nozzle for internal combustion engines - Google Patents
Injection nozzle for internal combustion engines Download PDFInfo
- Publication number
- US2231937A US2231937A US240822A US24082238A US2231937A US 2231937 A US2231937 A US 2231937A US 240822 A US240822 A US 240822A US 24082238 A US24082238 A US 24082238A US 2231937 A US2231937 A US 2231937A
- Authority
- US
- United States
- Prior art keywords
- nozzle
- cooling
- combustion engines
- internal combustion
- nozzle body
- 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 - Lifetime
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/07—Nozzles and injectors with controllable fuel supply
- F02M2700/074—Injection valve actuated by fuel pressure for pressurised fuel supply
Definitions
- The, present invention relates to cooled injection nozzles for internal'combustion engines, of the type having a nozzle body in which the end from which the fuel passes into the cylinder of the engine is so enclosed by a cooling jacket, that between the cooling jacket and the nozzle body there is formed a hollow space for the reception of a cooling liquid.
- an injec-' tion nozzle for internal combustion engines is provided with a substantially cylindrical jacket surrounding its fuel outlet end, through which jacket a cooling fluid is circulated, said jacket be ing firmly connected with the said nozzle around 20 the fuel outlet point and sealed at its opposite end by a suitable nut to the outside of the body of said nozzle.
- Figure 1 is a longitudinal section through a nozzle on the line 1-1 in Figure 2.
- Figure 2 is a cross section on the line II in Figure 1
- Figure 3 is a longitudinal section on the line III-III in Figure 2.
- Figure 4 is a cross section on the line IVIV in Figure 1, and
- Figure 5 is a longitudinal section through a 35 modified form of construction of a nozzle.
- Numeral l is a nozzle holder, to the end surface 2 of which a nozzle body 3 is attached.
- a 40 nozzle needle 4 which is pressed on to a seating surface 5 by a spring.
- the fuel passes through a conduit 6 provided in the nozzle holder into a conduit 1 in the nozzle body 3. From here, the fuel flows through annular spaces 8, 9 towards the 45 seating surface 5 of the nozzle and, as soon as the pressure from the injection pump (not shown) has become large enough to overcome the force of the said spring, it raises the nozzle needle 4, so that fuel is injected at Ill into the cylinder of the to engine or into a primary chamber or the like.
- the nozzle body 3 Surrounding the orifice ill, the nozzle body 3 is firmly connected by braz ng with one end of acooling jacket II.
- the other end l2 of the cooling jacket ll is constructed as a flange which is bindingly pressed against a shoulder M on the nozzle body 3 by a cap nut l3.
- it is desirable to effect the brazing in a tightly clamped condition.- Welding may be'em- 6 ployed for connecting the parts with each other, if desired, instead of brazing. 7
- the nozzle body 3 is reducedin diameter where it is surrounded by the cooling jacket I I; such that its cross section has substantially the shape shown 10 in Figure 4.
- a hollow space l5 has been provided for the reception of a cooling liquid.
- the hollow space I5 is of a horse shoe section intersected by a bar [6, which, according to Figures 3 and 4, consists of one piece with the nozzle body 3 and bears tightly on the inner wall of the cooling jacket ll.
- a conduit H is provided in the bar I6 which is connected between the hollow space-l5 through a .part of the jacket in the direction of the arrow 20 in the immediate vicinity of the part to be cooled.
- leads from above the hollow space l5 and leads through a conduit 22 in the nozzle holder to the cooling oil return pipe (not shown).
- begins on that side of the bar' l6 which is' opposite to the conduit l8.
- the cooling medium is consequently forced to traverse the entire hollow space l5 from the lower end of the one side of the bar lB-to the upper end of the other side of the bar l6 and to cool the en- 40.
- a fuel injection nozzle for internal combustion engines including a nozzle body and a cooling'jacket surrounding its fuel outlet end, in which a. bar or rib extends .axially of, and projects wall of the cooling jacket, so as to form a seal therewith providing a single longitudinal partition end of the nozzle body.
- a fuel injection nozzle as claimed in claim 1 having a conduit for the return of the cooling fluid
- a fuel injection nozzle as claimed in claim 1. having a conduit for the return of cooling fluid from the hollow space, and in which the bar or rib is formed in one piece with the nozzle body, and the outlet end of the passage for the supply of cooling fluid to the space is located on one side surface of 'the rib, while the inlet to the return conduit from the hollow space is located at the opposite side of the bar or rib and remote from the outlet end of the supply passage.
- a fuel injection nozzle as claimed in claim 1 in which a movable needle valve is pressed under spring pressure onto a seating surface formed in the nozzle body, and in which the outlet opening for the cooling fluid supply is provided in the bar in the region of the plane of the seating surface and is directed substantially tangentially of the curvature of the nozzle body periphery.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Feb. 18, 1941. MEYER ETAL 2,231,937
INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES Filed Nov. 16, 1958 lliilflllfl Jaye/7mm:
Patented Feb. 18, 1941 UNITED STATES:
PATIENT OFFICE 2,231,937 INJECTION NOZZLE FOR-INTERNAL ooM- BUSTION ENGINES.
Application November 16, 1938, Serial No. 240.822
' v .In Germany December 14, 1937 4 Claims.
The, present invention relates to cooled injection nozzles for internal'combustion engines, of the type having a nozzle body in which the end from which the fuel passes into the cylinder of the engine is so enclosed by a cooling jacket, that between the cooling jacket and the nozzle body there is formed a hollow space for the reception of a cooling liquid.
The purpose of the invention is to achieve cf- 10 fective cooling by simple means and, despite limited space conditions, to bring comparatively large amounts of cooling medium into the vicinity of the points to be cooled. According to the present invention an injec-' tion nozzle for internal combustion engines is provided with a substantially cylindrical jacket surrounding its fuel outlet end, through which jacket a cooling fluid is circulated, said jacket be ing firmly connected with the said nozzle around 20 the fuel outlet point and sealed at its opposite end by a suitable nut to the outside of the body of said nozzle.
The invention is more particularly described with reference to the accompanying drawing, in
25 which:
Figure 1 is a longitudinal section through a nozzle on the line 1-1 in Figure 2.
Figure 2 is a cross section on the line II in Figure 1,
60 Figure 3 is a longitudinal section on the line III-III in Figure 2.
Figure 4 is a cross section on the line IVIV in Figure 1, and
Figure 5 is a longitudinal section through a 35 modified form of construction of a nozzle.
In the drawing:
Numeral l is a nozzle holder, to the end surface 2 of which a nozzle body 3 is attached. In the interior of the nozzle body 3 is disposed a 40 nozzle needle 4, which is pressed on to a seating surface 5 by a spring. The fuel passes through a conduit 6 provided in the nozzle holder into a conduit 1 in the nozzle body 3. From here, the fuel flows through annular spaces 8, 9 towards the 45 seating surface 5 of the nozzle and, as soon as the pressure from the injection pump (not shown) has become large enough to overcome the force of the said spring, it raises the nozzle needle 4, so that fuel is injected at Ill into the cylinder of the to engine or into a primary chamber or the like.
Surrounding the orifice ill, the nozzle body 3 is firmly connected by braz ng with one end of acooling jacket II. The other end l2 of the cooling jacket ll is constructed as a flange which is bindingly pressed against a shoulder M on the nozzle body 3 by a cap nut l3. In order to obtain eflicient tightness without bending of the parts despite the heating during the soldering process, it is desirable to effect the brazing in a tightly clamped condition.- Welding may be'em- 6 ployed for connecting the parts with each other, if desired, instead of brazing. 7
The nozzle body 3 is reducedin diameter where it is surrounded by the cooling jacket I I; such that its cross section has substantially the shape shown 10 in Figure 4. By means of this reduction, a hollow space l5 has been provided for the reception of a cooling liquid. In the example of construction shown, the hollow space I5 is of a horse shoe section intersected by a bar [6, which, according to Figures 3 and 4, consists of one piece with the nozzle body 3 and bears tightly on the inner wall of the cooling jacket ll. As shown inFigure 3, a conduit H is provided in the bar I6 which is connected between the hollow space-l5 through a .part of the jacket in the direction of the arrow 20 in the immediate vicinity of the part to be cooled. As shown in Figure 3, a conduit 2| leads from above the hollow space l5 and leads through a conduit 22 in the nozzle holder to the cooling oil return pipe (not shown). As may be seen in Figure 2 and as indicated in "Figure 4, by the sign'X, the conduit 2| begins on that side of the bar' l6 which is' opposite to the conduit l8. The cooling medium is consequently forced to traverse the entire hollow space l5 from the lower end of the one side of the bar lB-to the upper end of the other side of the bar l6 and to cool the en- 40.
tire lower part of the nozzle eflectively. With this arrangement, despite the small space that is available especially in vehicle engines for installing the lower nozzle parts, a comparatively large cooling medium chamber can be utilised advantageously for the cooling. Further, the cooling jacket can be manufactured cheaply as a simple part, preferably as a pressed piece. For locking the nozzle body 3 relative to the nozzle holder l, as shown in Figures 1 and 2, a holding pin 23 is employed. 1 Another form of construction of the invention is shown in Figure 5. This (fillers from the form of construction according to Figures 1 to 4 only in that with this construction the cooling jacket Ila is tightened by means of the conical construction of the outer jacket by an appropriate inner cone 7 24 in the cap nut I3a instead of the flange as radially in one direction from the nozzle body it" self and bears with its outer surface on the inner used in the construction according to Figures 1 to 4.
We' declare that what we claim is:
l. A fuel injection nozzle for internal combustion engines, including a nozzle body and a cooling'jacket surrounding its fuel outlet end, in which a. bar or rib extends .axially of, and projects wall of the cooling jacket, so as to form a seal therewith providing a single longitudinal partition end of the nozzle body.
2. A fuel injection nozzle as claimed in claim 1, having a conduit for the return of the cooling fluid,
which conduit commences at that end of the,
hollow space'remote from the outlet end of the nozzle body.
3. A fuel injection nozzle as claimed in claim 1. having a conduit for the return of cooling fluid from the hollow space, and in which the bar or rib is formed in one piece with the nozzle body, and the outlet end of the passage for the supply of cooling fluid to the space is located on one side surface of 'the rib, while the inlet to the return conduit from the hollow space is located at the opposite side of the bar or rib and remote from the outlet end of the supply passage.
4. A fuel injection nozzle as claimed in claim 1, in which a movable needle valve is pressed under spring pressure onto a seating surface formed in the nozzle body, and in which the outlet opening for the cooling fluid supply is provided in the bar in the region of the plane of the seating surface and is directed substantially tangentially of the curvature of the nozzle body periphery.
ALFRED MEYER.
WALTER IJPPART.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2231937X | 1937-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2231937A true US2231937A (en) | 1941-02-18 |
Family
ID=7991437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US240822A Expired - Lifetime US2231937A (en) | 1937-12-14 | 1938-11-16 | Injection nozzle for internal combustion engines |
Country Status (1)
Country | Link |
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US (1) | US2231937A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425229A (en) * | 1940-10-11 | 1947-08-05 | Bendix Aviat Corp | Fuel injection apparatus |
US2699358A (en) * | 1950-07-18 | 1955-01-11 | Schweizerische Lokomotiv | Fuel injection nozzle for high-speed internal-combustion engines |
US3398936A (en) * | 1966-08-02 | 1968-08-27 | Curtiss Wright Corp | Fuel injection pintle |
FR2429900A1 (en) * | 1978-07-01 | 1980-01-25 | Lucas Industries Ltd | Fuel injection nozzle for diesel engine - has ring under tension applying compressive force outside annular fuel supply groove |
US4502196A (en) * | 1980-02-05 | 1985-03-05 | Heinz Kupper | Method for manufacturing an insulated fuel injection nozzle device |
US4566634A (en) * | 1982-09-21 | 1986-01-28 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Injection device for a diesel engine |
US7028918B2 (en) * | 2001-02-07 | 2006-04-18 | Cummins Engine Company, Inc. | Fuel injector having a nozzle with improved cooling |
-
1938
- 1938-11-16 US US240822A patent/US2231937A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425229A (en) * | 1940-10-11 | 1947-08-05 | Bendix Aviat Corp | Fuel injection apparatus |
US2699358A (en) * | 1950-07-18 | 1955-01-11 | Schweizerische Lokomotiv | Fuel injection nozzle for high-speed internal-combustion engines |
US3398936A (en) * | 1966-08-02 | 1968-08-27 | Curtiss Wright Corp | Fuel injection pintle |
FR2429900A1 (en) * | 1978-07-01 | 1980-01-25 | Lucas Industries Ltd | Fuel injection nozzle for diesel engine - has ring under tension applying compressive force outside annular fuel supply groove |
US4502196A (en) * | 1980-02-05 | 1985-03-05 | Heinz Kupper | Method for manufacturing an insulated fuel injection nozzle device |
US4566634A (en) * | 1982-09-21 | 1986-01-28 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Injection device for a diesel engine |
US7028918B2 (en) * | 2001-02-07 | 2006-04-18 | Cummins Engine Company, Inc. | Fuel injector having a nozzle with improved cooling |
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