US2595639A - Fuel injection apparatus - Google Patents

Fuel injection apparatus Download PDF

Info

Publication number
US2595639A
US2595639A US59504A US5950448A US2595639A US 2595639 A US2595639 A US 2595639A US 59504 A US59504 A US 59504A US 5950448 A US5950448 A US 5950448A US 2595639 A US2595639 A US 2595639A
Authority
US
United States
Prior art keywords
nozzle
tip
fuel
valve
seat
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
Application number
US59504A
Inventor
Theodore S Chmura
Jr George B Wood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ambac International Corp
Original Assignee
American Bosch Arma Corp
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
Application filed by American Bosch Arma Corp filed Critical American Bosch Arma Corp
Priority to US59504A priority Critical patent/US2595639A/en
Application granted granted Critical
Publication of US2595639A publication Critical patent/US2595639A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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

  • This invention relates to fuel injection apparatus and relates particularly to a new and improved form of fuel injection nozzle;
  • An object of the invention is to provide a new and improved fuel injection nozzle which is relatively simple and economical in construction yet eflicient in operation.
  • Another object of the invention is to provide a new and improved fuel injection nozzle having a self-seating or centering valve.
  • Another object of the invention is to provide a new and improved fuel injection nozzle wherein the alignment between the bore for the valve stem and the seat for the valve tip need not be in perfect alignment to prevent leakage because of the self-aligning or seating construction of the valve tip.
  • Another object of the invention is to provide a fuel injection nozzle of the type set forth wherein the extreme accuracy required for obtaining seat concentricity with the valve bore is eliminated.
  • Another object of the invention is to provide a fuel injection nozzle of the type set forth wherein the valve tip may be interchanged without need for changing of the valve body.
  • Fig. 1 is an exploded sectional view of one form of nozzle embodying the invention
  • Fig. 2 is a sectional view of a nozzle generally similar to that shown in Fig. l but with a slightly different nozzle tip;
  • Fig. 3 is a sectional view of a modified form of nozzle embodying the invention.
  • Fig. 1 a multiple hole type nozzle embodying the invention and which consists of the nozzle body I having the central bore 2 and the supply duct 3 adapted to supply fuel to the sump t in the nozzle tip which has a, plurality of openings 5 through which fuel is adapted to be supplied to the combustion chamber.
  • valve actuating member or piston G is adapted to be positioned within the bore 2 as shown in Fig. 2.
  • This member 6 has the leak-off groove 1 and the leak-off duct 8 for the purpose hereinafter described.
  • the nozzle embodying the invention comprises 2 a separate self-centering valve tip 9 having the seat It adapted to seat on the seat I I of the nozzle 1 to control the flow of fuel through the nozzle.
  • the coupling I2 is provided for securing the nozzle on the nozzle holder as hereinafter described.
  • the nozzle comprises a tubular support l3 in which is positioned the nozzle body M over the seat member I 5 which is adapted to be supported by the flange 16 on the body l3 and having the single central opening I! for the discharge of fuel into the combustion chamber.
  • tubular support [3 is provided with the threaded extension 18 for securing the nozzle to the nozzle holder as hereinafter described.
  • the bore 2 is provided in the nozzle body l4 and adapted to receive the valve actuating member Bas previously described in connection with the form of the invention shown in Fig. 1 and the member [5 is provided with the seat l9 adapted to be engaged by the seat Ill on the valve tip 9 to control the flow of fuel to the combustion chamber.
  • nozzle holder 26 In Fig. 3 is shown a nozzle holder 26, a fuel supply line 2i, pressure adjusting spring 22 and screw 23 for adjusting the spring 22.
  • the nozzle holder 20 is provided with the usual leak-off connection 24.
  • the tubular support 25 has a threaded portion 2%; adjacent theend thereof and corresponding to the threaded portion l3-on the nozzle support [3 and is adapted to engage a correspondingly threaded portion 21'on the adjacent end of the nozzle holder 20.
  • the nozzle holder 20 is adapted for use with the nozzle construction shown in Figs. 1, 2 or 3 and in the case of Fig. 1 is secured to the nozzle I by the coupling l2 and in the case of Fig. 2 is secured to the nozzle support l3 by the threaded extension [8 and the seat 28 for the pressure adjusting spring 22 which is adapted to engage the member 6 in the form of the invention shown in Figs. 1 and 2 in a similar manner to that in which it engages the valve actuating member 29 in Fig. 3.
  • the nozzle tip 39 has a peripheral flange 3! adapted to engage the peripheral flange 32 on the member 25 whereby the nozzle tip is positioned in operative position and adapted to discharge fuel into the combustion chamber through the openings 33.
  • the member 34 is provided with the central bore 35 adapted to receive the valve stem 29 which engages the cup-shaped portion 36 on the upper end of the valve tip 31.
  • the nozzle tip 30 is provided with the seat 38 adapted to be enga d by the seat 39 on the valve tip 31 to control the flow of fuel through the openings 33 to the combustion chamber.
  • valve is provided with a separate detachable tip which is self-aligning in its seat in the nozzle tip and, therefore, it is not necessary that the seat for the nozzle tip be perfectly aligned or concentric with the valve bore.
  • valve actuating member or piston 6 is actuated by the force of spring 22 and engages the upper end of the nozzle tips and normally retains the valve tips 9 or 31, in the constructions of Figs. 1 and 2, and Fig. 3 respectively in closed position until said valve tips are raised off their seats by the fuel pressure in which event they remain off their seats until the fuel pressure drops below the force of the spring 22 and the tips are then again forced into closed position.
  • a nozzle having a bore and an opening for permitting the passage of fuel therefrom, a valve actuating member insaid bore and a tip separate from said member and adapted to control the flow of fuel through said opening, said tip 'being retained in engagement with said valve actuating member by fluid pressure only, and a leak-01f duct in said member to relieve any fuel pressure between said member and said tip.
  • a nozzle having a bore and an opening for permitting the passage of fuel therefrom, a valve actuating member in said bore and a tip separate from said member and adapted to control the flow of fuel through said opening, and a co-mating connection between said member and tip whereby said member Will be retained in engagement with said tip but said tip will be allowed to center I the flow of fuel through said opening, said tip being retained in engagement with said valve actuating member by fluid pressure only, and a leak-off duct extending longitudinally through said member.
  • a nozzle including a bore and an opening for the passage of fuel therefrom, a seat adjacent said opening, a valve actuating member in said bore and a separate valve tip having a seat adapted to engage said seat adjacent said opening to control the flow of fuel through said opening, and a co-mating connection between said valve actuating member and tip whereby said member will be retained in engagement with said tip but said tip will be allowed to center itself to close said opening, said tip being retained in engagement with said valve actuating member by fluid pressure only, and a duct through said member to relieve any fuel pressure from said co-mating connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

May 6, 1952 T. s. CHMURA ETAL 2,595,539
FUEL INJECTION APPARATUS Filed Nov. 12, 1948 1 1' INVENTORS.
THEODORE s. CHMU'IZA OEGE. B wooD,Jr2.
/ A TTOP/VL'X Patented May 6, 1952 FUEL INJECTION APPARATUS Theodore S. Qhmura,
Wood, in,
Mass.,
Ghicopee, and George B.
Springfield, Mass assignors to American Bosch Corporation,
Springfield,
a corporation of New York 1 Application November 12, 1948, Serial No. 59,504
4 Claims. 1
This invention relates to fuel injection apparatus and relates particularly to a new and improved form of fuel injection nozzle;
An object of the invention is to provide a new and improved fuel injection nozzle which is relatively simple and economical in construction yet eflicient in operation.
Another object of the invention is to provide a new and improved fuel injection nozzle having a self-seating or centering valve.
Another object of the invention is to provide a new and improved fuel injection nozzle wherein the alignment between the bore for the valve stem and the seat for the valve tip need not be in perfect alignment to prevent leakage because of the self-aligning or seating construction of the valve tip.
Another object of the invention is to provide a fuel injection nozzle of the type set forth wherein the extreme accuracy required for obtaining seat concentricity with the valve bore is eliminated.
Another object of the invention is to provide a fuel injection nozzle of the type set forth wherein the valve tip may be interchanged without need for changing of the valve body.
Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings and it will be understood that changes may be made in the details of construction and arrangement of parts, as the preferred forms have been given by way of illustration only.
Referring to the drawings:
Fig. 1 is an exploded sectional view of one form of nozzle embodying the invention;
Fig. 2 is a sectional view of a nozzle generally similar to that shown in Fig. l but with a slightly different nozzle tip; and
Fig. 3 is a sectional view of a modified form of nozzle embodying the invention.
Referring to the drawings wherein similar reference characters designate corresponding parts throughout the several views, there is shown in Fig. 1 a multiple hole type nozzle embodying the invention and which consists of the nozzle body I having the central bore 2 and the supply duct 3 adapted to supply fuel to the sump t in the nozzle tip which has a, plurality of openings 5 through which fuel is adapted to be supplied to the combustion chamber.
The valve actuating member or piston G is adapted to be positioned within the bore 2 as shown in Fig. 2. This member 6 has the leak-off groove 1 and the leak-off duct 8 for the purpose hereinafter described.
The nozzle embodying the invention comprises 2 a separate self-centering valve tip 9 having the seat It adapted to seat on the seat I I of the nozzle 1 to control the flow of fuel through the nozzle.
The coupling I2 is provided for securing the nozzle on the nozzle holder as hereinafter described.
In the form of the invention shown in Fig. 2, the nozzle comprises a tubular support l3 in which is positioned the nozzle body M over the seat member I 5 which is adapted to be supported by the flange 16 on the body l3 and having the single central opening I! for the discharge of fuel into the combustion chamber.
In this form of the invention the tubular support [3 is provided with the threaded extension 18 for securing the nozzle to the nozzle holder as hereinafter described.
In this form of the invention the bore 2 is provided in the nozzle body l4 and adapted to receive the valve actuating member Bas previously described in connection with the form of the invention shown in Fig. 1 and the member [5 is provided with the seat l9 adapted to be engaged by the seat Ill on the valve tip 9 to control the flow of fuel to the combustion chamber.
In Fig. 3 is shown a nozzle holder 26, a fuel supply line 2i, pressure adjusting spring 22 and screw 23 for adjusting the spring 22. The nozzle holder 20 is provided with the usual leak-off connection 24.
The tubular support 25 has a threaded portion 2%; adjacent theend thereof and corresponding to the threaded portion l3-on the nozzle support [3 and is adapted to engage a correspondingly threaded portion 21'on the adjacent end of the nozzle holder 20.
The nozzle holder 20 is adapted for use with the nozzle construction shown in Figs. 1, 2 or 3 and in the case of Fig. 1 is secured to the nozzle I by the coupling l2 and in the case of Fig. 2 is secured to the nozzle support l3 by the threaded extension [8 and the seat 28 for the pressure adjusting spring 22 which is adapted to engage the member 6 in the form of the invention shown in Figs. 1 and 2 in a similar manner to that in which it engages the valve actuating member 29 in Fig. 3.
In the form of the invention shown in Fig. 3, the nozzle tip 39 has a peripheral flange 3! adapted to engage the peripheral flange 32 on the member 25 whereby the nozzle tip is positioned in operative position and adapted to discharge fuel into the combustion chamber through the openings 33.
The member 34 is provided with the central bore 35 adapted to receive the valve stem 29 which engages the cup-shaped portion 36 on the upper end of the valve tip 31. The nozzle tip 30 is provided with the seat 38 adapted to be enga d by the seat 39 on the valve tip 31 to control the flow of fuel through the openings 33 to the combustion chamber.
It will be seen that in each form of the invention shown the valve is provided with a separate detachable tip which is self-aligning in its seat in the nozzle tip and, therefore, it is not necessary that the seat for the nozzle tip be perfectly aligned or concentric with the valve bore.
Also, because of the leak-off duct 8, fuel pressure behind the tips 9 and 31 will be relieved thereby allowing the valve tip to remain in contact with the valve stem at all times as a definite force differential is created on the ends of the tip from hydraulic pressure of the fuel.
The valve actuating member or piston 6 is actuated by the force of spring 22 and engages the upper end of the nozzle tips and normally retains the valve tips 9 or 31, in the constructions of Figs. 1 and 2, and Fig. 3 respectively in closed position until said valve tips are raised off their seats by the fuel pressure in which event they remain off their seats until the fuel pressure drops below the force of the spring 22 and the tips are then again forced into closed position.
From the foregoing it will be seen that we have provided simple, efiicient and economical means for obtaining all of the objects and advantages of the invention.
Having described our invention, we claim:
1. In a device of the character described, a nozzle having a bore and an opening for permitting the passage of fuel therefrom, a valve actuating member insaid bore and a tip separate from said member and adapted to control the flow of fuel through said opening, said tip 'being retained in engagement with said valve actuating member by fluid pressure only, and a leak-01f duct in said member to relieve any fuel pressure between said member and said tip.
2. In a device of the character described, a nozzle having a bore and an opening for permitting the passage of fuel therefrom, a valve actuating member in said bore and a tip separate from said member and adapted to control the flow of fuel through said opening, and a co-mating connection between said member and tip whereby said member Will be retained in engagement with said tip but said tip will be allowed to center I the flow of fuel through said opening, said tip being retained in engagement with said valve actuating member by fluid pressure only, and a leak-off duct extending longitudinally through said member.
4. In a device of the character described, a nozzle including a bore and an opening for the passage of fuel therefrom, a seat adjacent said opening, a valve actuating member in said bore and a separate valve tip having a seat adapted to engage said seat adjacent said opening to control the flow of fuel through said opening, and a co-mating connection between said valve actuating member and tip whereby said member will be retained in engagement with said tip but said tip will be allowed to center itself to close said opening, said tip being retained in engagement with said valve actuating member by fluid pressure only, and a duct through said member to relieve any fuel pressure from said co-mating connection.
THEODORE S. CHMURA. GEORGE E. WOOD, JR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,490,734 Day Apr. 15, 1924 1,638,032 Himmelsbach Aug. 9, 1927 1,901,723 Belyavin Mar. 14, 1933 2,380,148 Camner July 10, 1945 FOREIGN PATENTS Number Country Date 358,340 Great Britain Oct. 8, 1941 777,261 France Nov. 26, 1934
US59504A 1948-11-12 1948-11-12 Fuel injection apparatus Expired - Lifetime US2595639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US59504A US2595639A (en) 1948-11-12 1948-11-12 Fuel injection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59504A US2595639A (en) 1948-11-12 1948-11-12 Fuel injection apparatus

Publications (1)

Publication Number Publication Date
US2595639A true US2595639A (en) 1952-05-06

Family

ID=22023382

Family Applications (1)

Application Number Title Priority Date Filing Date
US59504A Expired - Lifetime US2595639A (en) 1948-11-12 1948-11-12 Fuel injection apparatus

Country Status (1)

Country Link
US (1) US2595639A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705663A (en) * 1952-08-08 1955-04-05 Robert I Gilbreath Spray gun
US3980234A (en) * 1975-06-13 1976-09-14 Stanadyne, Inc. Fuel injection nozzle
US4186884A (en) * 1978-01-11 1980-02-05 Lucas Industries Limited Liquid fuel injection nozzles
US4375274A (en) * 1979-07-28 1983-03-01 Daimler-Benz Aktiengesellschaft Choke pin nozzle
US4583687A (en) * 1983-07-09 1986-04-22 Lucas Industries Public Limited Company Fuel injection nozzle
US4976245A (en) * 1988-09-21 1990-12-11 Toyota Jidosha Kabushiki Kaisha Unit injector
US6109540A (en) * 1998-10-29 2000-08-29 Caterpillar Inc. Outwardly opening nozzle valve for a fuel injector
DE19950223A1 (en) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Injector for common rail injection system for IC engines has end face of valve piston larger than hole, this being larger than sealing line between needle and needle seat

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490734A (en) * 1923-03-10 1924-04-15 Day Charles Fuel valve for internal-combustion engines
US1638032A (en) * 1924-02-27 1927-08-09 Krupp Ag Fuel-injection device for internal-combustion engines
GB358340A (en) * 1930-11-19 1931-10-08 Lang Franz Fuel injection valves for internal combustion engines
US1901723A (en) * 1929-01-28 1933-03-14 Belyavin Paul Internal combustion engine
FR777261A (en) * 1933-11-04 1935-02-15 Improvements to fuel injectors for internal combustion engines
US2380148A (en) * 1940-07-08 1945-07-10 Atlas Diesel Ab Fuel injecting means for internalcombustion engines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490734A (en) * 1923-03-10 1924-04-15 Day Charles Fuel valve for internal-combustion engines
US1638032A (en) * 1924-02-27 1927-08-09 Krupp Ag Fuel-injection device for internal-combustion engines
US1901723A (en) * 1929-01-28 1933-03-14 Belyavin Paul Internal combustion engine
GB358340A (en) * 1930-11-19 1931-10-08 Lang Franz Fuel injection valves for internal combustion engines
FR777261A (en) * 1933-11-04 1935-02-15 Improvements to fuel injectors for internal combustion engines
US2380148A (en) * 1940-07-08 1945-07-10 Atlas Diesel Ab Fuel injecting means for internalcombustion engines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705663A (en) * 1952-08-08 1955-04-05 Robert I Gilbreath Spray gun
US3980234A (en) * 1975-06-13 1976-09-14 Stanadyne, Inc. Fuel injection nozzle
US4186884A (en) * 1978-01-11 1980-02-05 Lucas Industries Limited Liquid fuel injection nozzles
US4375274A (en) * 1979-07-28 1983-03-01 Daimler-Benz Aktiengesellschaft Choke pin nozzle
US4583687A (en) * 1983-07-09 1986-04-22 Lucas Industries Public Limited Company Fuel injection nozzle
US4976245A (en) * 1988-09-21 1990-12-11 Toyota Jidosha Kabushiki Kaisha Unit injector
US6109540A (en) * 1998-10-29 2000-08-29 Caterpillar Inc. Outwardly opening nozzle valve for a fuel injector
DE19950223A1 (en) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Injector for common rail injection system for IC engines has end face of valve piston larger than hole, this being larger than sealing line between needle and needle seat

Similar Documents

Publication Publication Date Title
US4958771A (en) Injection nozzle
EP0493555B1 (en) Valve for the metered addition of volatilized fuel to the fuel/air mixture in an internal-combustion engine
US2595639A (en) Fuel injection apparatus
US2410946A (en) Fuel injection mechanism
US2154875A (en) Fuel injector
US2376292A (en) Fuel injection nozzle
US1755192A (en) Atomizing valve
US2351965A (en) Nozzle
US1257070A (en) Automatic valve.
US2556369A (en) Accumulator type injection nozzle
US2084057A (en) Fuel injector
US1786330A (en) Valve device
US3364863A (en) Fuel injection system
US992375A (en) Valve.
US2768860A (en) Nozzle
US2665167A (en) Fuel injection nozzle
US1221702A (en) Valve construction.
US3350016A (en) Frictionally held burner plug insert for gas lighters
US1806565A (en) of detroit
US2040846A (en) Fuel injection system for internal combustion engines
US2860010A (en) Fuel injection nozzle
US2119966A (en) Atomizing valve
US2552658A (en) Nozzle for gas turbines
US2445269A (en) Combined injector nozzle and filter
US2210783A (en) Spray injection nozzle