US3780716A - Fuel injection systems - Google Patents

Fuel injection systems Download PDF

Info

Publication number
US3780716A
US3780716A US00226793A US22679372A US3780716A US 3780716 A US3780716 A US 3780716A US 00226793 A US00226793 A US 00226793A US 22679372 A US22679372 A US 22679372A US 3780716 A US3780716 A US 3780716A
Authority
US
United States
Prior art keywords
fuel
nozzle
accumulator
piston
valve means
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
US00226793A
Other languages
English (en)
Inventor
I Fenne
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.)
CAV Ltd
Original Assignee
CAV Ltd
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 CAV Ltd filed Critical CAV Ltd
Application granted granted Critical
Publication of US3780716A publication Critical patent/US3780716A/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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/0215—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by draining or closing fuel conduits

Definitions

  • F02m 39/00, F02m 49/07 tween the injector and the accumulator is a Piston [58] Field of Search 123/139 DP, 139 R, Slidable within a Cylinder, the Piston being urged in 123/19 139 AS one direction by the flow of fuel and in the event that the valve means fails and remains in the open position, 5 References Cited the piston moves a further amount into contact with a UNITED STATES PATENTS seating to prevent further flow of fuel through the no z- 2,0o7,s71 7/1935 Oldham 123/139 2,348,282 5/1944 Bremser 123/l39 5 Claims, 1 Drawing Figure FUEL INJECTION SYSTEMS
  • This invention relates to fuel injection systems for supplying fuel to internal combustion engines and of the kind comprising an accumulator in which fuel is stored under pressure, an injection nozzle through which fuel from the accumulator is directed into a combustion space of an engine, and valve means which is opened for a predetermined time to control the
  • valve means With such systems there is a danger that the valve means could remain in the open position due to some malfunction. In this event the accumulator will discharge its compressed volume of fuel into the engine through the nozzle and this could damage the engine.
  • the object of the present invention is to provide a system of the kind specified in a simple and convenient form and in which the maximum quantity of fuel which can be discharged to the engine through the nozzle is limited.
  • a valve operable to allow a normal flow of fuel to the engine, said valve closing to prevent more than a predetermined volume of fuel to flow to the engine.
  • a piston slidable within a cylinder, the piston being urged in one direction by the flow of fuel to the nozzle and in the event of failure of said valve means in the open position, the piston being urged an extra amount in said direction to co-operate with a seating thereby to prevent further flow of fuel through the nozzle.
  • the accumulator is connected to an injection nozzle 11 and through which fuel flows into a combustion space of an associated engine (not shown).
  • the actual quantity of fuel flowing through the nozzle is controlled by a valve means conveniently accommodated within the nozzle and arranged to be opened for a predetermined time. In this manner the quantity of fuel which is supplied to the engine is controlled.
  • valve in the form of a piston 12 which is located and slidable within a cylinder 13.
  • One end of the cylinder communicates with the accumulator and the other end of the cylinder communicates with the injection nozzle.
  • the piston 12 is loaded by a coiled compression spring 15 towards a step 16 defined on the wall of the cylinder.
  • a passage 17 incorporating a restriction 18 The passage 17 remote from the step 16 communicates with a transverse drilling formed in the piston.
  • the area of the seating is so arranged that the piston 12 will be retained upon the seating by the fluid pressure acting thereof and in this event no more fuel can be supplied to the nozzle 11.
  • the dimension of the restrictor 18 is carefully chosen as also is the rating of the spring, to ensure that the piston can return to its stop between the injection periods and the quantity of fuel which flows past the restrictor during the pumping stroke is kept to a minimum.
  • a fuel injection system for supplying fuel to an internal combustion engine and of the kind comprising an accumulator in which fuel is stored under pressure, an injection nozzle through which fuel can flow from the accumulator into a combustion space of the engine, valve means operable'for a predetermined time to control the quantity of fuel supplied through the nozzle, a further valve means disposed intermediate the accumulator and the nozzle, said further valve means being operable to allow normal flow of fuel to the engine, said further valve means closing to prevent more than a predetermined volume of fuel to flow to the engine.
  • a fuel injection system for supplying fuel to an internal combustion engine and of the kind comrpising an accumulator in which fuel is stored under pressure, an injection nozzle through which fuel can flow from the accumulator into a combustion space of the engine, valve means operable for a predetermined time to control the quantity of fuel supplied through the nozzle, a cylinder provided intermediate the accumulator and the nozzle, said cylinder having its opposite ends communicating with the accumulator and nozzle respectively, a piston slidable within said cylinder, a seating defined at the end of the cylinder communicating with said nozzle, the piston being urged in one direction by the flow of fuel to the nozzle and in the event of failure of said valve means in the open position, the piston being urged an extra amount in said one direction to co-operate with said seating thereby to prevent further flow of fuel through the nozzle.
  • a system according to claim 2 including resilient means loading said piston away from said seating.
  • a system as claimed in claim 3 including a passage placing the opposite ends of the cylinder in communication with each other, said passage incorporating a restrictor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US00226793A 1971-02-19 1972-02-16 Fuel injection systems Expired - Lifetime US3780716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB503271 1971-02-19

Publications (1)

Publication Number Publication Date
US3780716A true US3780716A (en) 1973-12-25

Family

ID=9788458

Family Applications (1)

Application Number Title Priority Date Filing Date
US00226793A Expired - Lifetime US3780716A (en) 1971-02-19 1972-02-16 Fuel injection systems

Country Status (6)

Country Link
US (1) US3780716A (enrdf_load_stackoverflow)
BR (1) BR7200906D0 (enrdf_load_stackoverflow)
DE (1) DE2207643A1 (enrdf_load_stackoverflow)
ES (1) ES177456Y (enrdf_load_stackoverflow)
FR (1) FR2125946A5 (enrdf_load_stackoverflow)
IT (1) IT954308B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246876A (en) * 1979-01-19 1981-01-27 Stanadyne, Inc. Fuel injection system snubber valve assembly
US5551403A (en) * 1994-08-04 1996-09-03 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Fuel supply quantity limiting arrangement
WO2000039452A3 (de) * 1998-12-28 2001-03-08 Bosch Gmbh Robert Kraftstoffeinspritzanlage
US20030000581A1 (en) * 2001-06-27 2003-01-02 Kai Lehtonen Fuel system shut-off valve
WO2004063558A1 (en) * 2003-01-15 2004-07-29 Wärtsilä Finland Oy Arrangement in fuel injection apparatus
US7661410B1 (en) * 2008-08-18 2010-02-16 Caterpillar Inc. Fluid leak limiter
WO2010130492A1 (de) * 2009-05-14 2010-11-18 Robert Bosch Gmbh Ventil für ein kraftstoffeinspritzsystem
EP3023628A1 (en) 2014-11-21 2016-05-25 O.M.T. Officine Meccaniche Torino S.p.A. A fuel flow limiting valve for large internal combustion engines
EP3146195B1 (en) * 2014-05-22 2019-07-24 Wärtsilä Finland Oy Connecting element for fuel injection system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918147A1 (de) * 1979-05-05 1980-11-20 Maschf Augsburg Nuernberg Ag Brennstoffeinspritzvorrichtung fuer eine brennkraftmaschine
FR2502701A1 (fr) * 1981-03-26 1982-10-01 Renault Vehicules Ind Systeme d'injection a pilotage de l'injecteur, pour un moteur a combustion interne
FR2558533B1 (fr) * 1984-01-23 1986-06-13 Renault Dispositif de securite pour soupape d'injection de moteur a combustion interne
DE4344190A1 (de) * 1993-12-23 1995-06-29 Orange Gmbh Kraftstoffeinspritzvorrichtung mit Hochdruck-Kraftstoffspeicher
DE4414242A1 (de) * 1994-04-23 1995-10-26 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19747092B4 (de) * 1997-10-24 2005-01-13 Siemens Ag Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen
AT513158B1 (de) * 2012-04-10 2014-03-15 Bosch Gmbh Robert Durchflussbegrenzer mit Kugel und Drossel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007871A (en) * 1932-08-06 1935-07-09 Oldham Richard Oil or other liquid fuel pump
US2090350A (en) * 1934-12-22 1937-08-17 Bosch Robert Injection internal combustion engine
US2348282A (en) * 1941-05-01 1944-05-09 Bendix Aviat Corp Fuel injection apparatus
US3481315A (en) * 1966-11-11 1969-12-02 Cav Ltd Liquid fuel supply systems for internal combustion engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007871A (en) * 1932-08-06 1935-07-09 Oldham Richard Oil or other liquid fuel pump
US2090350A (en) * 1934-12-22 1937-08-17 Bosch Robert Injection internal combustion engine
US2348282A (en) * 1941-05-01 1944-05-09 Bendix Aviat Corp Fuel injection apparatus
US3481315A (en) * 1966-11-11 1969-12-02 Cav Ltd Liquid fuel supply systems for internal combustion engines

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246876A (en) * 1979-01-19 1981-01-27 Stanadyne, Inc. Fuel injection system snubber valve assembly
US5551403A (en) * 1994-08-04 1996-09-03 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Fuel supply quantity limiting arrangement
WO2000039452A3 (de) * 1998-12-28 2001-03-08 Bosch Gmbh Robert Kraftstoffeinspritzanlage
US6374802B1 (en) * 1998-12-28 2002-04-23 Robert Bosch Gmbh Fuel injection system
US6953052B2 (en) * 2001-06-27 2005-10-11 Wartsila Technology Oy Ab Fuel system shut-off valve
US20030000581A1 (en) * 2001-06-27 2003-01-02 Kai Lehtonen Fuel system shut-off valve
CN100402833C (zh) * 2001-06-27 2008-07-16 瓦特西拉技术有限公司 燃料系统的关闭阀
WO2004063558A1 (en) * 2003-01-15 2004-07-29 Wärtsilä Finland Oy Arrangement in fuel injection apparatus
US20060096578A1 (en) * 2003-01-15 2006-05-11 Kai Lehtonen Arrangement in fuel injection apparatus
US7237533B2 (en) 2003-01-15 2007-07-03 Wartsila Finland Oy Arrangement in fuel injection apparatus
US7661410B1 (en) * 2008-08-18 2010-02-16 Caterpillar Inc. Fluid leak limiter
US20100037863A1 (en) * 2008-08-18 2010-02-18 Caterpillar Inc. Fluid leak limiter
WO2010130492A1 (de) * 2009-05-14 2010-11-18 Robert Bosch Gmbh Ventil für ein kraftstoffeinspritzsystem
EP3146195B1 (en) * 2014-05-22 2019-07-24 Wärtsilä Finland Oy Connecting element for fuel injection system
EP3023628A1 (en) 2014-11-21 2016-05-25 O.M.T. Officine Meccaniche Torino S.p.A. A fuel flow limiting valve for large internal combustion engines

Also Published As

Publication number Publication date
IT954308B (it) 1973-08-30
FR2125946A5 (enrdf_load_stackoverflow) 1972-09-29
DE2207643A1 (enrdf_load_stackoverflow) 1972-08-31
ES177456U (es) 1972-09-16
ES177456Y (es) 1973-03-01
BR7200906D0 (pt) 1973-05-03

Similar Documents

Publication Publication Date Title
US3780716A (en) Fuel injection systems
US6453875B1 (en) Fuel injection system which uses a pressure step-up unit
US3516395A (en) Fuel injection system for internal combustion engines
US3677256A (en) Fuel injection device for an internal combustion engine
US6619263B1 (en) Fuel injection system for an internal combustion engine
US6675773B1 (en) Method and apparatus for performing a fuel injection
US6814057B2 (en) Fuel injection device
US3625192A (en) Fuel injection nozzle with hydraulic valve-closing means
SE522351C2 (sv) Bränsleinsprutningssystem för en förbränningsmotor
US3308794A (en) Engine fuel system
GB1346501A (en) Fuel injection valves for internal combustion engines
US3438359A (en) Pilot injection for diesel engines
US3763832A (en) Injection system for internal combustion engine
US3456629A (en) Fuel injection devices for compression ignited internal combustion engines
US2283725A (en) Fuel-injection nozzle valve
US3893629A (en) Fuel injection device for diesel engines
US3667438A (en) Fuel injecting device for an internal combustion engine
US1919601A (en) Fuel injection device for internal combustion engines
US1701089A (en) Control of fuel-injection mechanism for internal-combustion engines
US6718947B1 (en) Fuel injection method and systems for an internal combustion engine
US1843410A (en) Fuel injection device for internal combustion engines
US20040003794A1 (en) Fuel-injection device
GB762684A (en) Improvements in and relating to liquid fuel injection equipment for internal combustion engines
US1511484A (en) Combination metering pump and fuel spray valve
US2912935A (en) Fuel injection pump