GB874357A - Improvements in or relating to diaphragm carburettors - Google Patents

Improvements in or relating to diaphragm carburettors

Info

Publication number
GB874357A
GB874357A GB41232/59A GB4123259A GB874357A GB 874357 A GB874357 A GB 874357A GB 41232/59 A GB41232/59 A GB 41232/59A GB 4123259 A GB4123259 A GB 4123259A GB 874357 A GB874357 A GB 874357A
Authority
GB
United Kingdom
Prior art keywords
fuel
throttle
chamber
metering
bore
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
Application number
GB41232/59A
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.)
Tillotson Manufacturing Co
Original Assignee
Tillotson Manufacturing Co
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 US780845A priority Critical patent/US3003754A/en
Application filed by Tillotson Manufacturing Co filed Critical Tillotson Manufacturing Co
Publication of GB874357A publication Critical patent/GB874357A/en
Expired legal-status Critical Current

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
    • F02M9/00Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/02Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage
    • F02M9/06Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage with means for varying cross-sectional area of fuel spray nozzle dependent on throttle position
    • 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
    • F02M17/00Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02Floatless carburettors
    • F02M17/04Floatless carburettors having fuel inlet valve controlled by diaphragm
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00Gas and liquid contact apparatus
    • Y10S261/68Diaphragm-controlled inlet valve

Abstract

874,357. Spray carburetters. TILLOTSON MANUFACTURING CO. Dec. 4, 1959 [Dec. 16, 1958], No. 41232/59. Class 7(3). A carburetter comprises, a body 10, Figs. 2 and 4, formed with a mixing passage 12, a throttle valve 26 movably disposed in the mixing passage, a fuel chamber 32, a flexible diaphragm 34 forming a wall of the fuel chamber, a fuel inlet 72 for admitting fuel from a supply into the fuel chamber 32, valve means 76, 77 associated with the fuel inlet, means actuated by movement of the diaphragm 34 for controlling the valve means 76, 77, a fuel discharge orifice 42 opening into the mixing passage for delivering fuel from chamber 32 into the mixing passage 12, a fuel passage between orifice 42 and chamber 32, a fuel metering means 90 movable to vary the fuel flow through the passage, and an operative connection 104, 109 between the throttle valve 26 and the metering means 90 whereby the relative position of the metering means is controlled by movement of the throttle. A choke valve mounted on shaft 20 is provided in the air inlet 18. The flexible diaphragm 34, through a lever 56 biased by spring 81, controls an inlet valve member 64 having a valve portion 77 co-operating with a seat 76 for regulating the fuel flow into the chamber. The throttle shaft is formed with a cam surface 106 which cooperates with a rod 104 to move a member 109 which controls the position of metering means 90 slidable in bore 82. Fuel flows from chamber 32 through duct 83, into bore 82, and is metered by the needle part 94 into bore 84 wherefrom it travels to the outlet 42 by means of passages 80, and 44. An air bleed may be provided from bore 82 to the air inlet 18. On opening the throttle a sub-atmospheric pressure is formed in the mixing passage 12 and the diaphragm 34 moves upwards due to atmospheric pressure acting, through aperture 39 in cover 38, on the lower side, thus allowing fuel to enter from inlet 72. Fuel flows from the chamber past the metering means opened by the throttle to the outlet 42 and into the mixing passage. In another embodiment, Figs. 6 and 8, the fuel flows from fuel chamber 321 via a duct into bore 138, and is metered by needle 132 into well 139, via passage 152. An idling orifice 146 and a slow running orifice 148 are provided at the side of throttle valve 261 which is connected as described above to metering means 128. When the orifices 146, 148 are in use, air passing through the main orifice 140 as well as the air bleed 156 from the air inlet to bore 138, mixes with the fuel. A modification of this embodiment is described wherein an auxiliary metering device independent of the throttle acts on fuel passing direct from the fuel chamber to the idling and slow speed orifices. In another embodiment, Fig. 17, a barrel-type throttle means 256 is associated with the needle 268 for metering the fuel from chamber 218 to the outlet 276. An air bleed is provided by passage 308 with restriction 310. The throttle 256, spring- loaded in bore 254, is controlled by cable 260 attached to the throttle. Adjustment of the metering means relative to the throttle 256 is provided by grooves in the member 266 which engage disc 274. Specifications 833,036 and 854,216 are referred to.
GB41232/59A 1958-12-16 1959-12-04 Improvements in or relating to diaphragm carburettors Expired GB874357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US780845A US3003754A (en) 1958-12-16 1958-12-16 Charge forming apparatus

Publications (1)

Publication Number Publication Date
GB874357A true GB874357A (en) 1961-08-02

Family

ID=25120880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41232/59A Expired GB874357A (en) 1958-12-16 1959-12-04 Improvements in or relating to diaphragm carburettors

Country Status (2)

Country Link
US (1) US3003754A (en)
GB (1) GB874357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067042A2 (en) * 1981-06-04 1982-12-15 Benjamin Lynn Ellison Carburetor

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1526708B1 (en) * 1965-02-08 1971-01-28 Mcgulloch Corp Diaphragm carburetor for internal combustion engines
US3367637A (en) * 1965-02-08 1968-02-06 Mcculloch Corp Carburetor
US3743254A (en) * 1970-12-10 1973-07-03 Walbro Corp Diaphragm carburetor
US3779529A (en) * 1971-08-26 1973-12-18 Mikuni Kogyo Kk Differential diaphragm carburetor
US3933949A (en) * 1974-05-03 1976-01-20 Borg-Warner Corporation Charge forming apparatus
US4539163A (en) * 1982-07-13 1985-09-03 Sanshin Kogyo Kabushiki Kaisha Carburetor
US4648998A (en) * 1985-03-11 1987-03-10 Shingawa Daikasuto Kogyo Kabushiki Kaisha Charge forming apparatus
US5411680A (en) * 1992-11-16 1995-05-02 Tillotson, Ltd. Carburetor
US5250233A (en) * 1992-11-23 1993-10-05 Walbro Corporation Carburetor with accelerator and idle circuit shut-off
JP2017115734A (en) * 2015-12-25 2017-06-29 本田技研工業株式会社 Carbureter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297736A (en) * 1941-07-11 1942-10-06 Aymar Anthony Carburetor
US2808245A (en) * 1950-11-20 1957-10-01 Anna M Grover Fuel feed devices for internal combustion engines
US2733902A (en) * 1955-05-27 1956-02-07 phillips

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067042A2 (en) * 1981-06-04 1982-12-15 Benjamin Lynn Ellison Carburetor
EP0067042A3 (en) * 1981-06-04 1983-04-20 Benjamin Lynn Ellison Fluid mixing device - carburetor

Also Published As

Publication number Publication date
US3003754A (en) 1961-10-10

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