GB912927A - Charge forming apparatus - Google Patents
Charge forming apparatusInfo
- Publication number
- GB912927A GB912927A GB3407/61A GB340761A GB912927A GB 912927 A GB912927 A GB 912927A GB 3407/61 A GB3407/61 A GB 3407/61A GB 340761 A GB340761 A GB 340761A GB 912927 A GB912927 A GB 912927A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- chamber
- passage
- valve
- diaphragm
- 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
Links
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
- F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
- F02M17/02—Floatless carburettors
- F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/68—Diaphragm-controlled inlet valve
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
912,927. Charge forming apparatus. TILLOTSON MANUFACTURING CO. Jan. 30, 1961 [Aug. 23, 1960], No. 3407/61. Class 7(3) [Also in Group XXIX] Charge forming apparatus includes a body formed with a mixing passage, an unvented fuel chamber formed in the body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet for the fuel chamber, a valve member for the fuel inlet, means establishing operative connection between the valve member and the diaphragm for controlling the position of the valve member for regulating fuel flow from a supply into the fuel chamber, the body being formed with a bore opening into the mixing passage, a fitting pressed into the bore, the fitting having a fuel passage formed therein opening into the mixing passage, a secondary fuel delivery orifice formed in the body opening into the mixing passage and duct means formed in the body for conveying fuel from the fuel chamber to the secondary orifice. Referring to Figs. 1 to 10 the body member 10 is formed with a mixing passage 12 which includes an air inlet region 14 a Venturi 16 and a mixture outlet region 20. The space or chamber 58 is vented to atmosphere through an opening 60 (Fig. 2). The reinforcing member 62 may be of sheet metal or moulded resin. The diaphragm 48 is arranged to regulate the flow of liquid fuel from a supply into the chamber 46. A flexible fuel supply hose or tube (not shown) is connected to the inlet 70. The valve 80 regulates or controls fuel flow into the chamber 46. The fuel chamber 46 is unvented and the diaphragm is flexed solely by asperation or reduced pressure in the mixing chamber 12 set up by air flow through the mixing passage. Comparatively low velocity of air in the mixing passage initiates delivery of fuel through the nozzle 102. The carburetter includes a main nozzle or orifice for high speed operation which is fabricated as a removable unit 102 and a secondary fuel delivery system including engine idling and low speed orifices 106 and 108 respectively. The fuel conveying channels and fuel regulating or metering means for the main orifice and secondary orifice system are illustrated in Figs. 6 and 7. The check valve and main nozzle unit construction 102 is illustrated in Figs. 8 and 9. The main nozzle unit construction 102 is pressed into a bore in the body 10. The valve 112 is a high speed fuel metering valve. The passage 114 is in communication with the recess 98 formed in a wall of the fuel chamber 46 and facilitates fuel flow from the fuel chamber 46 to the main orifice and to the secondary fuel delivery orifices. A passage 116 conveys fuel to the main nozzle 102 and to the secondary orifices 106 and 108. Arranged in parallelism with the passage 116 is a passage or duct 122, the passage 122 being in communication with the chamber 104 of the secondary fuel delivery system through a restricted passage 124. The valve 136 meters or regulates fuel flow to the secondary orifices. The carburetter is operable in various angular positions as well as inverted positions, these conditions being encountered where the carburetter is used with engines powering chain saws. The check valve 156 is preferably fashioned of lightweight material such as nylon or polyoxymethylene resin. In a modification the chamber below the diaphragm is vented to the air inlet region of the mixing passage. In another modification a diaphragm pump is mounted on the carburetter. The pump may be of the character illustrated in Specification 854,216. Modified forms of the main nozzle are shown in Figs. 17 and 18. The valve member 236 may be made of polyoxymethylene phenolformaldehyde resin, polyester resin, polytrifluorochloroethylene or polyamide resin. The carburetter may be used with two stroke cycle and four stroke cycle engines.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51413A US3085791A (en) | 1960-08-23 | 1960-08-23 | Charge forming apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB912927A true GB912927A (en) | 1962-12-12 |
Family
ID=21971157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3407/61A Expired GB912927A (en) | 1960-08-23 | 1961-01-30 | Charge forming apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US3085791A (en) |
GB (1) | GB912927A (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3181843A (en) * | 1962-12-17 | 1965-05-04 | Acf Ind Inc | Carburetor |
US3272143A (en) * | 1963-05-20 | 1966-09-13 | Ohlsson & Rice Inc | Demand fuel regulator and priming pump |
US3367637A (en) * | 1965-02-08 | 1968-02-06 | Mcculloch Corp | Carburetor |
US3269713A (en) * | 1965-02-15 | 1966-08-30 | Mcculloch Corp | Carburetor having an idle governor |
US3241822A (en) * | 1965-03-08 | 1966-03-22 | Acf Ind Inc | Carburetor and fuel nozzle therefor |
US3275305A (en) * | 1965-05-03 | 1966-09-27 | Tillotson Mfg Co | Fuel feed and charge forming apparatus with priming device |
US3404872A (en) * | 1966-05-25 | 1968-10-08 | Tillotson Mfg Co | Charge forming apparatus |
US3454265A (en) * | 1967-01-13 | 1969-07-08 | Tillotson Mfg Co | Fuel feeding and charge forming apparatus |
US3633557A (en) * | 1970-01-30 | 1972-01-11 | Wallro Corp | Diaphragm carburetor |
US3759493A (en) * | 1972-07-20 | 1973-09-18 | Outboard Marine Corp | Fuel feed system |
US4931226A (en) * | 1989-03-01 | 1990-06-05 | Shinagawa Diecasting Co., Ltd. | Charge forming apparatus |
DE29722869U1 (en) * | 1997-12-24 | 1998-02-19 | Fa. Andreas Stihl, 71336 Waiblingen | Membrane carburetor for a portable, hand-held tool |
US6123322A (en) * | 1998-06-16 | 2000-09-26 | Walbro Corporation | Single screw carburetor |
US6439546B1 (en) * | 2000-08-29 | 2002-08-27 | Walbro Corporation | Carburetor with fuel vapor control |
DE102005019761B4 (en) * | 2005-04-28 | 2015-04-23 | Andreas Stihl Ag & Co. Kg | carburetor |
DE202007009475U1 (en) | 2007-07-05 | 2008-11-13 | Dolmar Gmbh | Arrangement of an air filter and a diaphragm carburetor |
AU2018267597B2 (en) | 2017-11-22 | 2019-10-24 | Tti (Macao Commercial Offshore) Limited | Carburetor having integrated filter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2823905A (en) * | 1954-12-13 | 1958-02-18 | Tillotson Mfg Co | Charge forming and fuel feeding apparatus |
US2733902A (en) * | 1955-05-27 | 1956-02-07 | phillips |
-
1960
- 1960-08-23 US US51413A patent/US3085791A/en not_active Expired - Lifetime
-
1961
- 1961-01-30 GB GB3407/61A patent/GB912927A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3085791A (en) | 1963-04-16 |
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