US3764120A - Air bleed adjusting device for the carburetor of an internal combustion engine - Google Patents

Air bleed adjusting device for the carburetor of an internal combustion engine Download PDF

Info

Publication number
US3764120A
US3764120A US00187602A US3764120DA US3764120A US 3764120 A US3764120 A US 3764120A US 00187602 A US00187602 A US 00187602A US 3764120D A US3764120D A US 3764120DA US 3764120 A US3764120 A US 3764120A
Authority
US
United States
Prior art keywords
air
engine
temperature
warming
valve
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
US00187602A
Other languages
English (en)
Inventor
Y Imai
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Application granted granted Critical
Publication of US3764120A publication Critical patent/US3764120A/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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/23—Fuel aerating devices
    • F02M7/24—Controlling flow of aerating air
    • F02M7/28—Controlling flow of aerating air dependent on temperature or pressure

Definitions

  • ABSTRACT retor of an internal combustion engine having a valve assembly settled between an air path to the air bleeding holes on a nozzle of the carburetor and the atmosphere, which has two ports in parallel with each other, just one of them has a cutoff valve to permit air to pass therethrough from the atmosphere to said air path at a temperature of the engine above a predetermined temperature during warming-up running of the engine, and the other has a variable orifice valve to permit air to pass therethrough from the atmosphere to said air path in association with said cutoff valveof the former as the temperature of the engine rises higher than said predetermined temperature during normal running of the engine after the warming-up running.
  • the purposexof the presentinvention is to provide an airbleed adjusting device for the carburetor of an internal combustion engine which supplies properly concentrated mixedgas inaccordance with variation-of the temperature-of the engine even during and after warming-up running -'of the engine, by adjusting the amount of air bledgfrom the air bleeding holes to the nozzle .of the carburetor.
  • an air bleed adjusting device for the carburetor of an internalcombustion'engine has a valve assembly settled between an air path to the air bleeding holes ona'nozzle of the carburetor and the atmosphere.
  • the valve assembly has two ports in parallel with each other.
  • One ofthem has a cutoff valve to permit air to'pass therethrough from the atmosphere to said airpath, andthe other has a variable orifice valve to permit :air to'passtherethrough from the atmosphere to'said air path.'But the variableorifice valve is to operate after operation of thecutoff valve as the temperature of the engine rises.
  • Thev piston 5 has a needle 6 elongated downwards therefrom so that the needle 6 can be inserted into the inside of a main nozzle 7 settled at the bottom portion of the variable Venturi pipe 2, and vary the cross sectional area at the outlet portion of the nozzle 7.
  • the inside of the main nozzle 7 is in conjunction with the float chamber 4 through a main jet pipe 8 settled at the lowermost portion of the main nozzle 7, which is usually positioned in fuel in the fuel pan of the float chamber 4. Moreover, the nozzle 7 is surrounded by an air bleeding chamber 10 which is in conjunction with the inside of the nozzle 7 through a number of air bleeding holes cut through the circumferential wall of the nozzle 7.
  • An air path 11 led into the chamber 10 is connected to a valve assembly V through a pipe 12.
  • the valve assembly V is settled on the outer surface of the intake pipe 13, which is relatively attached to the carburetor 1, of an internal combustion engine.
  • the valve assembly V has an air chamber 15 in connection with the atmosphere through an air cleaner 14 andan air passage 16 in connection with the air path 11. Between the air chamber 15 and the air passage 16,:two ports 17, 18 are formed.
  • the port 17 has a cutoff valve l9, while the port 18 has a variable orifice valve 20.
  • the cutoff valve 19 is formed with the valve body 22, which is mounted on the top portion of the bimetallic plate 21 attached to the proper portion of the inner wall of the chamber 15 at its root portion, in association with the port 17.
  • the variable orifice valve 20 is formed with the needle valve 24,-
  • another bimetallic plate 25 is also attached to the inner wall of the chamber 15 in parallel with the bimetallic plate 21, and the'free end of the plate 25 is in contact with the top of the needle valve 24.
  • the plate 21 curves downwards to separate the valve body 22 from the port 17 as the temperature of the engine rises (at a temperature above about 30 C), while the other plate 25 curves upwards to push up the'needle valve 24 asthe temperature of the engine. rises (at a temperature above about C).
  • a throttle 26 is fitted to have proper resistance against air flow passing therethrough.
  • the carburetor 1 has a choke valve27, a throttle valve 28 and a sub-nozzle 29 attached a sub-jet pipe thereto.
  • the bimetallic plate 21 begins to curve downwards to open the cutoff valve. 19 at temperature of the engine as about 30 C. Then, the cutoff valve 19 is fully opened at about 40 C to pass air therethrough from'the air chamber 15 to the port 17. After that, air goes into the air bleeding chamber .10 through the air passage 16, the pipe 12 and the air path 11, and is mixed with fuel injected with the main jet pipe S'to make mixture having proper concentration for warming-up running of the engine after starting operation, and then is supplied into the intake way 2.
  • the other bimetallic plate 25 begins to curve upwards to push up the needle valve 24 against the force of the spring 23 and open the variable orifice valve 20 at a temperature of the engine above about 60 C.
  • the variable orifice valve opens wider as the temperature of the enginerises, to permit air to pass through itself and the port 18 from the air chamber 15 to'the air passage 16. At this condition, so much air can pass through both the ports 17 and 18 from the air chamber 15 to the air passage 16, that the amount of bled air can be fully increased.
  • the amount of bled air is increased-as the temperature of the engine rises so as to supplement the decreased amount of air in the intake pipe of the engine at a high temperature, while properly concentrated mixed gas is supplied in accordance with rising of the temperature of the engine.
  • the character of an internal combustion engine is improved by adjusting the amount of bled air with a cutoff valve during warming-up running of the engine, and with both the cutoff valve and a variable orifice valve after the warming-up running, to constantly supply properly concentrated mixed gas into the interior of the intake way of the engine.
  • the present invention can be applied to the sub-nozzle instead of the main nozzle.
  • An air bleed adjusting device for a carburetor with nozzle of an internal combustion engine comprising, air path means to air bleeding holes on the nozzle of the carburetor; atmospheric path means open to the atmosphere; valve means between said air path means and said atmospheric path means, said valve meansv having two ports parallel to each other; engine temperature sensing means; a cut-off valve and a fixed orifice in one of said ports to permit air to pass therethrough from the atmosphere to said air path means when the engine temperature reaches the final temperature during the warming-up phase of the engine; a variable orifice valve in the other port to permit additional air to pass therethrough from the atmosphere to said air path means in proportion to increasing engine temperature over the operating temperature range, said operating temperature range being higher than the final temperature of the warming-up phase of the engine, whereby the density of the gas mixture is maintained at a substantially high level over lower temperature range compared to the final temperature of the warming-up phase, said density being held at a substantially low level over higher temperature compared to the final temperature of the warming-up phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US00187602A 1970-10-09 1971-10-08 Air bleed adjusting device for the carburetor of an internal combustion engine Expired - Lifetime US3764120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45088263A JPS4939087B1 (lv) 1970-10-09 1970-10-09

Publications (1)

Publication Number Publication Date
US3764120A true US3764120A (en) 1973-10-09

Family

ID=13937982

Family Applications (1)

Application Number Title Priority Date Filing Date
US00187602A Expired - Lifetime US3764120A (en) 1970-10-09 1971-10-08 Air bleed adjusting device for the carburetor of an internal combustion engine

Country Status (6)

Country Link
US (1) US3764120A (lv)
JP (1) JPS4939087B1 (lv)
AU (1) AU449876B2 (lv)
CA (1) CA944236A (lv)
FR (1) FR2111156A5 (lv)
SU (1) SU431684A3 (lv)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857908A (en) * 1973-02-09 1974-12-31 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3872189A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3872190A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3872188A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3899551A (en) * 1973-02-09 1975-08-12 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3925521A (en) * 1973-05-18 1975-12-09 Hitachi Ltd Variable Venturi type carburetor
US3963009A (en) * 1973-05-04 1976-06-15 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Carburation devices for internal combustion engines
US4071585A (en) * 1976-12-29 1978-01-31 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
US4084562A (en) * 1972-08-08 1978-04-18 Robert Bosch Gmbh Fuel metering device
US4110417A (en) * 1976-12-29 1978-08-29 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
US4117810A (en) * 1974-07-10 1978-10-03 Hoechst Aktiengesellschaft Process for device for preparing ignitable fuel mixtures
US4136139A (en) * 1976-12-16 1979-01-23 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
US4264536A (en) * 1978-10-19 1981-04-28 Honda Giken Kogyo Kabushiki Kaisha Adjusting device for starter-equipped carburetor
USRE30622E (en) * 1978-04-17 1981-05-26 Teledyne Industries, Inc. Fuel metering apparatus for a carburetor
US4276238A (en) * 1978-10-19 1981-06-30 Nissan Motor Company, Limited Carburetor with automatic choking and acceleration device
DE3142822A1 (de) * 1980-10-29 1982-06-24 Aisan Kogyo K.K., Obu, Aichi Regelbarer venturi-vergaser fuer motoren mit innerer verbrennung
US4341723A (en) * 1980-08-26 1982-07-27 Hidenori Hirosawa Variable venturi carburetor
US4394331A (en) * 1981-11-06 1983-07-19 Honda Giken Kogyo Kabushiki Kaisha Carburetor
US4460518A (en) * 1981-12-22 1984-07-17 Toyota Jidosha Kabushiki Kaisha Device for controlling the operation of a carburetor
US4472326A (en) * 1981-12-21 1984-09-18 Toyota Jidosha Kabushiki Kaisha Variable venturi-type carburetor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54126190U (lv) * 1978-01-19 1979-09-03
JPS5894908A (ja) * 1981-11-30 1983-06-06 Kawasaki Steel Corp ロ−リングカツトシヤ−の剪断荷重低減方法
FR3128390B1 (fr) 2021-10-21 2024-01-05 Psa Automobiles Sa Procédé et ensemble d’emboutissage comportant une pince rotative

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1809648A (en) * 1928-03-17 1931-06-09 Wheelerschebler Carburetor Co Carburetor
US1861725A (en) * 1926-10-19 1932-06-07 Curtis B Camp Automatic fuel regulator
US2245139A (en) * 1937-12-01 1941-06-10 Beck Ludwig Starting device for carburetors
US2981245A (en) * 1959-04-07 1961-04-25 Chrysler Corp Carburetor idle fuel control means
US2986380A (en) * 1957-12-30 1961-05-30 Acf Ind Inc Thermostatic idle
US3387830A (en) * 1966-12-30 1968-06-11 Ford Motor Co Carburetor air bleed

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342975A (en) * 1939-01-12 1944-02-29 Bendix Aviat Corp Carburetor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1861725A (en) * 1926-10-19 1932-06-07 Curtis B Camp Automatic fuel regulator
US1809648A (en) * 1928-03-17 1931-06-09 Wheelerschebler Carburetor Co Carburetor
US2245139A (en) * 1937-12-01 1941-06-10 Beck Ludwig Starting device for carburetors
US2986380A (en) * 1957-12-30 1961-05-30 Acf Ind Inc Thermostatic idle
US2981245A (en) * 1959-04-07 1961-04-25 Chrysler Corp Carburetor idle fuel control means
US3387830A (en) * 1966-12-30 1968-06-11 Ford Motor Co Carburetor air bleed

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084562A (en) * 1972-08-08 1978-04-18 Robert Bosch Gmbh Fuel metering device
US3872189A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3872190A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3872188A (en) * 1973-02-09 1975-03-18 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3899551A (en) * 1973-02-09 1975-08-12 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3857908A (en) * 1973-02-09 1974-12-31 Acf Ind Inc Apparatus for controlling and modulating engine functions
US3963009A (en) * 1973-05-04 1976-06-15 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Carburation devices for internal combustion engines
US3925521A (en) * 1973-05-18 1975-12-09 Hitachi Ltd Variable Venturi type carburetor
US4117810A (en) * 1974-07-10 1978-10-03 Hoechst Aktiengesellschaft Process for device for preparing ignitable fuel mixtures
US4136139A (en) * 1976-12-16 1979-01-23 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
US4110417A (en) * 1976-12-29 1978-08-29 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
US4071585A (en) * 1976-12-29 1978-01-31 Toyota Jidosha Kogyo Kabushiki Kaisha Variable venturi type carburetor
USRE30622E (en) * 1978-04-17 1981-05-26 Teledyne Industries, Inc. Fuel metering apparatus for a carburetor
US4264536A (en) * 1978-10-19 1981-04-28 Honda Giken Kogyo Kabushiki Kaisha Adjusting device for starter-equipped carburetor
US4276238A (en) * 1978-10-19 1981-06-30 Nissan Motor Company, Limited Carburetor with automatic choking and acceleration device
US4341723A (en) * 1980-08-26 1982-07-27 Hidenori Hirosawa Variable venturi carburetor
DE3142822A1 (de) * 1980-10-29 1982-06-24 Aisan Kogyo K.K., Obu, Aichi Regelbarer venturi-vergaser fuer motoren mit innerer verbrennung
US4394331A (en) * 1981-11-06 1983-07-19 Honda Giken Kogyo Kabushiki Kaisha Carburetor
US4472326A (en) * 1981-12-21 1984-09-18 Toyota Jidosha Kabushiki Kaisha Variable venturi-type carburetor
US4460518A (en) * 1981-12-22 1984-07-17 Toyota Jidosha Kabushiki Kaisha Device for controlling the operation of a carburetor

Also Published As

Publication number Publication date
SU431684A3 (lv) 1974-06-05
AU3436371A (en) 1973-04-12
CA944236A (en) 1974-03-26
AU449876B2 (en) 1974-06-27
JPS4939087B1 (lv) 1974-10-23
FR2111156A5 (lv) 1972-06-02

Similar Documents

Publication Publication Date Title
US3764120A (en) Air bleed adjusting device for the carburetor of an internal combustion engine
US3689036A (en) Air-fuel mixture enriching device for constant vacuum type carburetors
US2394663A (en) Carburetor device
US4369749A (en) Variable venturi carburetor
GB501651A (en) Improvements in carburetters for internal combustion engines
US3265050A (en) Carburetor construction
US3530842A (en) Vapor injector system
US2036205A (en) Carburetor
GB1537344A (en) Fuel supply means for internal combustion engine
US2208864A (en) Carburetor device
US3125084A (en) Fuel injection system
US3588058A (en) Power valve arrangement
US2676004A (en) Carburetor
US2346711A (en) Carburetor
US3280808A (en) Engine crankcase ventilating system
US2649290A (en) Carburetor
US1931259A (en) Carburetor
US4434110A (en) Carburetor, control apparatus and method for internal combustion engines
US3549133A (en) Carburetor
US2943849A (en) Carburetor attachment for motor vehicles
US2615695A (en) Carburetor
US2800121A (en) Fuel injection system for internal combustion engines
US2596429A (en) Automotive pressure carburetor
US2807449A (en) Carburetor construction
US4660525A (en) Carburetor mixture controller apparatus