GB1422955A - Carburetters for internal combustion engines - Google Patents
Carburetters for internal combustion enginesInfo
- Publication number
- GB1422955A GB1422955A GB5091272A GB5091272A GB1422955A GB 1422955 A GB1422955 A GB 1422955A GB 5091272 A GB5091272 A GB 5091272A GB 5091272 A GB5091272 A GB 5091272A GB 1422955 A GB1422955 A GB 1422955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- duct
- valve
- chamber
- vapour
- air
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
-
- 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
- F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
- F02M7/11—Altering float-chamber 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
- F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
- F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
- F02M7/14—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle
- F02M7/16—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis
- F02M7/17—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis by a pneumatically adjustable piston-like element, e.g. constant depression carburettors
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)
Abstract
1422955 Spray carburetters BRITISH LEYLAND UK Ltd 1 Nov 1973 [4 Nov 1972] 50912/72 Heading F1B Constant depression carburetter includes a vapour duct 4 connected to the float chamber air space, an outlet duct C connected to the constant depression region of the carburetter, and air duct D connected to a supply of air, each of the above ducts being connected to a flow control means F which includes a flow regulator to simultaneously regulate flows along the vapour and air ducts 4 and D to the outlet duct C so that the ratio of flows into duct C is maintained constant regardless of flow-rate, and a pressure sensitive element in communication with the vapour duct to adjust the flow regulator to increase flow along the vapour and air ducts with increasing pressure in the vapour duct and vice versa. The flow control means comprises housing 3 divided by diaphragm 1 into chamber 2 which is open to vapour duct 4 and chamber 17 which is open to air duct D. A second diaphragm 14 defines a third chamber 15 which communicates with chamber 17 through the bore of a tube 16 and port 20. The upper end of tube 16 is formed as a valve seating for diaphragm 1. Valve member 18a co-operates with seat 19 in tube 16 and has a stem 18 which engages diaphragm 1. Pivotally mounted on the housing is a plate valve 10 which co-operates with a valve seat 8 and a second valve seat 9. The circumference of valve seat 9 is five times that of valve seat 8, and the lift of the plate 10 on seat 9 is five times the lift on seat 8, so that the effective valve openings are in the ratio 25:1 Vapour pressure in conduit 4 moves diaphragm 1 and displaces valve member 18a and allows vapour past valve seat 8 and air past valve seat 9 to form a 12¢:1 mixture in chamber 13. As the vapour pressure in duct 4 decreases, diaphragm I rises, and atmospheric air passes seating 22 and enters chamber 15. An auxiliary valve 100 vents duct 4 to duct D when the engine is stopped. Spring 24 biases diaphragm 23 to open valve 100. To compensate for changes in atmospheric density a series orifice arrangement is provided, Fig. 4, in which duct 29 is connected to chamber 17, orifice 27 leads to duct C and the upper part of the device is connected to atmosphere and to duct D, chamber 17 being isolated from duct D. An aneroid capsule 30 controls the position of a valve 31 which determines the effective size of the orifice 26. The capsule may contain a dry inert gas so that it is responsive to a change in air temperature as well as pressure. The series orifice arrangement can result in cancellation of the enrichment for acceleration normally provided by the hydraulic piston damper, in a modification this effect is avoided by a further valve which admits atmospheric pressure to the float chamber, Fig. 5 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5091272A GB1422955A (en) | 1972-11-04 | 1972-11-04 | Carburetters for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5091272A GB1422955A (en) | 1972-11-04 | 1972-11-04 | Carburetters for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1422955A true GB1422955A (en) | 1976-01-28 |
Family
ID=10457880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5091272A Expired GB1422955A (en) | 1972-11-04 | 1972-11-04 | Carburetters for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1422955A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2719749A1 (en) * | 1976-12-29 | 1978-07-06 | Aisan Ind | VENTURI CARBURETOR FOR A COMBUSTION ENGINE |
FR2481371A1 (en) * | 1980-04-25 | 1981-10-30 | Borg Warner | HOT RESET VALVE FOR MEMBRANE CARBURETOR |
US5021198A (en) * | 1990-01-16 | 1991-06-04 | Bombardier Inc. | Carburetor with high altitude compensator |
-
1972
- 1972-11-04 GB GB5091272A patent/GB1422955A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2719749A1 (en) * | 1976-12-29 | 1978-07-06 | Aisan Ind | VENTURI CARBURETOR FOR A COMBUSTION ENGINE |
FR2481371A1 (en) * | 1980-04-25 | 1981-10-30 | Borg Warner | HOT RESET VALVE FOR MEMBRANE CARBURETOR |
US5021198A (en) * | 1990-01-16 | 1991-06-04 | Bombardier Inc. | Carburetor with high altitude compensator |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Free format text: FOR 1429955 READ 1422955 IN JOURNAL 4976 PAGE 2300 |