EP 0051992 A3 19821201 - A CARBURETTOR AND A METHOD OF CARBURATION
Title (en)
A CARBURETTOR AND A METHOD OF CARBURATION
Publication
Application
Priority
- ZA 806891 A 19801107
- ZA 81702 A 19810202
- ZA 813072 A 19810508
- ZA 816155 A 19810904
Abstract (en)
[origin: EP0051992A2] The invention provides a carburettor for an internal combustion engine, comprising an upper plate element, a lower plate element and a side wall structure which spaces the plate elements from one another to define a mixing chamber within its surround. A tangential inlet to the chamber is defined in the side wall structure while a central outlet from the chamber is provided so that fluid entering the inlet follows a vortical path en route to the outlet. In a preferred arrangement the inlet is provided with a variable throat which includes a hinged flap adapted automatically to open the throat in proportion to air flow therethrough so that velocity through the throat remains substantially constant until the flap is fully open. A fuel jet is disposed a short distance downstream from the free end of the flap so that with the flap partially open, the jet is subjected to a constant pressure differential and in order to compensate for increasing airflow, a number of jets are provided successively upstream from the first jet. Once the flap is fully open, increased air flow results in an increased pressure differential over the jets so that the air fuel ratio remains substantially constant. A feature of the invention is that during low engine speeds, for example, during starting and idling, the air velocity is sufficiently high to effect vaporisation of liquid fuel.While the carburettor is of extremely simple construction, the mixing chamber ensures a high degree of vaporisation of liquid fuel without the application of heat or dependancy upon a manifold for the internal combustion engine.
IPC 1-7
IPC 8 full level
F02M 9/10 (2006.01); F02M 11/02 (2006.01); F02M 13/04 (2006.01); F02M 29/06 (2006.01)
CPC (source: EP)
F02M 9/106 (2013.01); F02M 11/02 (2013.01); F02M 13/046 (2013.01); F02M 29/06 (2013.01)
Citation (search report)
- [Y] US 4063905 A 19771220 - JOHNSON ROY HENRY, et al
- [Y] US 4149562 A 19790417 - JOHNSON ROY H, et al
- [YD] EP 0011360 A1 19800528 - AUTOMOTIVE ENG ASS [US]
- [Y] US 4072139 A 19780207 - MIYAZAWA KUNIAKI
- [A] US 3395899 A 19680806 - KOPA RICHARD D
- [AD] US 3336017 A 19670815 - KOPA RICHARD D
- [AD] GB 413630 A 19340719 - ROBERT WATCHORN
Designated contracting state (EPC)
BE DE FR GB IT SE
DOCDB simple family (publication)
EP 0051992 A2 19820519; EP 0051992 A3 19821201; AR 226135 A1 19820531; AU 7690281 A 19820513; BR 8107219 A 19820727; ES 506912 A1 19820816
DOCDB simple family (application)
EP 81305276 A 19811106; AR 28735781 A 19811105; AU 7690281 A 19811028; BR 8107219 A 19811106; ES 506912 A 19811106