초록 ▼

An adaptor flange for fitting under the mounting flange of a carburetor of an internal combustion engine and formed with a venturi type flow passage having perforated induction tube spanning thereacross for sensing the magnitude of the partial vacuum in such passage. A controller housing is connecte

An adaptor flange for fitting under the mounting flange of a carburetor of an internal combustion engine and formed with a venturi type flow passage having perforated induction tube spanning thereacross for sensing the magnitude of the partial vacuum in such passage. A controller housing is connected on one end with an air filter and is formed with an induction throat leading to a control chamber. Disposed in the induction throat is a nozzle which is, in turn, connected with the carburetor float chamber. Mounted in the control chamber are first and second pressure responsive valves. Such valves are connected through air/fuel vapor lines to the induction tubes and are responsive to predetermined engine conditions, as sensed in said flow passage, to cooperate therewith in selectively varying the flow rate through said induction throat to correspondingly vary the mixture to the intake manifold.

대표청구항 ▼

Carburetor air/fuel vapor control apparatus for controlling flow of air and fuel vapor from an air and vapor supply to the intake manifold of an engine and comprising: an adaptor configured to be mounted under the mounting flange of the carburetor, said adaptor being formed with a flow passage and i

Carburetor air/fuel vapor control apparatus for controlling flow of air and fuel vapor from an air and vapor supply to the intake manifold of an engine and comprising: an adaptor configured to be mounted under the mounting flange of the carburetor, said adaptor being formed with a flow passage and including an air and fuel vapor inlet port means and a perforated injection tube leading from said port and disposed in spanning relationship across said passage; and a controller including an air inlet passage formed with a reduced cross section induction passage, an air and fuel vapor inlet port for connection with said air and fuel vapor supply, vacuum port means for connection with said inlet port to said adaptor, said controller further including first and second control passages leading from said induction passage to said vacuum port means, first and second control valves for controlling flow in said first and second control passages, first and second control means for controlling said first and second valves, said first control means being operative in response to a predetermined partial vacuum at said vacuum port means to open said first valve to communicate flow of air and fuel vapor from said induction passage through said first control passage to said flow passage, said second control means being responsive to a selected partial vacuum at said vacuum port means, lower than said predetermined vacuum, to open said second valve to communicate flow of air and fuel vapor from said induction passage through said second control passage to said flow passage to combine with the flow through said first control passage whereby said controller will respond to said partial vacuum to open said first valve when said engine is decelerating and to open said second valve when said engine is subjected to high acceleration or cruising under a load.