Carburetor choke valve control system apparatus

Details Carburetor choke valve control system apparatus Carburetor choke valve control system apparatus

1975-11-03

1977-11-29

Lazarus, Ronald H.

Internal-combustion engines

Two-cycle

Rear compression

123119F, 123127, 123DIG4, 261 23A, F02B 7502, F02D 3902

Patent

active

040600629

ABSTRACT:
A carburetor having a main intake passage for a lean mixture and an auxiliary intake passage for a rich mixture is provided with a choke valve in each passage. A control mechanism for operating the two choke valves includes a lost-motion connection so that the main choke valve is at the first to be moved toward closed position, for cold starting of the engine. For colder temperatures, both choke valves are moved toward closed position, and for very cold starting conditions, both choke valves are moved to fully closed position. The control mechanism may be manually operated or it may be automatic under the control of a bimetal element. When the engine on being started reaches a state of complete firing, with stable RPM, both choke valves are opened to predetermined pull-down angles.

REFERENCES:
patent: 3443552 (1969-05-01), Von Seggern
patent: 3659564 (1972-05-01), Suzuki
patent: 3785624 (1974-01-01), Marsee
patent: 3837322 (1974-09-01), Shishido
patent: 3882831 (1975-05-01), Date
patent: 3941105 (1976-03-01), Yagi
patent: 3967600 (1976-07-01), Iiyama
patent: 3982507 (1976-09-01), Asaka

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