Choke control system for internal combustion engine

Details Choke control system for internal combustion engine Choke control system for internal combustion engine

1975-08-14

1977-05-31

Husar, C. J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 75B, 123127, 123DIG4, 261 23A, 261 39B, F02M 2506

Patent

active

040262804

ABSTRACT:
A first choke valve is mounted in a main intake passage carrying a lean mixture to a main combustion chamber, and a second choke valve is mounted in an auxiliary intake passage carrying a rich mixture to a relatively small auxiliary chamber. Spark ignition of the mixture in the auxiliary combustion chamber projects a flame through a torch nozzle connecting the chambers to ignite the lean mixture in the main combustion chamber. Control of the main choke valve for moderately cold starting or extremely cold starting is accomplished automatically by means of a control element driven by a heat responsive bimetal element, or by means of a manually operated control element. In either case, overtravel of the control element after the main choke valve closes stores energy in a spring to increase closing torque of the main choke valve, and also moves the auxiliary choke valve toward closed position, to improve engine startability under extremely cold conditions. Both choke valves open in response to complete firing of the engine.

REFERENCES:
patent: 3659564 (1972-05-01), Suzuki et al.
patent: 3785624 (1974-01-01), Marsel
patent: 3817223 (1974-06-01), Doss
patent: 3830206 (1974-08-01), Asaka et al.
patent: 3837322 (1974-09-01), Shishido
patent: 3842810 (1974-10-01), Yagi et al.
patent: 3967600 (1976-07-01), Iiyama

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