Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1974-07-24
1976-03-30
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
180105E, F02D 1110, B60K 2700
Patent
active
039467074
ABSTRACT:
Disclosed is an electronic vehicle speed control with a fluid actuating means. Typically the actuating force is derived from the vehicle engine manifold vacuum applied selectively to a bellows operatively connected to the throttle mechanism. A dead-band type control is provided. When the actual vehicle speed is below the dead band range a valve is operated to allow the control fluid to increase the throttle setting. When the vehicle speed is above the dead band range a valve is operated to allow the control fluid to decrease the vehicle setting. In the preferred and specifically described circuit a circuit is provided to translate a contact closure rate into a D. C. voltage proportional to vehicle speed. A constant current source drives a series circuit including a speed set potentiometer and a dead-band setting resistor. The set speeds at either end of the dead band are compared to the actual speed and vacuum is "admitted" to or "dumped" from the bellows to return the actual speed within the dead band. Such a system provides very satisfactory control while affecting engine operation much less than a conventional vacuum powered vehicle speed control. Several novel safety and operational sub-circuits are also provided.
REFERENCES:
patent: 3556245 (1971-01-01), Radin
patent: 3575256 (1971-04-01), Jania
patent: 3645241 (1972-02-01), Huntzinger
patent: 3667020 (1972-05-01), Senzaki
patent: 3682145 (1972-08-01), Ohtani
patent: 3766895 (1973-10-01), Voss
Cox Ronald B.
Dana Corporation
Myhre Charles J.
Pollock Robert E.
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