Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1976-02-27
1978-05-02
Cox, Ronald B.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
180105E, 307 96, 361236, F02P 900
Patent
active
040868885
ABSTRACT:
An electronic vacuum modulator is disclosed for controlling air flow to a throttle valve modulator mechanism for limiting the maximum speed of an engine and, optionally, for also limiting the maximum vehicle speed. An electric signal having a frequency proportional to engine speed is converted into an electric signal which smoothly and progressively controls a solenoid valve as the engine speed increases over a narrow range at a predetermined maximum engine speed. The valve is controlled such that the modulator mechanism progressively closes a carburetor throttle valve in the engine to limit the engine speed by limiting the available power. Optionally, a vehicle speed signal also is converted into an electronic signal which smoothly and progressively controls the solenoid valve as the vehicle speed increases over a narrow range at a predetermined maximum vehicle speed.
REFERENCES:
patent: 3332406 (1967-07-01), Perry et al.
patent: 3560854 (1971-02-01), Moss et al.
patent: 3700996 (1972-10-01), Gutting
patent: 3789810 (1974-02-01), Satter
patent: 3811418 (1974-05-01), Sakakibara
Cox Ronald B.
Eltra Corporation
Johnson Robert H.
Todd, Jr. Oliver E.
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