Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-06-27
1979-02-20
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123117R, 123148E, F02P 504, F02P 108
Patent
active
041400925
ABSTRACT:
An electronic system which limits exhaust emissions from an automobile engine by selectively retarding the point of firing the spark plugs at selected speeds during acceleration and at different speeds during deceleration; said system including a capacitive discharge ignition system which is responsive to an electronic system which will retard the point of firing the spark plugs a predetermined amount dependent upon the speed of the vehicle as above or below a predetermined speed. Said system also including an improved low cost tachometer for feeding to the system an analog output dependent upon the engine speed, which analog output is fed to a low rpm control level detector and a high rpm control level detector, and the outputs of said detectors are fed to a control logic which is connected to the vacuum advance of the engine to selectively disconnect the vacuum advance of the engine at certain speeds. Said electronic circuitry being connected such that the vacuum advance is disconnected and then reconnected at different speeds when the vehicle is operating in an acceleration mode than when the vehicle is operating in a deceleration mode.
REFERENCES:
patent: 3272191 (1966-09-01), Walker
patent: 3314407 (1967-04-01), Schneider
patent: 3317260 (1970-06-01), Oishi
patent: 3357114 (1967-12-01), Green
patent: 3581720 (1971-06-01), Hemphill
patent: 3592178 (1971-07-01), Schiff
patent: 3603298 (1971-09-01), Toda
patent: 3654910 (1972-04-01), Kuehn
patent: 3660689 (1972-05-01), Oishi et al.
patent: 3687120 (1972-09-01), Lenz
patent: 3735743 (1973-05-01), Shimizu
Popular Electronics, Nov. 66, pp. 53-56, 101.
The Design, Development & Application of Exhaust Emission Control Devices; DeForge Fedman.
Lanning William C.
Swanson Caleb V.
Air Quality Products, Inc.
Lall P. S.
Myhre Charles J.
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