Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-08-28
1977-02-22
Husar, C. J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123148E, F02P 100
Patent
active
040086984
ABSTRACT:
An improved ignition system uses feedback techniques to maintain a constant high energy ignition spark level over the normal range of engine RPM. The feedback automatically compensates for environmental and aging effects such as increased ignition coil resistance and decreased battery voltage.
A voltage controlled monostable multivibrator produces pulses determining the "on" time of an electronic switch which is in series with the coil. Current through the coil is sensed by a generator which feeds back an appropriate signal to control the monostable whereby a constant dwell time is maintained. At very high engine RPM a second feedback source servo-controls the system to a constant dwell angle condition. A constant dwell angle is also established at cranking speeds by a second pulse generator in parallel with the first.
REFERENCES:
patent: 3377998 (1968-04-01), Adams et al.
patent: 3575154 (1971-04-01), Taylor
patent: 3605713 (1971-04-01), LeMasters
patent: 3916855 (1975-11-01), Fauser et al.
patent: 3938490 (1976-02-01), Snyder et al.
Devinsky Paul
Gillman James W.
Husar C. J.
Lisa Donald J.
Motorola Inc.
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