Method and apparatus to generate a trigger pulse within a time r

Details Method and apparatus to generate a trigger pulse within a time r Method and apparatus to generate a trigger pulse within a time r

1978-01-16

1979-11-27

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123108E, 123117D, F02P 504

Patent

active

041755081

ABSTRACT:
To permit use of a simple transducer cooperating with a star-wheel, for example the starter gear or other gear on an internal combustion engine and having alternate magnetically responsive projections uniformly distributed around the circumference thereof, a counter is provided to count off a predetermined number of pulses derived from the transducer, the number of pulses being analyzed for their time duration to provide a single output pulse having a time duration corresponding to a predetermined number of teeth passing the transducer. A marker pulse derived from a separate marker element provides a reference. Signals representative of operating parameters of the engine are combined with the pulse having the length corresponding to the predetermined number of pulses, the resulting output being used to provide, upon comparison with a speed-responsive signal, an output, the time occurrence of which will cause triggering of the event, for example generation of a spark for an internal combustion engine.

REFERENCES:
patent: 3898894 (1975-08-01), Aono et al.
patent: 3916855 (1975-11-01), Fauser et al.
patent: 3919987 (1975-11-01), Haubner et al.
patent: 3923021 (1975-12-01), Stark
patent: 3923022 (1975-12-01), Scholl
patent: 3991730 (1976-11-01), Crall
patent: 4015566 (1977-04-01), Wahl
patent: 4083347 (1978-04-01), Grather et al.

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