External pulse controlled spark advance unit for an internal com

Details External pulse controlled spark advance unit for an internal com External pulse controlled spark advance unit for an internal com

1980-02-01

1982-03-09

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123415, F02P 504

Patent

active

043183875

ABSTRACT:
A power unit (79) includes a spark advance unit (80) connected to a solid state ignition system (81) for selectively supplying ignition sparks to operate an internal combustion engine (83). A pulse generator (107) responds to a series of negative polarity half-cycle alternations (96) provided by an alternator winding (20') to provide a first pulse output (110) of a first frequency. A pulse counter (119) counts the pulses of the first pulse output (110) to provide a second pulse output (120) having a second frequency which is an exact fraction of the frequency of the first pulse output (110). A high speed and a low speed spark advance transfer unit each include a retriggerable monostable circuit (127, 136) coupled to a latch circuit (133, 142) to selectively operate a modifying circuit (145, 164) to provide control signals to the ignition system (81) to provide a rapid spark angle advance at preselected speeds.

REFERENCES:
patent: 3874349 (1975-04-01), Fitzner
patent: 3898972 (1975-08-01), Haubner
patent: 3923022 (1975-12-01), Scholl
patent: 4111174 (1980-09-01), Fitzner et al.
patent: 4208992 (1980-06-01), Polo
patent: 4244336 (1981-01-01), Fitzner

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