Quiescent current disconnect system and apparatus for ignition c

Details Quiescent current disconnect system and apparatus for ignition c Quiescent current disconnect system and apparatus for ignition c

1976-08-30

1978-05-09

Myhre, Charles J.

Internal-combustion engines

Igniters

Sparkers

123148E, 123117D, F02P 900

Patent

active

040881067

ABSTRACT:
A speed related signal is counted out with respect to clock pulses having a predetermined rate in a counter; if, and when the counter reaches a certain predetermined number, the number is decoded and applied as a disconnect control signal to open a switch controlling current flow through the ignition coil. The number is selected to occur only if the engine operates at a very slow speed, or is stopped, so that no reset signal will be applied to the counter. A logic stage is provided having both the output of the count decoder stage as well as of the speed related signal applied thereto to ensure that disconnection is effected only when the counter has reached the decoding number, and then to continue reliably disconnection of the ignition current.

REFERENCES:
patent: 3745985 (1973-07-01), Hohne
patent: 3874355 (1975-04-01), Suda et al.
patent: 3921610 (1975-11-01), Hartig
patent: 3927648 (1975-12-01), Kawai et al.
patent: 3942491 (1976-03-01), Seite et al.
patent: 4018197 (1977-04-01), Salway
patent: 4018202 (1977-04-01), Gartner

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