Pulse width control circuit in which a feedback amount is varied

Details Pulse width control circuit in which a feedback amount is varied Pulse width control circuit in which a feedback amount is varied

1982-06-14

1984-09-04

Dolinar, Andrew M.

Internal-combustion engines

High tension ignition system

Having dwell control

123625, 123644, 307265, 307310, 307359, F02P 900

Patent

active

044690827

ABSTRACT:
An ignition coil control circuit compares the coil input current with a reference level, and the duty ratio of the output current is altered accordingly. The reference level is raised during cold weather operations, raising the duty ratio. Once the operating temperature of the engine rises above a predetermined level, a detector circuit activates a control signal generator which lowers the reference level received by the comparator to lower the duty ratio accordingly.

REFERENCES:
patent: 3314407 (1967-04-01), Schneider
patent: 3605713 (1971-09-01), Le Masters et al.
patent: 3841288 (1974-10-01), Korteling
patent: 4059083 (1977-11-01), Habert
patent: 4167927 (1979-09-01), Mikami et al.
patent: 4267813 (1981-05-01), Hohne et al.
patent: 4350904 (1982-09-01), Cordell

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