Speed-dependent ignition timing system for internal combustion e

Details Speed-dependent ignition timing system for internal combustion e Speed-dependent ignition timing system for internal combustion e

1978-11-28

1980-12-09

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123610, F02P 304, F02P 504

Patent

active

042378354

ABSTRACT:
A speed discriminator circuit furnishes an upper speed range signal if the engine speed is above a preselected speed. When the engine speed is above the preselected speed, the electronic switch controlling the current flow through the primary winding of the ignition coil is switched to the conductive state at a time when a control signal which varies as a function of actual engine speed becomes less than a speed varying reference signal. The switch is opened, thereby creating the first spark, either when the control signal, which is an AC signal, passes through zero or when the current in the primary winding of the coil has reached a predetermined value indicating that sufficient energy for ignition has been stored in the ignition coil. When the speed is less than the preselected speed the electronic switch is closed when the AC control signal passes through zero and is reopened when the current through the primary winding of the ignition coil is indicative of sufficient stored energy for ignition. A circuit for creating a series of additional sparks following the first spark is also disclosed.

REFERENCES:
patent: 3882835 (1975-05-01), Randriamanentena
patent: 3990417 (1976-11-01), Tershak
patent: 4043302 (1977-08-01), Sessions
patent: 4044733 (1977-08-01), Suda
patent: 4059083 (1977-11-01), Habert
patent: 4167927 (1979-09-01), Mikami et al.
patent: 4176645 (1979-12-01), Jundt et al.

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