System to control the on-off time of a pulse train of variable f

Details System to control the on-off time of a pulse train of variable f System to control the on-off time of a pulse train of variable f

1978-03-20

1980-04-22

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117D, 123148E, 235 92TF, F02P 504, F02P 100, G06F 7385

Patent

active

041989368

ABSTRACT:
A pulse train of a first frequency is generated, for example representative of speed of an internal combustion engine, and counted in a counter in a first counting cycle until the counter reaches a predetermined count number, the counter then being reset; a second frequency signal, for example a multiplied frequency derived from the first is then applied to the counter during a second count cycle, the counter stopping to count when current flow through the ignition coil of a predetermined level is sensed, and establishing a count number from which the counter can start counting at the next subsequent first cycle. The ON time of ignition current flow is controlled to commence at the beginning of the second count cycle, terminating at the ignition instant, as controlled by an ignition time control arrangement.

REFERENCES:
patent: 3892219 (1975-07-01), Preiser et al.
patent: 3908616 (1975-09-01), Sasayama
patent: 4018202 (1977-04-01), Gartner
patent: 4041912 (1977-08-01), Sessions
patent: 4083347 (1978-04-01), Grather et al.
patent: 4095165 (1978-06-01), Boros
patent: 4099507 (1978-07-01), Pagel et al.
patent: 4106447 (1978-08-01), West

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