Electronically controlled ignition for internal combustion engin

Details Electronically controlled ignition for internal combustion engin Electronically controlled ignition for internal combustion engin

1979-11-27

1982-04-13

Lall, P. S.

Internal-combustion engines

Charge forming device

Fuel injection system

123414, 123416, F02P 504

Patent

active

043242170

ABSTRACT:
An electronically controlled ignition system for internal combustion engines. Reference position detecting means generates reference signals and angular position detecting means generates angular signals indicative of the angular positions of an engine at every predetermined angle of its rotation. Computing means responsive to engine operating condition parameters computers a proper ignition coil energization starting timing data and a proper ignition coil de-energizing timing data. An ignition coil control circuit comprising latch circuits, comparator circuits and counting means converts the ignition coil energization starting timing data and the ignition coil de-energization timing data into pulses having a corresponding pulse width with respect to the rotational angle of the engine to supply an ignition coil energization starting timing signal and an ignition coil de-energizing timing signal to said ignition coil. The computations of the energization starting timing and de-energization timing are initiated in response to the reference signal and the energization starting timing signal, respectively, so that the energization starting timing data is computed by using the de-energization timing data computed in the preceding computation cycle and that the ignition coil control circuit is simplified in circuit construction.

REFERENCES:
patent: 3927648 (1975-12-01), Kawai et al.
patent: 4036190 (1977-07-01), Bigliani et al.
patent: 4081995 (1978-04-01), Griffith et al.
patent: 4162667 (1979-07-01), Kawai et al.
patent: 4167923 (1979-09-01), Iwase et al.
patent: 4168682 (1979-09-01), Gartner et al.
patent: 4175507 (1979-11-01), Kawai et al.

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