Electronic ignition timing control system for internal combustio

Details Electronic ignition timing control system for internal combustio Electronic ignition timing control system for internal combustio

1977-10-17

1979-10-02

Lucas, Jay P.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, F02P 508, F02P 504

Patent

active

041694384

ABSTRACT:
Ignition timing control for an internal combustion engine is achieved by sensing engine rotation so as to generate output pulses for predetermined degrees of rotation and to develop a reset pulse at a rotational reference position. A first digital signal representing rotational speed of the engine and a second digital signal representing engine intake vacuum are converted into output date representative of optimum retard angles from the reference position. The output date are added to generate a plural bit binary signal having higher and lower significant bits. Comparison means, responsive to the reset pulse, counts the output pulses representing degrees of engine rotation and generates an output signal when the count reaches the value of the higher significant bits. Additional comparison means, responsive to the output signal from the first mentioned comparison means, counts multiplied output pulses representing degrees of engine rotation and generates an output signal representing optimum ignition time when the count reaches the value of the lower significant bits.

REFERENCES:
patent: 3888220 (1975-06-01), Bigalke
patent: 3996911 (1976-12-01), Canup
patent: 4018197 (1977-04-01), Salway
patent: 4036190 (1977-07-01), Bigliani
patent: 4052967 (1977-10-01), Colling
patent: 4068631 (1978-01-01), Lombard
patent: 4081995 (1978-04-01), Griffith
patent: 4086895 (1978-05-01), Habert

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