Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1974-04-10
1976-02-24
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123117D, F02P 504
Patent
active
039398110
ABSTRACT:
An ignition apparatus for supplying ignition energy of high voltage to the ignition plugs at the optimum ignition timing required of the internal combustion engine is disclosed, in which an electric or electronic adder in a control circuit begins to be energized after a time delay sufficient at least for completion of one ignition starting from the time of generation of at least one rotational angle signal occuring prior to the optimum ignition timing, the accumulating operation continues until the generation of the next rotational angle signal when a subtractor begins subtracting operation, and the next ignition is effected by causing electromagnetic induction in the ignition coils when the result of subtraction reaches a predetermined value. In the process, the length of the delay time, the accumulating and subtracting rate as relative to time and a reference value to be compared with the result of subtraction are maintained constant without regard to the engine rotational speed thereby to change the maximum amplitude at the time of change-over between addition and subtraction in accordance with the engine rotational speed, so that the time required for the result of subtraction to reach the predetermined reference is changed for regulation of ignition timing.
REFERENCES:
patent: 3454871 (1969-07-01), Nolting
patent: 3521611 (1970-07-01), Finch
patent: 3738339 (1973-06-01), Huntzinger et al.
patent: 3749073 (1974-07-01), Asplund
patent: 3757755 (1973-09-01), Carner
patent: 3791356 (1974-02-01), Saita
Burns Wendell E.
Cangelosi Joseph A.
Hitachi , Ltd.
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