Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-02-07
1978-10-24
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123 32EC, 123 32EB, F02P 508, F02B 310
Patent
active
041215532
ABSTRACT:
An electric ignition advance system for internal combustion engines wherein an ignition timing to be advanced in accordance with a scheduled pattern is determined digitally. Advance pattern voltage generators generate voltage signals depending on engine operation parameters such as engine rotational speed or engine intake vacuum and hence the voltage signals represent scheduled advance pattern voltages. The voltage signal, i.e., the advance pattern voltages are combined and the resultant signal is converted into a frequency signal. The frequency signal is counted by a digital ignition timing determination circuit with respect to a reference ignition signal supplied from, e.g. a distributor. When the digital ignition timing determination circuit counts a predetermined number of the frequency signals, it provides an ignition signal.
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patent: 3908616 (1975-09-01), Sasayama
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patent: 3927648 (1975-12-01), Kawai et al.
patent: 4051822 (1977-10-01), Yoshida
Lall P. S.
Myhre Charles J.
Nippondenso Co. Ltd.
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