Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy
Patent
1981-12-18
1983-09-20
Lall, Parshotam S.
Internal-combustion engines
High tension ignition system
Using capacitive storage and discharge for spark energy
123418, 123618, 123648, 315219, F02P 508
Patent
active
044049528
ABSTRACT:
A magnet ignition device is provided with an angular position detecting device for producing a first angular signal with one polarity corresponding to an angular position of a given crankshaft of an engine and a second angular signal with the other polarity corresponding to an angular position of the crankshaft retarded by a given angle relative to the angular position where the first angular signal is generated. An ignition timing operation circuit is driven by the first angular signal. A signal representing advance angle information of the result of the operation by the operation circuit and the second angular signal are both applied to a switching element. In the circuit arrangement, only the second angular signal is used as an ignition signal in low rotational frequencies suffering from a great variation of the rotational frequency of the engine and, in high rotational frequencies higher than a given rotational frequency, only the advance angle signal is used as the ignition signal. With such an arrangement, an instability of the ignition timing due to a great variation of the rotational frequency in low rotational frequencies is prevented thereby to secure an accurate and stable ignition timing.
REFERENCES:
patent: 3890944 (1975-06-01), Werner et al.
patent: 3898972 (1975-08-01), Haubner
patent: 3901201 (1975-08-01), Mizuguchi et al.
patent: 4088106 (1978-05-01), Borst et al.
patent: 4099507 (1978-07-01), Pagel et al.
patent: 4175509 (1979-11-01), Orova et al.
patent: 4201163 (1980-05-01), Hattori et al.
patent: 4228778 (1980-10-01), Rabus et al.
Fujimoto Takanori
Tada Yasuo
Lall Parshotam S.
Mitsubishi Denki & Kabushiki Kaisha
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