Title: Photoelectric breakerless distributor

Abstract: There is provided an ignition system in which a light path is arranged so that the light output of a light emitting element is received by a photoelectric element, and this light path is made and broken intermittently to generate ignition signals. A plurality of weights or rockers are provided to intercept the passage of light in the light path. The weights are moved outward and inward by the centrifugal force which varies in accordance with the engine speed, and in this way the time interval during which the light is intercepted is varied. The duration of the light intercepting period is varied so that the dwell angle is increased as the engine speed increases. Consequently, even at the high engine speeds, the primary current in the ignition coil is not easily decreased thus preventing the decrease in the secondary voltage, and moreover the function of a centrifugal spark advance mechanism can be concurrently performed.

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Inventors: Senda, Katsuyuki (Toyota, JA)

Application Number: 500876
Filing Date: 1974-08-27
Publication_date: 1976-05-25
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota, JA)
Primary Class(es): 123/406.75 123/146.5A, 123/613, 200/19.23
Other Classes:
US Patent Ref:

3646922	Mar, 1972	Spalding	123/117.
3710131	Jan, 1973	Ford	123/148.
3751610	Aug, 1973	Bednarz	123/148.
3792261	Feb, 1974	Canup et al.	123/148.
3807378	Apr, 1974	Werne, Jr.	123/148.
3810448	May, 1974	Ford	123/32.

Other Refs: 71,823

Feb, 1960	FR

Primary Examiner: Myhre, Charles J.
Assistant Examiner: Devinsky, Paul
Attorney: Stevens, Davis, Miller & Mosher