Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-09-18
1977-08-02
Dority, Jr., Carroll B.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123148CC, 123149C, F02D 1110
Patent
active
040389510
ABSTRACT:
Device for limiting the speed of internal-combustion engines, particularly uitable for small and medium-size, two-stroke engines which operate at rather high revolutions, such as between 2000 and 10000 rpm. Two exemplary embodiments are disclosed. In both, an ignition coil receives a discharge voltage from a capacitor energized by a charging coil, a rectifier being coupled to the output of the charging coil, and a separate tripping coil used in the circuit arrangement, which latter is displaced in phase with respect to the charging coil. A semiconductor switch, preferably a thyristor with steep electrical characteristics, is connected to the capacitor and has its switching gate connected to the tripping coil, the conductive phase of the switch being so controlled by the tripping coil that the charging process of the capacitor is at least partly inhibited when a predetermined maximum engine speed is attained or exceeded. This embodiment is equipped with a full-wave rectifier between the charging coil and the capacitor, and preferably has an adjustable resistor for controlling the required pre-ignition values. In the improved embodiment of the device, a limiting control coil is also provided, with a winding connected opposite to that of the tripping coil, but parallel therewith, preferably both in series with individual diodes. The angular phase displacement of the tripping and/or the limiting control coils is preferably set around 180.degree., with respect to the charging coil, which is most advantageous for achieving the required pre-ignition values.
REFERENCES:
patent: RE27704 (1973-07-01), Carmichael et al.
patent: 3042836 (1962-07-01), Hamilton et al.
patent: 3500809 (1970-03-01), Hohne
patent: 3612023 (1971-10-01), Sohner et al.
patent: 3661132 (1972-05-01), Farr
patent: 3809044 (1974-05-01), Jereb et al.
patent: 3863616 (1975-02-01), Wood
patent: 3880133 (1975-04-01), Katsumata
Collard Allison C.
Devinsky Paul
Dority Jr. Carroll B.
Gehap Gesellschaft fur Handel und Patentverwertung mbH & Co. KG
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