Internal-combustion engines – High tension ignition system – Having engine component position sensor
Reexamination Certificate
2005-01-11
2005-01-11
Mohanty, Bibhu (Department: 3747)
Internal-combustion engines
High tension ignition system
Having engine component position sensor
C123S616000, C123S617000
Reexamination Certificate
active
06840236
ABSTRACT:
To accurately detect occurrence of erroneous detection of a crank pulse associated with dropout of a crank pulse or occurrence of noise.A cogless section is provided in cogs provided on an outer periphery of a crankshaft for transmitting a crank pulse. Occurrence of erroneous detection of a crank pulse is detected through use of an instantaneous rotational speed of the crankshaft computed from a crank pulse assigned to the cogless section and crank pulses assigned to cogs before and after the cogless section. When too few crank pulses are detected, a rapid increases arises in the instantaneous rotational speed of the crankshaft computed from the crank pulses after occurrence of a rapid decrease. The number of detected cramp pulses—which are fewer than the original crank pulses—is detected from the number of crank pulses existing between occurrence of a rapid decrease and occurrence of a rapid increase. When a too many crank pulses are detected, a rapid decrease arises in the instantaneous rotational speed of the crankshaft after occurrence of a rapid increase. The number of detected crank pulses—which are greater in number than the original crank pulses—is detected from the number of crank pulses existing between occurrence of a rapid increase and occurrence of a rapid decrease.
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Hasegawa Hitoshi
Sawada Yuichiro
Takahashi Michiyasu
Hogan & Hartson LLP
Mohanty Bibhu
Yamaha Hatsudoki Kabushiki Kaisha
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