Method and apparatus for detecting a crank angle in an engine

Details Method and apparatus for detecting a crank angle in an engine Method and apparatus for detecting a crank angle in an engine

2005-06-14

2005-06-14

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S117020, C123S406600

Reexamination Certificate

active

06907342

ABSTRACT:
An apparatus for identifying a cylinder to be ignited in an engine. A plurality of teeth are formed on the periphery of the engine crankshaft. A sensor having two spaced detector parts senses the passage of the teeth. The detector parts identify the passage of a leading or a trailing edge of a tooth. An electronic control unit (ECU) determines the rotating direction of the crankshaft by comparing the signals from the two detector parts. Further, the ECU keeps a count indicating the position of the crankshaft and controls the engine in accordance with the count. The apparatus remembers the position of the crankshaft when the engine stops to improve re-ignition.

REFERENCES:
patent: 5197325 (1993-03-01), Tamura et al.
patent: 5353635 (1994-10-01), Saiki et al.
patent: 5808186 (1998-09-01), Matsumoto et al.
patent: 6041647 (2000-03-01), Matsuoka
patent: 0 128 817 (1984-12-01), None
patent: 6025410 (1985-02-01), None

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