Rotational signal detecting apparatus for internal combustion engine
Patent
·
OSTI ID:6487634
This patent describes a rotational signal detecting apparatus comprising: a housing; a rotor shaft attached to the housing so as to be freely rotatable, the rotor shaft rotating in synchronism with a crankshaft or a cam shaft of an engine; a photoelectric pickup comprising a first rotating portion fixed to the rotor shaft so as to rotate with the rotor shaft as one body, a first fixed portion attached to the housing, the fixed portion having photoelectronic conversion means for outputting a signal varying according to the quantity of incident light varied in synchronism with the rotation of the rotating portion, the first rotating portion and the photoelectric conversion means comprising a first reference signal detecting means for generating a first reference signal each time the crankshaft rotates by a first predetermined angle and a position signal detecting means for generating q position signal each time the crankshaft rotates by a second predetermined angle which is smaller than the first predetermined angle; and an electromagnetic pickup comprising a second rotating portion fixed to the rotor shaft so as to rotate with the rotor shaft as one body and a second fixed portion integrally attached to the housing.
- Assignee:
- Hitachi Ltd., Tokyo
- Patent Number(s):
- US 4773381
- OSTI ID:
- 6487634
- Country of Publication:
- United States
- Language:
- English
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