Apparatus for detecting rotational angular position for internal

Details Apparatus for detecting rotational angular position for internal Apparatus for detecting rotational angular position for internal

1992-09-02

1993-11-23

Hoff, Marc S.

Coded data generation or conversion

Digital pattern reading type converter

Incremental

341 6, H03M 130

Patent

active

052648443

ABSTRACT:
An apparatus for detecting the angular position for an internal combustion engine is capable of accurately detecting the angular position by a simple structure without being influenced by changes in the period of angular position signals due to inaccuracy of rotor contour and a change in rotational speed. Up-down counters up and down count clock pulses in response to the pulse train from a rotation sensor for determining information on unequal interval corresponding to a reference position in the pulse train. The frequency of the angular position is divided by a frequency dividing circuit. Up-down counting of clock pulses by the first and second up-down counters is terminated within two periods of the angular position signal. The outputs of the first and second up-down counters are alternatively up counted and down counted every one period of the angular position signal to determine the reference angular position based upon any one of determination outputs from up-down counters.

REFERENCES:
patent: 3967271 (1976-06-01), Day
patent: 4233592 (1980-11-01), Leichle
Journal of Nippondenso Technical Disclosure No. 78-070 (dated May 15, 1991).
Journal of Nippondenso Technical Disclosure No. 78-069 (dated May 15, 1991).
Journal of Nippondenso Technical Disclosure No. 78-071 (dated May 15, 1991).

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