Rotational reference position detection apparatus

Details Rotational reference position detection apparatus Rotational reference position detection apparatus

1984-03-07

1985-11-19

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

123414, G01M 1500

Patent

active

045534276

ABSTRACT:
An engine crank angle determining arrangement including a rotor having teeth or slits wherein either a tooth is entirely omitted or the teeth or slits are formed with non-uniform intervals therebetween. The teeth or slits are detected by an electromagnetic pick-up device or a photocoupler, and the time intervals corresponding to the intervals between the teeth or slits in the signal thus detected are processed in accordance with a predetermined program. The time intervals thus processed are corrected in consideration of an engine low state or non-low state operating condition, such as for example transient condition or starting condition, of the engine. Processing is carried out in either of two different ways of calculating reference angles. One is based on a ratio of time differences between adjacent sensible elements when the engine is operated in a "low state", and the other is based on a time difference between the detected times of adjacent sensible elements when the engine is operated in a "non-low state". Accordingly an accurate angular position can be detected regardless of a single set of the pulse generating device and pulse detecting device.

REFERENCES:
patent: 4262251 (1981-04-01), Fujishiro et al.
patent: 4356447 (1982-10-01), Honig et al.

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