Method for detecting rotational speed

Details Method for detecting rotational speed Method for detecting rotational speed

2005-05-10

2005-05-10

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

C701S102000

Reexamination Certificate

active

06892130

ABSTRACT:
In a method for detecting rotational speed of an internal combustion engine (1), a sector wheel (4) which is driven by the internal combustion engine (1) is scanned, the throughflow of a specific segment of the sector wheel is detected, the duration of said segment-throughflow is measured and a rotational speed value is determined therefrom. Additionally, the throughflow of a specific part of the segment is detected before and after determination of the rotational speed value and a gradient of the duration of the partial segment throughflow is determined in order to update the rotational speed value.

REFERENCES:
patent: 4982330 (1991-01-01), Karle et al.
patent: 39 39 113 (1991-05-01), None
patent: 4215581 (1993-11-01), None
patent: 0367993 (1989-09-01), None
patent: 2134265 (1984-08-01), None
patent: 2346449 (2000-08-01), None

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