Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2000-06-05
2001-10-09
Cuchlinski, Jr., William A. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C701S058000, C074S336001, C074S335000, C074S473100
Reexamination Certificate
active
06301537
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method/system for calibrating a position sensor for sensing the X-Y position of a shift member in a vehicular transmission shifter. More particularly, the present invention relates to an adaptive technique for calibrating the neutral Y-Y position in an X-Y position sensor for sensing the position of a shift member movable in an “H-type” shift pattern.
2. Description of the Prior Art
Manually operated shift levers and X-Y shifters for moving a shift member, such as a shift finger or the like, in an H-type shift pattern are well known in the prior art, as may be seen by reference to U.S. Pat. Nos. 5,481,170; 5,281,902; 4,899,607; 4,821,590; 4,784,007; 4,455,883 and 4,515,029, the disclosures of which are incorporated herein by reference.
Position sensors of the discrete position type for sensing discrete X-Y positions of a shift member in an H-type shift pattern are known in the prior art, as may be seen by reference to U.S. Pat. Nos. 4,817,468 and 4,718,307. Sensors providing analog or digital signals, the magnitude of which are representative of the X-X and/or Y-Y position of a shift member in an H-type shift pattern, are known in the prior art, as may be seen by reference to U.S. Pat. Nos. 5,911,787; 5,743,143 and 5,950,491, the disclosures of which are incorporated herein by reference.
SUMMARY OF THE INVENTION
In accordance with the present invention, an adaptive technique for calibrating the value of a control signal corresponding to the neutral Y-Y position of a shift member movable in an H-type shift pattern is provided.
The foregoing is accomplished by providing a sensor providing a first signal having a magnitude corresponding to X-X position, and a second signal having a magnitude corresponding to Y-Y position, of a shift member in an H-type shift pattern. When the change in the first signal, or preferably the rate of change in the first signal, exceeds a reference value, the magnitude of the second signal is taken as the value corresponding to the shift member being in the neutral Y-Y position in the shift pattern. To prevent anomalies, the value of the second signal corresponding to a neutral position will preferably be filtered in an averaging technique (see U.S. Pat. No. 5,490,063, the disclosure of which is incorporated herein by reference).
Accordingly, it is an object of the present invention to provide an improved method/system for adaptively calibrating an X-Y position sensor for a shift member movable in an H-type shift pattern.
This and other objects and advantages of the present invention will become apparent from a reading of the following description of the preferred embodiment taken in connection with the attached drawings.
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Cuchlinski Jr. William A.
Eaton Corporation
Gordon Howard D.
Hernandez Olga
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