Apparatus for detecting gear positions of automobile transmission
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United States of America Patent
Stats
-
Jan 15, 2002
Grant Date -
N/A
app pub date -
Dec 17, 1999
filing date -
Dec 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gear position detecting apparatus includes three magnets fixed to a transmission housing for generating magnetism and three hole elements fixed to the transmission housing for detecting magnetism generated from the magnets. A magnetism shielding plate is provided between the magnets and the hall elements. The magnetism shielding plate is slidably and rotatably movable according to a shift pattern of a shift lever and has a plurality of holes and a cut-out portion. The magnetism generated from the magnets is permitted or forbidden to pass through these holes or the cut-out portion according to the movement of the magnetism shielding plate which is moved by the shift lever. The hall elements output an ON-signal when the magnetism is permitted to pass through and an OFF-signal when the magnetism is forbidden to pass through. As a result, a plurality of combinations of binary signals are produced corresponding to gear positions.
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