F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 61/64 (2006.01) F16H 59/72 (2006.01) F16H 63/40 (2006.01) F16N 29/00 (2006.01) G01F 23/00 (2006.01) F16H 61/12 (2006.01)
Patent
CA 2099459
An apparatus and technique for fluid level determination in automatic transmissions. The invention employs an electronic control unit in association with an automatic transmission for a vehicle, the electronic control unit receiving data corresponding to transmission oil level, transmission oil temperature, engine speed, transmission speed, and transmission selected range. Upon determining that such data satisfies certain diagnostic tests, the level of transmission fluid within the transmission is determined and adjusted or otherwise normalized to ideal test conditions. The electronic control unit compensates an oil level signal for deviations in oil temperature from an optimum test temperature, and makes further compensation for deviations in engine speed and settling time at the time that the test data is acquired. Additionally, variations in oil density as a function of oil temperature are also compensated.
Lee Ronald Alan
Mccauley Phillip Franklin
Murray William Michael
Niemczyk Robert Thomas
Wilson Thomas Howard
General Motors Corporation
Gowling Lafleur Henderson Llp
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