Control apparatus for automatic transmission and control method therefore
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United States of America Patent
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-
Dec 31, 1996
Grant Date -
N/A
app pub date -
Apr 27, 1995
filing date -
Apr 27, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Detecting means for detecting driving conditions of a vehicle such as engine load such as throttle opening, vehicle speed, gear position or gear ratio and so on and memory means for storing characteristics of the vehicle such as engine power characteristic, torque converter characteristic, fuel consumption rate characteristic and so on are provided. Driving shaft torques before and after gear shift, an estimating value of fuel consumption rate and a gear shift point of a transmission are calculated in real time to perform transmission control using the signals from said detecting means and the signals from said memory means. With the construction according to the present invention described above, an automatic transmission can be controlled in real time by calculating a gear shift point of the transmission in a short time through estimating the driving shaft torques before and after gear shift.
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