Method and apparatus for controlling a continuously variable automatic transmission
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 24, 2002
Grant Date -
Jun 21, 2001
app pub date -
Dec 18, 2000
filing date -
Dec 18, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a method and apparatus for controlling a driving engine/transmission unit having a continuously variable automatic transmission, the transmission output torque acting upon the driving wheels of a vehicle and the engine reaction torque retroacting upon the driving engine can be adjusted by way of a regulated transmission variable. For operating the control as both a torque and transmission ratio regulator, it is suggested to predefine a desired transmission output torque, and to determine the regulated transmission variable, the transmission output power, a transmission power loss, the power requirement of the driving engine (from the transmission output power and the transmission power loss), a desired engine torque and a desired rotational engine speed, a corrected desired engine torque and/or a corrected desired transmission output torque in conjunction with a change of the regulated transmission variable (torque regulator operation) and/or a desired transmission ratio and a desired engine torque with a change of the regulated transmission variable, in such a manner that a determined actual transmission ratio coincides with a calculated desired transmission ratio (transmission ratio regulator operation).
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