Interrelated power delivery controls – including engine control – Transmission control – Continuously variable friction transmission
Reexamination Certificate
2007-06-11
2010-02-02
Ho, Ha D. (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
Continuously variable friction transmission
C477S048000, C477S050000, C477S164000
Reexamination Certificate
active
07654935
ABSTRACT:
A maximum flow calculating unit calculates a maximum amount of hydraulic fluid that can flow into or out of an input-side hydraulic cylinder when a shift control command signal is set to a reference DUTY value, based on an estimated valve pressure difference calculated by an estimated pressure difference calculating unit, and a post-guard target sheave position setting unit performs a guard process for restricting the amount of change of the sheave position, using a guard value calculated by a guard value calculating unit based on the maximum flow amount, so as to set a post-guard target sheave position. Since the thus set target sheave position does not undergo excessive large changes nor excessively small changes during shifting, a target value for shifting is set so that a feedforward controlled variable determined based on the amount of change of the target sheave position becomes an appropriate value.
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Hino Akira
Matsui Yasunari
Tamura Tadashi
Tanaka Naoto
Taniguchi Hiroji
Ho Ha D.
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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