CVT control system

Details CVT control system CVT control system

1996-08-30

1998-07-21

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 44, B60K 4114

Patent

active

057827192

ABSTRACT:
A control system for an engine-CVT drivetrain conducts conversion of speed ratio command to displacement command of an input element of a ratio control mechanism of the CVT beyond limits of a predetermined displacement range that corresponds to a predetermined speed ratio window having, as a lower limit, a lowest speed ratio and, as an upper limit, a highest speed ratio, providing improved driveability upon moving from a standstill and improved fuel economy. The speed ratio command is given by subtracting a disturbance compensated speed ratio from a dynamic characteristic compensated speed ratio.

REFERENCES:
patent: 4720793 (1988-01-01), Watanabe et al.
patent: 4999774 (1991-03-01), Tokoro et al.
patent: 5067372 (1991-11-01), Suzuki
patent: 5439424 (1995-08-01), Sawada et al.
patent: 5545106 (1996-08-01), Senger et al.
patent: 5612873 (1997-03-01), Ogawa

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