Control apparatus for vehicle power transmitting system includin

Details Control apparatus for vehicle power transmitting system includin Control apparatus for vehicle power transmitting system includin

1987-11-30

1989-06-06

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74870, B60K 414

Patent

active

048360562

ABSTRACT:
A control apparatus for a vehicle for a continuously variable transmission (CVT) whose speed ratio is continuously variable, the apparatus including a mode selector responsive to a currently required output of an engine, for selecing one of a continuously variable speed mode in which the speed ratio of the CVT is continuously changed, and a stepping shift mode in which the speed ratio is changed in a plurality of steps. The apparatus further includes a first control device operable in the continuously variable speed mode, for continuously changing the speed ratio of the continuously variable transmission so as to operate the engine with minimum fuel consumption, and a second control device operable in the stepping shift mode, for selecting one of a plurality of speed-ratio positions corresponding to the above-indicated plurality of steps, and for maintaining the selected speed-ratio position, based on the detected currently required output of the engine and the detected running speed of the vehicle.

REFERENCES:
patent: 4543855 (1985-10-01), Oetting et al.
patent: 4594916 (1986-06-01), Ito et al.
patent: 4610183 (1986-09-01), Nobumoto et al.
patent: 4656587 (1987-04-01), Osanai et al.
patent: 4663991 (1987-05-01), Nakamura et al.
patent: 4704683 (1987-11-01), Osanai et al.
patent: 4727771 (1988-03-01), Niwa et al.

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