System for controlling a continuously variable transmission havi

Details System for controlling a continuously variable transmission havi System for controlling a continuously variable transmission havi

1990-10-29

1992-03-17

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

74867, 192 331, 192 092, 475 65, B60K 4128, B60K 4112

Patent

active

050957767

ABSTRACT:
A continuously variable belt drive transmission has a torque converter with a lockup clutch. The lockup clutch is engaged in accordance with driving conditions of the torque converter. Quantity of downshifting the transmission is decided in dependency on changing rate of speed of an input member of the transmission so that the speed of the input member coincides with speed of the engine. The transmission is downshifted by the downshift quantity and the lockup clutch is engaged so as to change the engine speed at a substantially constant rate.

REFERENCES:
patent: 4478322 (1984-10-01), Carlson et al.
patent: 4522086 (1985-06-01), Haley
patent: 4733582 (1988-03-01), Eggert et al.
patent: 4768632 (1988-09-01), Moan
patent: 4782934 (1988-11-01), Takano et al.
patent: 4790216 (1988-12-01), Eggert et al.
patent: 4843918 (1989-07-01), Morimoto
patent: 4898050 (1990-02-01), Sakai
patent: 4909103 (1990-03-01), Morimoto

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