Continuously variable transmission

Details Continuously variable transmission Continuously variable transmission

1995-07-21

1998-05-05

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 46, 474 18, B60K 4112

Patent

active

057466785

ABSTRACT:
A continuously variable transmission, in particular for a motor vehicle, provided with a control for the transmission ratio of the transmission, which control in a first operating mode controls the transmission ratio on the basis of one or more input signals and in a second operating mode controls the transmission ratio, for example on the basis of an external signal originating from the driver of the motor vehicle, along one or more control curves of one or more sets of control curves, possibly within rotational speed limits imposed on the input speed of the transmission. One or more control curves and/or one or more rotational speed limits are a function of the input speed of the transmission in such a way that, in accordance with those functions, the input speed of the transmission is not zero for a notional output speed of the transmission of zero. In this way the drive characteristics of the transmission are appreciably improved, coupled with improved efficiency and optimum power.

REFERENCES:
patent: 4793217 (1988-12-01), Morisawa et al.
patent: 4827803 (1989-05-01), Miyawaki
patent: 4872377 (1989-10-01), Nakamura
patent: 4875892 (1989-10-01), Sueda
patent: 4890516 (1990-01-01), Suzuki
patent: 4948370 (1990-08-01), Yamada
patent: 4977798 (1990-12-01), Takahashi
patent: 5319999 (1994-06-01), Morishige et al.
patent: 5382206 (1995-01-01), Oda et al.
patent: 5439424 (1995-08-01), Sawada et al.

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