Continuously variable transmission system for vehicle

Details Continuously variable transmission system for vehicle Continuously variable transmission system for vehicle

1996-04-04

1998-08-04

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 46, F16H 900

Patent

active

057885990

ABSTRACT:
A rotation ratio of a continuously variable transmission for a vehicle provided with a pair of variable pulleys whereof the diameter of a contact part with a V-belt is made to vary according to an oil pressure, is controlled according to the running state of a vehicle. An oil pressure control valve is therefore provided to control the oil pressure. A rotation ratio command value is computed from a target rotation ratio set according to the vehicle running state and a control variable set for each rotation ratio according to the dynamic characteristics of the transmission. By inputting a signal based on this rotation ratio command value to the oil pressure control valve, a desirable speed change response is obtained.

REFERENCES:
patent: 4916982 (1990-04-01), Suzuki
patent: 5009127 (1991-04-01), Morimoto et al.
patent: 5009129 (1991-04-01), Morimoto et al.

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