Continuously variable transmission controller and control method

Details Continuously variable transmission controller and control method Continuously variable transmission controller and control method

1997-04-11

1998-10-13

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 48, F16H 900

Patent

active

058205144

ABSTRACT:
An external disturbance compensating output computing unit comprising a low pass filter is provided in a speed change controller of a continuously variable transmission. A real speed change ratio, and an actuator position signal or a speed change ratio command value are input to the external disturbance compensating output computing unit. The actuator position signal or speed change ratio command value of a speed change mechanism control unit are selectively assigned to a value input to the low pass filter according to a difference between the real speed change ratio and a target speed change ratio. When the difference between the real speed change ratio and target speed change ratio is small, non-linear characteristics of the speed change mechanism are compensated, and when the difference is large, the non-linear characteristics of the speed change mechanism are not compensated. In this way, a desired speed change response is obtained regardless of driving conditions.

REFERENCES:
patent: 5611748 (1997-03-01), Kashiwabara
patent: 5628705 (1997-05-01), Kashiwabara
patent: 5669847 (1997-09-01), Kashiwabara
patent: 5695428 (1997-12-01), Yuasa et al.
patent: 5707314 (1998-01-01), Kashiwabara et al.
patent: 5720692 (1998-02-01), Kashiwabara

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