System for controlling vehicle automatic transmission using fuzz

Details System for controlling vehicle automatic transmission using fuzz System for controlling vehicle automatic transmission using fuzz

1992-09-04

1994-06-21

Black, Thomas G.

Boots, shoes, and leggings

74866, 74867, 192 4R, 477 94, 477 97, 477 43, B60K 4126, F16D 4124, G06F 1550, G06G 770

Patent

active

053233182

ABSTRACT:
A system for controlling multi-step geared continuously variable automatic transmission in which a gear ratio to be shifted to is determined by retrieving a conventional preestablished shift diagram by an engine load and a vehicle speed. A fuzzy reasoning is carried out using parameters such as a driving resistance to correct the gear ratio obtained by retrieved. Alternatively, the fuzzy reasoning is carried out to correct one of the engine load and vehicle speed detected and using the corrected value, the shift diagram is retrieved to determine a gear ratio to be shifted to. Further, another fuzzy reasoning is carried out to ascertain the driver's intention to decelerate and the first fuzzy reasoning is carried out using the inferred value so as to reflect the driver's intention in the shift control.

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