Vehicle automatic transmission control system

Details Vehicle automatic transmission control system Vehicle automatic transmission control system

1989-06-16

1992-01-07

Gangialosi, Salvatore

Boots, shoes, and leggings

74866, 36443107, B60K 4106

Patent

active

050797050

ABSTRACT:
A system for controlling automatic transmissions equipped with a motor vehicle utilizing fuzzy logic. In the system, fuzzy production rules have been prepared based upon an expert driver's judgments and operation made on a vehicle with a manually shifted transmission. Various operating conditions including opening degree of a throttle valve and road speed of the vehicle are detected and from the detected value, various predictions are made such as an appropriateness of vehicle response to a gearshift intended by the driver and engine output change that would occur should the transmission be shifted to a given gear. These measured or estimated values are put on a common scale named universe of discourse and each membership values degree of the aforesaid rules is successively calculated. Among the rules, one rule is finally selected and according to a gear position indicated in the selected rule, the current gear is shifted up or down or is held at the present position.

REFERENCES:
patent: 4841815 (1989-06-01), Takahashi
patent: 4885690 (1989-12-01), Suhimmel et al.
patent: 4905786 (1990-03-01), Miyake et al.
Jp. Abstract of Appln. 63-246546, 10/13/88.

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