Title:
DIGITAL CONTROLLER
Document Type and Number:
WIPO Patent Application WO/1991/010057
Kind Code:
A1
Abstract:
A device for controlling the engine speed in idling of an internal combustion engine to which so-called ''modern control theory'' is applied, and is directed to improve drastically the converging speed to a target number of revolution. The present invention updates the values of state variables even in an open-loop control state, to calculate initial values at the time of shift to feedback control. When a change of state of an external load is detected, an integration value is corrected in a feed-forward manner before it is limited to a predetermined range integration value limiting means in accordance with such a change of state. The present invention divides dynamic model for a control system into a dead time portion and a portion after the dead time portion, and identifies the dynamic model by a discrete system for each of these portions to configurate it.
Inventors:
KAWAI KATSUHIKO (JP)
KATO TATSUNORI (JP)
NAKABAYASHI KATSUHIKO (JP)
IIDA HISASHI (JP)
ISOMURA SHIGENORI (JP)
KONDO TOSHIO (JP)
KATO TATSUNORI (JP)
NAKABAYASHI KATSUHIKO (JP)
IIDA HISASHI (JP)
ISOMURA SHIGENORI (JP)
KONDO TOSHIO (JP)
Application Number:
PCT/JP1990/001684
Publication Date:
July 11, 1991
Filing Date:
December 25, 1990
Export Citation:
Assignee:
NIPPON DENSO CO (JP)
International Classes:
F02D31/00; F02D41/08; F02D41/14; F02D41/16; (IPC1-7): F02D41/14; F02D41/16; F02D45/00
Foreign References:
JPS6328225A | 1988-02-05 | |||
JPS6340929A | 1988-02-22 | |||
JPS648336A | 1989-01-12 | |||
JPS6375334A | 1988-04-05 | |||
US4860707A | 1989-08-29 |
Other References:
See also references of EP 0474871A1
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