Title:
【発明の名称】内燃機関の非線形フイ-ドバツク制御装置
Document Type and Number:
Japanese Patent JPH081146
Kind Code:
B2
Abstract:
A single physical model which receives inputs of at least the intake pressure (31) and rotational speed (32) of an internal combustion engine (2) and which produces an output which controls an opening area of an intake passage (17) is developed for a controller (3) to control the idling speed or the output of the internal combustion engine on the basis of modern control theory. When the intake pressure is equal to or less than a predetermined value (critical pressure), the flow velocity of air which is sucked into a cylinder (4a) is fixed at sonic velocity, irrespective of changes in the level of the intake pressure, so the quantity of intake air is proportional to the opening area of the intake passage. Under these conditions, a manipulating quantity for controlling the opening area is determined by multiplying a control quantity outputted from the controller by a predetermined constant. On the other hand, when the intake pressure exceeds the critical pressure, the quantity of air flowing into the cylinder changes in accordance with the difference between the intake pressure and the atmospheric pressure. In that case a manipulating quantity is determined by compensating the control quantity in accordance with the pressure difference.
Inventors:
Akira Ohata
Application Number:
JP9834487A
Publication Date:
January 10, 1996
Filing Date:
April 21, 1987
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D31/00; F02D41/00; F02D41/14; F02D41/16; F02D45/00; (IPC1-7): F02D41/14; F02D45/00
Attorney, Agent or Firm:
Adachi Tsutomu