US 6,230,486 B1Granted

Plant control system

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsYuji Yasui, Shusuke Akazaki, Tadashi Sato, Masaki Ueno, Yoshihisa Iwaki

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Abstract

A plant control system has a reference value setting unit for variably setting a reference value for an air-fuel ratio to be given to an exhaust system including a catalytic converter, depending on a component based on an adaptive control law of a manipulated variable of the air-fuel ratio generated by a controller according to an adaptive sliding mode control process in order to converge an output of an O2 sensor disposed downstream of the catalytic converter to a target value. The manipulated variable generated by the controller represents the difference between the air-fuel ratio and the reference value, required to converge the output of the O2 sensor to the target value.

Claims16

Dependent claims

A plant control system for controlling a plant, comprising:

an actuator for generating an input to the plant;
first detecting means for detecting an output from the plant;
manipulated variable determining means for sequentially generating a manipulated variable which manipulates the input to the plant to converge the output from said first detecting means to a predetermined target value according to a feedback control process constructed based on a model of a behavior of the plant as a system for generating the difference between the output from said first detecting means and a target value with at least a response delay from the difference between the input to the plant and a predetermined reference value;
actuator control means for controlling operation of said actuator based on said manipulated variable to manipulate the input to the plant;
and
reference value variable setting means for variably setting said predetermined reference value depending on the manipulated variable generated by said manipulated variable determining means.

3 more elements

Dependencies are inferred from the claim text.