Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1997-06-25
2000-06-06
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701102, 701104, 60276, 60277, 60285, 123698, F01N 300, G06G 770
Patent
active
060730730
ABSTRACT:
A system for controlling an air/fuel ratio of an internal combustion engine, including a feedback control loop having an adaptive controller (STR controller) that receives as inputs a desired value r and a controlled variable y output from the plant (engine) and an adaptation mechanism that estimates adaptive parameters. The STR controller calculates a feedback correction coefficient KSTR, as an output u based upon at least the adaptive parameters, for correcting a basic amount of fuel supply calculated by retrieving mapped data, prepared beforehand, such that the controlled variable y converges to the desired value r. The system is configured such that the controlled variable y is determined based upon the detected air/fuel ratio KACT and a desired air/fuel ratio KCMD so that the desired value r is a predetermined value. More specifically, the controlled variable is determined to be a ratio between the detected air/fuel ratio and the desired air/fuel ratio such that the desired value r is 1.0 or thereabout. With this arrangement, when the desired air/fuel ratio is changed or corrected frequently, the estimation of the adaptive parameters is not affected, thereby improving the stability of air/fuel ratio control.
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Akazaki Shusuke
Kitagawa Hiroshi
Kitamura Toru
Honda Giken Kogyo Kabushiki Kaisha
Louis-Jacques Jacques H.
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