초록 ▼

An adaptive control system and method is provided for a power producing engine having at least one control parameter which affects an engine output, where the engine has a drivetrain combination having at least one resonant frequency. A base value is established for one control parameter in accordan

An adaptive control system and method is provided for a power producing engine having at least one control parameter which affects an engine output, where the engine has a drivetrain combination having at least one resonant frequency. A base value is established for one control parameter in accordance with engine operating conditions. The one control parameter is preferably perturbed about the base value in accordance with a perturbation waveform having a frequency greater than the at least one resonant frequency of the drivetrain. The perturbation waveform has a cycle including a first part and a second part. A positive perturbation is applied to the perturbed parameter during the first part of each cycle and a negative perturbation is applied to the perturbed parameter during the second part of each cycle. The engine output is monitored and the slope of the engine output is calculated with respect to at least one control parameter for the engine so as to obtain a desired value of the slope. In a preferred embodiment the perturbation frequency is greater than the resonant frequency of the drivetrain.

대표청구항 ▼

An adaptive control system for an internal combustion engine having cylinders and at least one engine control parameter affecting an engine output, said control system comprising; (a) means for establishing a base value for an engine control parameter; (b) perturbation generation means for perturbin

An adaptive control system for an internal combustion engine having cylinders and at least one engine control parameter affecting an engine output, said control system comprising; (a) means for establishing a base value for an engine control parameter; (b) perturbation generation means for perturbing said an engine control parameter about said base value, said perturbation means comprising means for generating a perturbation waveform having a cycle comprising a first part and a second part and for applying a positive perturbation to said an engine control parameter during said first part of each said cycle and a negative perturbation to said an engine control parameter during said second part of each said cycle, said first part and said second part of said waveform having respective durations such that each cylinder of said engine experiences equal numbers of said positive perturbations and said negative perturbations compared with other cylinders irrespective of engine speed; (c) monitoring means for monitoring said engine output; (d) slope calculation means, responsive to said monitoring means, for calculating a slope of said engine output with respect to said an engine control parameter; and (e) correction means, responsive to said slope calculation means, for applying corrections to said at least one engine control parameter so as to obtain a desired value of said slope, wherein said engine has a drivetrain combination having at least one resonant frequency, and said perturbation waveform has a perturbation frequency greater than said resonant frequency of said drivetrain.