Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-06-27
1990-01-16
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123417, 123478, 364148, 36443105, F02P 515, F02D 4126
Patent
active
048936006
ABSTRACT:
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.
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Lucas Industries PLC
Wolfe Willis R.
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