The method may comprise estimating an operating condition of the turbocharger, determining a maximum value of an operating parameter as a function of the estimated operating condition of the turbocharger, measuring a value of the operating parameter, determining an error value as {HEAD ~ a function} of {TAIL ~ the maximum value} of the first operating parameter and the measured value of the operating parameter, and limiting fuel supplied to the engine based on the error value 
of
The method may comprise estimating an operating condition of the turbocharger , determining a maximum value of an operating parameter as a function of the estimated operating condition of the turbocharger , measuring a value of the operating parameter , determining an error value as { HEAD ~ a function } of { TAIL ~ the maximum value } of the first operating parameter and the measured value of the operating parameter , and limiting fuel supplied to the engine based on the error value
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH