Patent ID: 6804601
Filing Date: 2004-10-12
Classification: F02D,G05B,Y02T

Abstract:
System for accommodating sensor failure in the operation of an internal combustion engine, the system comprising:a sensor producing a first engine operating condition signal indicative of a first engine operating condition; means for determining whether said sensor exhibits an in-range failure; means for determining whether said sensor exhibits an out-of-range failure; means for setting a failure flag if said sensor exhibits either of said in-range failure and said out-of-range failure, and otherwise clearing said failure flag; means for estimating said first engine operating condition as a function of a number of engine operating parameters different than said first engine operating condition and producing a corresponding first engine operating condition estimate; and means for producing a first engine operating condition value indicative of said first engine operating condition, said first engine operating condition value corresponding to said first engine operating condition estimate if said failure flag is set and corresponding to said first engine operating condition signal if said failure flag is cleared.