Method and apparatus for inferring engine oil temperature for us

Details Method and apparatus for inferring engine oil temperature for us Method and apparatus for inferring engine oil temperature for us

1994-12-12

1997-05-27

Chin, Gary

Boots, shoes, and leggings

340449, 3404574, 340438, F01M 1100

Patent

active

056337965

ABSTRACT:
An electronic engine controller infers the instantaneous temperature of lubricating oil in an engine by determining a steady state oil temperature value as a function of engine speed and aircharge, determining an oil temperature time constant as a function of mass air flow rate and determining the instantaneous oil temperature as a function of the steady state oil temperature and the oil temperature time constant. The engine controller also determines an oil change interval as a function of the inferred oil temperature and the number of engine revolutions.

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