Viscosity detection using sump

摘要

Various methods for inferring oil viscosity and/or oil viscosity index in an internal combustion engine are provided. In one aspect, a new control method comprises: after engine shutdown, learning engine oil viscosity based on time to drain the oil back into an engine sump and oil temperature during the draining, and correcting an engine operating parameter based on the learned oil viscosity.

主权项

1. A method for controlling an engine, comprising:
after engine shutdown, learning engine oil viscosity based on time to drain oil back into an engine sump and oil temperature during said draining; and correcting an engine operating parameter based on said learned oil viscosity, said engine operating parameter comprising a throttle plate controlled by an engine controller for controlling air inducted into the engine.