Ford Global Technolgoies, LLC

Delphi Technologies, Inc.

Charles Irwin Rackmil

Gerard Wladyslaw Malaczynski

Christopher Semanson

Daniel Lee McKay

Kevin Douglas Macfarlane

Robert Milton

Amanda Perkins

Dennis Witt

Methods and systems are provided for filtering an oil dilution amount based on a current value of the oil dilution amount. In one example, filtering the oil dilution amount may include decreasing a sensitivity of filtering at lower oil dilution below a threshold; otherwise, increasing the sensitivity of filtering. The sensitivity of the filtering may be decreased by implementing a larger time constant, while the sensitivity of the filtering may be increased by implementing a smaller time constant.

System and method for reducing engine oil dilution

A method for inferring Indicated Mean Effective Pressure as total transient indicated engine torque in an internal combustion engine, comprising the steps of acquiring at least one crankshaft time stamp for use in determining a cylinder-specific engine velocity; calculating an incremental change in engine kinetic energy from the previously fired cylinder (j&#x2212;1) to the currently fired (j) cylinder using the cylinder-specific engine velocity; equating the incremental change in engine kinetic energy to a change in energy-averaged cylinder torque (IMEP) from the previously-fired (j&#x2212;1) to a currently-fired (j) cylinder; summing a plurality of the incremental changes in engine kinetic energy over time to determine a value of the transient component of indicated torque; determining a value of the quasi-steady indicated engine torque; and adding the value of transient component of indicated torque to the value of quasi-steady indicated engine torque to yield the Indicated Mean Effective Pressure.

Method for estimation of indicated mean effective pressure for individual cylinders from crankshaft acceleration

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Ypsilanti, MI, United States of America

Charles Irwin Rackmil