In-Situ Monitoring of Engine Oils through Electrical AC Impedance Measurements General Motors Research and Development Center

Format:

Conference/Event

Author/Creator:

Halalay, Ion C., author.

Conference Name:

Powertrain & Fluid Systems Conference and Exhibition (2007-10-29 : Chicago, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

The time dependence of the electrical properties for several fully formulated engine oils was tracked during engine dynamometer tests. The pattern for the resistivity indicates the existence of two types of processes (fast ion-depleting and slow ion-releasing) whose existence cannot be inferred through standard engine oil analysis. After these processes have subsided, the change in the resistivity correlates with the change in oil viscosity. We show that the peak value of the resistivity at early test times correlates with oil performance longevity as determined from conventional oil analysis parameters. In addition, the permittivity can provide an early warning of a dangerously low oil level. The significance of the results and their consequences for on-board monitoring of oil life through sensing technology based on electrical ac impedance measurements are discussed

Notes:

Vendor supplied data

Publisher Number:

2007-01-4092

Access Restriction:

Restricted for use by site license