In-situ oil condition monitoring in passenger cars
- GM Research and Development Center, Warren, MI (United States)
Oil condition sensors which had a two-electrode structure with an interdigitated pattern and roughened electrodes were fabricated using micromachining techniques. With an AC sawtooth waveform voltage source applied to the sensor electrodes, a current dependent on the oil condition can be measured and converted to a DC voltage output. The sensors were mounted on the dipsticks of test cars and were used for in-situ engine oil degradation monitoring over 20320 km (12700 miles). The duration of the testing was from winter to summer, and both normal and short distance driving were tested. Measured sensor outputs were also compared with oil analysis results. There was a strong correlation between the sensor output and the condition of the oil as confirmed by the oil analysis. 12 refs., 3 figs., 3 tabs.
- OSTI ID:
- 186177
- Journal Information:
- Lubrication Engineering, Vol. 50, Issue 8; Other Information: PBD: Aug 1994
- Country of Publication:
- United States
- Language:
- English
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