Development of an On-Board Type Oil Deterioration Sensor

Morishita, Shinya; Suzuki, Kenichi; Ashida, Tsuyoshi; Tasaka, Kazuyoshi; Nakada, Masahiko

doi:10.4271/932840

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…When an oil deteriorates a nitrate compound is yielded, which absorbs infrared (IR) radiation with a wavelength of 6.13 µm. This effect was used in a sensor that measured the IR absorption along a fixed path length and attempted to correlate the measurement with oil condition [7]. Repeatability problems were reported, and the technology used may be too expensive for some applications such as automotive engineering.…”

Section: Ir Absorption Sensormentioning

confidence: 99%

Electrical techniques for monitoring the condition of lubrication oil

Turner

Austin

2003

Meas. Sci. Technol.

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The lubricating oil used in engines for vehicle and other applications is renewed according to a schedule specified by the manufacturer. This timetable is, naturally, very conservative, and makes no allowance for the way in which the engine is operated. Constant-speed operation (such as motorway use) is much less harmful to the lubricant than variable-speed operation, such as urban driving, during which the oil experiences extreme variations of temperature and engine speed. The net result of the conservative lubricant replacement schedule is that most engine oil is discarded well before it has reached the end of its useful life.This paper reports a study in which changes to the dielectric and magnetic properties of the oil are assessed as methods of measuring the degradation of lubricating oil. The relationship between oil use (measured by the distance a vehicle has travelled) and oil viscosity is also measured.The conclusions from this work are that simple distance travelled (miles/kilometres) is not a good indicator of the state of an oil, as estimated by measuring its viscosity.The magnetic characteristics of lubricating oil (i.e. its magnetic permeability) do change as the oil degrades, but the measurements were poorly correlated with viscosity and do not seem to offer much promise as the basis of an oil monitoring system.The dielectric properties of lubricating oil are reasonably well correlated with viscosity, and it is proposed that this could form the basis of a useful sensing technique.

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Section: Ir Absorption Sensormentioning

confidence: 99%

Electrical techniques for monitoring the condition of lubrication oil

Turner

Austin

2003

Meas. Sci. Technol.

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“…Oil change indicators that employ algorithms involving oil temperature, vehicle mileage, andor engine revolutions have been installed in some car models (Schwartz and Smolenski 1987). Other researchers have proposed in-line sensors measuring viscosity, pressure drop, solids contamination, or acidity to monitor oil quality and performance (Hunt 1985;Sorab and VanArsdale 1990;Sen and VanArsdale 1992;Morishita et al 1993). The cost and weight of these systems currently discourage installation.…”

Section: I Source Reductionmentioning

confidence: 99%