In order to reduce friction and predict wear of the sliding part, it is important to determine the oil film thickness of particular area. A sensor or similar device must be attached to the sliding surface to detect the oil film thickness. However, a sensor could not be attached, due to the lack of space on contact surface, and moreover there was no method to secure the sensor on contact surface at that time. A several-micrometer-t
hin-film sensor was installed on a sliding surface to attempt measurement, but since the sensor was attached on a contact surface, wear occurred immediately and data was unable to be obtained. To accomplish above issue, we developed a protective layer with excellent wear-resistance that successfully extended the measurement time by protecting the thin-film sensor. In order to measure pressure during driving, we provided a PVD (Physical Vapor Deposition) thin-film sensor of several micrometers on the drive transmission surface of a CVT (Continuously Variable Transmission) pulley. In addition, we were able to obtain data rapidly from parts during driving by independently developing an ultra-micro data logger (A/D conversion board + memory) and mounting it to mobile parts. In this paper, we describe the issues that must be solved in relation to the measurement method.
In order to reduce friction and predict wear of the sliding part, it is important to determine the oil film thickness of particular area. A sensor or similar device must be attached to the sliding surface to detect the oil film thickness. However, a sensor could not be attached, due to the lack of space on contact surface, and moreover there was no method to secure the sensor on contact surface at that time. A several-micrometer-thin-film sensor was installed on a sliding surface to attempt measurement, but since the sensor was attached on a contact surface, wear occurred immediately and data was unable to be obtained. To accomplish above issue, we developed a protective layer with excellent wear-resistance that successfully extended the measurement time by protecting the thin-film sensor. In order to measure pressure during driving, we provided a PVD (Physical Vapor Deposition) thin-film sensor of several micrometers on the drive transmission surface of a CVT (Continuously Variable Transmission) pulley. In addition, we were able to obtain data rapidly from parts during driving by independently developing an ultra-micro data logger (A/D conversion board + memory) and mounting it to mobile parts. In this paper, we describe the issues that must be solved in relation to the measurement method.
