Metal Belt CVT Seizure Monitoring System Using Wear Debris Analysis and Particle Measurement

Kenji Matsumoto; Tatsuya Tokunaga; Jun Mori; Yuji Mihara; Masahiko Kawabata

doi:10.4271/2020-01-0907

An apparatus that automatically samples lubricating oil and measures the size distribution of particles in the oil has been developed in order to monitor the state of engines and transmissions in operation. It is a widely known fact that when an engine or transmission seizes or experiences unusual wear, comparatively large pieces of wear debris are released. The goal of the use of the apparatus is to detect these particles of wear debris, stop testing before damage occurs, and clarify the causes. Seizure was, therefore, artificially induced in a transmission, and the wear debris in the oil was closely analyzed following the test.

The results showed that when the simulated seizure occurred, large, elongated particles of wear debris were produced. Similar wear debris was observed in oil recovered from the market following the seizure of a component, and at present this is believed to be a type of wear debris characteristic of seizure. By knowing in advance the particle counter that predict danger depending on the component being monitored, it was possible to monitor the state of components by measuring the distribution of particle counter in the oil.

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Metal Belt CVT Seizure Monitoring System Using Wear Debris Analysis and Particle Measurement 2020-01-0907

SAE MOBILUS