Multichannel optical sensor for oil film pressure measurement in engine main bearing

Helena Ronkainen (Corresponding Author), Ari Hokkanen, Markku Kapulainen, Ingmar Stuns, Simo Varjus, Raimo Turunen, Sami Nyyssönen, Jari Halme

    Research output: Contribution to journalArticleScientificpeer-review


    An optical sensor has been developed for experimental determination of oil film pressure in journal bearings. The non-intrusive fibre optic sensor is integrated in the sliding surface of the bearing to measure the actual oil film pressure under load without disturbing the actual tribological contact conditions. The sensors with a multichannel system also allowed the use of several optical sensors simultaneously. Four optical sensors were integrated in a hydrodynamic journal bearing of a large scale diesel engine and the engine tests were carried out with different loads to study the sensor operation in demanding operating conditions. The oil film pressure was successfully measured and the results showed differences in bearing pressure depending on the position of the sensor and on the operating cycle of the cylinders. The optical sensor was capable to measure the oil film pressure in journal bearing with a good sensitivity and repeatability during the tests.
    Original languageEnglish
    Pages (from-to)20-26
    Number of pages6
    Issue number3 - 4
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed


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