Full title...
"Challenges of simulating ‘fired engine’ ring-liner oil additive/surface interactions in ring-liner bench tribometer"
http://www.maneyonline.com/doi/pdfplus/10.1179/1751584X11Y.0000000003
Paper on testing the correlation between the tribofilms formed in actual engine operation, versus those in "unfired" bench tests, interestingly, using used oil for comparison in the latter as well.
Relatively recent paper too.
Paper notes:
* difference between the tribofilm at TDC versus mid stroke;
* serious difference in the tribofilm on the top ring to that of the liner;
* phosphorous content varies from nearly none to some in the tribofilms;
* Ca/Mg ratio is different on the different parts.
* bench tests, even with the recommended "conditioned" (used) oil aren't representative.
* combustion changes the results.
Recommends that instead of finding a test that replicates combustion, that research focus on why combustion results in what it does.
"Challenges of simulating ‘fired engine’ ring-liner oil additive/surface interactions in ring-liner bench tribometer"
http://www.maneyonline.com/doi/pdfplus/10.1179/1751584X11Y.0000000003
Paper on testing the correlation between the tribofilms formed in actual engine operation, versus those in "unfired" bench tests, interestingly, using used oil for comparison in the latter as well.
Relatively recent paper too.
Paper notes:
* difference between the tribofilm at TDC versus mid stroke;
* serious difference in the tribofilm on the top ring to that of the liner;
* phosphorous content varies from nearly none to some in the tribofilms;
* Ca/Mg ratio is different on the different parts.
* bench tests, even with the recommended "conditioned" (used) oil aren't representative.
* combustion changes the results.
Recommends that instead of finding a test that replicates combustion, that research focus on why combustion results in what it does.
