©　2017,　Chinese　Society　for　Internal　Combustion　Engines(CSICE).　All　right　reserved.　Based　on　nonlinear　dynamic　oil-film　forces,　a　more　precise　temperature　prediction　model　of　the　floating　ring　bearings　of　a　turbocharger　was　presented.　In　this　model,　the　influences　of　thermal　effect　on　oil　viscosity　and　bearing　deformation　were　considered,　and　the　influences　of　pressure　flow　and　shear　flow　on　the　ring　speed　ratio　(floating　ring　speed　to　rotor　spin　speed　ratio)　were　also　taken　into　account.　The　oil　return　flow　temperatures　measured　from　experiments　were　compared　with　the　simulated　results.　The　analysis　results　indicate　that　the　errors　of　the　model　are　in　an　allowable　range,　verifying　the　effectiveness　of　the　model.　The　relationship　between　oil　temperature　and　rotor　spin　speed　is　nearly　linear.　The　variations　of　temperature,　oil　viscosity,　ring　speed　ratio　and　bearing　clearance　are　in　reasonable　ranges.　And　the　floating　ring　bearings　work　well.　This　would　be　theoretical　foundations　for　the　future　R&D　and　structural　optimization　of　the　floating　ring　bearings.