Influence of oxidation of automatic transmission fluids (ATFs) and sliding distance on friction coefficients of a wet clutch in the running-in stage

作     者：Leonardo Israel FARFAN-CABRERA Ezequiel Alberto GALLARDO-HERNÁNDEZ Manuel VITE-TORRES Jesús Gilberto GODÍNEZ-SALCEDO Leonardo Israel FARFAN-CABRERA;Ezequiel Alberto GALLARDO-HERNÁNDEZ;Manuel VITE-TORRES;Jesús Gilberto GODÍNEZ-SALCEDO

作者机构：Tecnologico de MonterreyEscuela de Ingeniería y CienciasAve.Eugenio Garza Sada 2501Monterrey 64849México Instituto Politécnico NacionalSEPI-Escuela Superior de Ingeniería Mecánica y EléctricaUnidad ZacatencoGrupo de TribologíaCol.LindavistaCiudad de México 07738México Instituto Politécnico NacionalESIQIEIPNCol.LindavistaCiudad de México 07738México 

出 版 物：《Friction》 (摩擦（英文版）)

年 卷 期：2021年第9卷第2期

页      面：401-414页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 082304[工学-载运工具运用工程] 080203[工学-机械设计及理论] 080204[工学-车辆工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0823[工学-交通运输工程] 

基　　金：The authors would like to acknowledge to CNMNIPN for the support in the spectroscopic analyses of our oil samples We also thank to“Laboratorio de Reología y Física de la Materia Blanda”from ESFM-Instituto Politécnico Nacional for the assistance and equipment support for the viscosity measurements of our oil samples 

主　　题：wet clutch friction oil oxidation automatic transmission fluid(ATF) 

摘      要：In this paper,the influence of oxidation of automatic transmission fluids(ATFs)and sliding distance on the friction coefficients of a wet clutch in approached running-in conditions was *** ATFs were oxidized by a laboratory process approaching oxidation occurred in actual *** was evaluated by means of increase in carbonyl compounds and depletion of zinc dialkyldithiophosphates(ZDDPs)***,the changes in kinematic viscosity and viscosity index were ***-ondisk tests were conducted to replicate the actual sliding contact in a wet *** pin specimens were cut from friction material composite plates and the disks were actual steel separators both from an automotive wet *** coefficient, μ,was measured at progressive sliding velocity,ν,to obtain μ–νcurves at 26 and 100°*** μ–νtests were consecutively run using the same pair of specimens and *** cumulative sliding distance for each μ–νtest generated surface flattening using the *** friction coefficients of the wet clutch increased due to the ATFs oxidation meanwhile the dm/dv values decreased in most *** suggests that ATF oxidation can enhance torque capacity of the wet clutch,but it could reduce anti-shudder *** sliding distance improved the slopes in the μ–νresults using fresh ATFs meanwhile it generated a slope decrease by using aged ATFs.