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    • Research on the Speed Measurement System and Skidding Characteristics of Cam–Roller of Internal Combustion Engines
    DOI：10.13949/j.cnki.nrjgc.2023.02.008
    Key Words:internal combustion engine  cam–roller  skidding characteristic  giant magneto resistive（GMR） sensor
    Author NameAffiliationE-mail
    HUANG Jisong* School of Mechanical and Automotive Engineering， Qingdao University of Technology， Qingdao 266520， China 545202621@qq.com 
    GUO Feng* School of Mechanical and Automotive Engineering， Qingdao University of Technology， Qingdao 266520， China mefguo01@qut.edu.cn 
    LI Xinming School of Mechanical and Automotive Engineering， Qingdao University of Technology， Qingdao 266520， China  
    LI Shuyi School of Mechanical and Automotive Engineering， Qingdao University of Technology， Qingdao 266520， China  
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    Abstract:A roller speed measurement system based on a certain type of internal combustion engine cam-roller mechanism was built， and the characteristics of roller skidding was preliminarily studied. A giant magneto resistance（GMR） sensor was used to measure the rotational speed of the roller， and the average skidding value between the cam and the roller under actual motion was obtained. The experimental results show that there is indeed skidding between the cam and the roller under real working conditions， and the skidding is affected by the working conditions. With the increase of the cam speed， the roller skidding increases overall. The skidding between the cam and the roller can be inhibited by increasing the cam–roller contact pressure， and low-viscosity lubricating oil can also reduce the skidding.
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