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    • Study of Failure Diagnosis of Gasoline Particulate Filter at Low Environment Temperatures
    DOI：10.13949/j.cnki.nrjgc.2022.03.013
    Key Words:gasoline particulate filter（GPF）  on-board diagnosis（OBD）  deltapressure model  removal of fault
    Author NameAffiliationE-mail
    FU Yumin* China Research Academy of Environmental Sciences，Beijing 100012， China fuym@vecc.org.cn 
    QIAN Liyun* China Research Academy of Environmental Sciences，Beijing 100012， China qly_peter@vecc.org.cn 
    WANG Hongli China Research Academy of Environmental Sciences，Beijing 100012， China  
    ZHAO Haiguang China Research Academy of Environmental Sciences，Beijing 100012， China  
    WEI Chongming Shanghai Branch， Peugeot Citroen （China） Automotive Trade Co.， Ltd.， Shanghai 200233， China  
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    Abstract:The diagnostic requirements of gasoline particulate filter（GPF） for light-duty vehicles at low-temperature environment was investigated and the feasibility of fulfilling these requirements was verified. Tests were carried out at variable environment temperatures ranging from -30 ℃ to -10 ℃. And the temperature and pressure signal data at both ends of GPF were collected after the engine was started under these temperatures. The results showed that the temperature and pressure sensors worked normally even at -30 ℃. Moreover， the temperature and pressure at both ends of GPF had similar variation tendencies with that under normal temperatures. Whether GPF was removed or damaged could be detected at low-temperature conditions.
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