发明授权
- 专利标题： Diagnostic apparatus and method for fuel vapor treating apparatus
- 专利标题（中）： 燃油蒸气处理装置的诊断装置及方法
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申请号： US257311申请日： 1999-02-25
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公开(公告)号： US06131448A公开(公告)日： 2000-10-17
- 发明人: Yoshihiko Hyodo , Naoya Takagi
- 申请人： Yoshihiko Hyodo , Naoya Takagi
- 申请人地址： JPX Toyota
- 专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址： JPX Toyota
- 优先权： JPX10-052240 19980304
- 主分类号： F02D41/02
- IPC分类号： F02D41/02 ; F02M25/08 ; G01M15/04 ; G01M15/00
摘要：
A diagnostic apparatus for a fuel vapor treating apparatus closes a breather to shut a purge system valve during purge. While further continuing the purge, the apparatus detects the purge flow thereby caused and a pressure change occurring in the purge system. Based on the purge flow and the pressure change, the space volume in the purge system is estimated. By comparing the estimated space volume and the actual space volume in the purge system, the apparatus determines whether there is a failure or fault in the purge system.
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