发明公开
- 专利标题： Air flow meter with reduced error due to backflow
- 专利标题（中）： 空气流量计由于回流而减少了误差
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申请号： EP02022997.7申请日： 2002-10-15
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公开(公告)号： EP1302756A2公开(公告)日： 2003-04-16
- 发明人: Kanke, Atsushi , Sakurai, Kohei , Hoshino, Masatoshi , Kanekawa, Nobuyasu
- 申请人： Hitachi, Ltd.
- 申请人地址： 6 Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 101-8010 JP
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： 6 Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 101-8010 JP
- 代理机构： Beetz & Partner Patentanwälte
- 优先权： JP2001318444 20011016
- 主分类号： G01F1/684
- IPC分类号： G01F1/684 ; G01F1/696
摘要：
The invention relates to an air flow meter which can decrease the error due to the backflow. Throttle valve (17) which opens and shuts the air intake passage (19) is installed in the air intake passage (19) of the internal combustion engine (1). The first sensor part (161) is installed in the air intake passage (19) in the upstream of throttle valve (17). Further, the second sensor part (141) is installed-in the air intake passage (19) in the downstream of throttle valve (17). Pulsation compensating means (671) corrects the pulsation of the air flowrate signal detected by the first sensor part (161) by using the output signals of the first and the second sensor parts (161, 141) based on each cylinder of the internal combustion engine (1).
公开/授权文献
- EP1302756A3 Air flow meter with reduced error due to backflow 公开/授权日：2003-11-19
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