发明名称 |
Air flow meter with reduced error due to backflow |
摘要 |
<p>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). <IMAGE></p> |
申请公布号 |
EP1302756(A2) |
申请公布日期 |
2003.04.16 |
申请号 |
EP20020022997 |
申请日期 |
2002.10.15 |
申请人 |
HITACHI, LTD. |
发明人 |
KANKE, ATSUSHI;SAKURAI, KOHEI;HOSHINO, MASATOSHI;KANEKAWA, NOBUYASU |
分类号 |
F02M35/10;F02D9/02;F02D35/00;F02D41/22;F02D45/00;G01F1/684;G01F1/698;G01F15/04;(IPC1-7):G01F1/684;F02D41/18;G01F1/696 |
主分类号 |
F02M35/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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