发明名称 |
Thermal flow meter and control system |
摘要 |
In regard to an output of an intake flow meter for an internal combustion engine, a pulsation error can be reduced and dispersion in correction at the time of correction of response delay (a recovering of response delay) is reduced. A digital device is used for pre-processing of a control unit for inputting a flow rate measuring signal. An output voltage of the flow sensor is converted into a digital value, the digital value is converted into a flow rate and adds a response delay. The control unit detects a degree of response delay in reference to dispersion in a clock signal so as to perform response delay recovering and reduce dispersion of the response delay.
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申请公布号 |
US7565255(B2) |
申请公布日期 |
2009.07.21 |
申请号 |
US20040953608 |
申请日期 |
2004.09.30 |
申请人 |
HITACHI, LTD.;HITACHI CAR ENGINEERING CO., LTD. |
发明人 |
KANKE ATSUSHI;WATANABE IZUMI;HANZAWA KEIJI |
分类号 |
G01F1/12;G01F1/698;G01F1/68;G01F1/684;G01F1/696 |
主分类号 |
G01F1/12 |
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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