发明名称 |
Throttle valve opened amount calculator |
摘要 |
A calculator for calculating an opened amount of a throttle valve with high accuracy regardless of voltage fluctuation and noise. The calculator includes a valve sensor for detecting the opened amount of the throttle valve to generate a detection voltage. A memory stores an initial zero point detection value. A calculation circuit obtains the difference between the detection voltage and the initial zero point detection value and calculates the opened amount of the throttle valve with the difference. When a plurality of detection voltages that are less than the initial zero point detection value are generated, the calculation circuit calculates a new zero point detection value that is greater than a smallest one of the plurality of detection voltages by a predetermined value and updates the initial zero point detection value with the new zero point detection value.
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申请公布号 |
US2003083800(A1) |
申请公布日期 |
2003.05.01 |
申请号 |
US20020284147 |
申请日期 |
2002.10.31 |
申请人 |
TOYODA KOKI KABUSHIKI KAISHA |
发明人 |
WAKAO HISAAKI;MORI YUTAKA |
分类号 |
G01B21/22;F02D11/10;F02D45/00;(IPC1-7):G06G7/70 |
主分类号 |
G01B21/22 |
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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