发明名称 |
Method and apparatus for recognition of knocking in an internal combustion engine |
摘要 |
Engine knock sensor signals are amplified, band-pass filtered and rectified and then a sequence of integrated signal peak values are compared with reference signals relating to a typical engine knock signal. If the deviation of the integration values or peak values or their sum over a measurement period differs by less than a predetermined amount from the corresponding reference values, a knock indication is produced. The initial integration or peak value may be given less weight than those that follow. The knock sensor may be an engine block sound sensor, or a combustion chamber light, pressure or iron current sensor. Additional criteria, such as the interval between null transitions or signal maxima or the number of them in a measuring period may be used to inhibit a knock indication in case the main processing should occasionally provide an anomalous knock signal, but this precaution is not sufficiently needed to warrant its inclusion in simplified systems.
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申请公布号 |
US4565087(A) |
申请公布日期 |
1986.01.21 |
申请号 |
US19840613152 |
申请日期 |
1984.05.23 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
DAMSON, ECKART;KLENK, MARTIN;MOSER, WINFRIED;MOELLER, HEINZ |
分类号 |
G01H1/00;G01H17/00;G01L23/22;G01M15/00;(IPC1-7):G01L23/22 |
主分类号 |
G01H1/00 |
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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