发明名称 |
KNOCK DETERMINATION APPARATUS AND METHOD FOR ENGINES |
摘要 |
<p>In determining a knock of an engine (11), a vibration intensity is calculated by logarithm-transforming a peak value or an integral value of an output signal of a knock sensor (28). Further, a central value VMED of a vibration intensity distribution is calculated, and also a standard deviation s in a region where the vibration intensity is smaller than this central value VMED is calculated. A vibration intensity reference value VIB is calculated as VMED - u x s, thereby setting the vibration intensity reference value VIB to be close to a minimum of the vibration intensity distribution. Further, a knock reference value KCK is set by adding a predetermined value K to the vibration intensity reference value VIB. The vibration intensity detected by the knock sensor (28) is compared with the knock reference value KCK to determine presence/absence of a knocking.</p> |
申请公布号 |
WO2007032244(A1) |
申请公布日期 |
2007.03.22 |
申请号 |
WO2006JP317713 |
申请日期 |
2006.08.31 |
申请人 |
DENSO CORPORATION;TOYOTA JIDOSHA KABUSHIKI KAISHA;TAKEMURA, YUICHI;KASASHIMA, KENJI;KANEKO, RIHITO |
发明人 |
TAKEMURA, YUICHI;KASASHIMA, KENJI;KANEKO, RIHITO |
分类号 |
G01L23/22;F02D45/00;F02P5/152 |
主分类号 |
G01L23/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|