发明公开
EP0469658A2 Method of analysing cylinder performance in an internal combustion engine
失效
Verfahren zur Analyze der Zylinderleistung einer Brennkraftmaschine。
- 专利标题： Method of analysing cylinder performance in an internal combustion engine
- 专利标题（中）： Verfahren zur Analyze der Zylinderleistung einer Brennkraftmaschine。
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申请号： EP91201755.5申请日： 1991-07-05
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公开(公告)号： EP0469658A2公开(公告)日： 1992-02-05
- 发明人: Schroeder, Thaddeus , Martabano, Cristi Ann , Evans, Roger Bruce , Dalley, Robert Allen
- 申请人： GENERAL MOTORS CORPORATION , SATURN CORPORATION , ELECTRONIC DATA SYSTEMS CORPORATION
- 申请人地址： General Motors Building 3044 West Grand Boulevard Detroit Michigan 48202 US
- 专利权人： GENERAL MOTORS CORPORATION,SATURN CORPORATION,ELECTRONIC DATA SYSTEMS CORPORATION
- 当前专利权人： GENERAL MOTORS CORPORATION,SATURN CORPORATION,ELECTRONIC DATA SYSTEMS CORPORATION
- 当前专利权人地址： General Motors Building 3044 West Grand Boulevard Detroit Michigan 48202 US
- 代理机构： Denton, Michael John
- 优先权： US559852 19900730
- 主分类号： G01M15/00
- IPC分类号： G01M15/00
摘要：
An engine (10) equipped with a low resolution crankshaft rotation encoder (12) is diagnosed by measuring the average speeds for each encoder period, deriving estimated instantaneous speeds (V-(L) and V(H)) for top dead centre positions of each cylinder and for the points midway between top dead centres. Speed changes calculated from the estimated speeds for the compression and combustion phases of each cylinder provide measures of the compression and power output of each cylinder. An engine speed signature trace (34) derived from the estimated speeds is displayed to reveal speed changes and a composite display of several consecutive signatures provides further information.
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