发明授权
- 专利标题: Method and device for ascertaining a cylinder pressure feature
- 专利标题(中): 确定气缸压力特征的方法和装置
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申请号: US12255495申请日: 2008-10-21
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公开(公告)号: US07703441B2公开(公告)日: 2010-04-27
- 发明人: Jean-Pierre Hathout , Axel Loeffler , Wolfgang Fischer
- 申请人: Jean-Pierre Hathout , Axel Loeffler , Wolfgang Fischer
- 申请人地址: DE Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DE Stuttgart
- 代理机构: Kenyon & Kenyon LLP
- 优先权: DE102007050302 20071022
- 主分类号: F02M7/28
- IPC分类号: F02M7/28
摘要:
A method for determining one or more cylinder pressure features for setting the combustion position in an internal combustion engine includes ascertaining a curve of a cylinder pressure or a curve of a cylinder pressure gradient with respect to a crankshaft angle, filtering the curve of the cylinder pressure or the curve of the cylinder pressure gradient using a filter, in order to eliminate a component of a pressure fluctuation brought about by the piston movement in the combustion chamber, and determining at least one cylinder pressure feature from the filtered curve.
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