发明申请
US20130199283A1 METHOD AND DEVICE FOR DIAGNOSING DEVIATIONS IN A SINGLE CYLINDER LAMBDA CONTROL
有权
用于诊断单缸液压马达控制中的偏差的方法和装置
- 专利标题: METHOD AND DEVICE FOR DIAGNOSING DEVIATIONS IN A SINGLE CYLINDER LAMBDA CONTROL
- 专利标题(中): 用于诊断单缸液压马达控制中的偏差的方法和装置
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申请号: US13514712申请日: 2010-11-05
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公开(公告)号: US20130199283A1公开(公告)日: 2013-08-08
- 发明人: Lu Chen , Eberhard Schnaibel , Andreas Koring , Richard Hoeberg , Michael Fey
- 申请人: Lu Chen , Eberhard Schnaibel , Andreas Koring , Richard Hoeberg , Michael Fey
- 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
- 优先权: DE102009047648.2 20091208
- 国际申请: PCT/EP2010/066930 WO 20101105
- 主分类号: F02D41/14
- IPC分类号: F02D41/14
摘要:
The invention relates to a method and device for diagnosing deviations in a single cylinder lambda control in an internal combustion engine having at least two cylinders and an exhaust gas sensor designed as a broadband lambda sensor, wherein a pump current is evaluated by means of a pump cell and said pump current is used at least temporarily for an individual cylinder lambda control. According to the invention, a pump voltage or a pump voltage change is determined via the pump cell in addition to the pump current and said value is transmitted to a diagnosis apparatus. Deviations in the single cylinder lambda control can thus be better diagnosed without additional material expense according to the invention, which provides advantages in particular in respect of tightened rulemaking in on-board diagnosis. A preferred application of the method is the use in internal combustion engines having multi-bank exhaust systems.