发明授权
- 专利标题: Process, use of the same and apparatus for lambda value detection
- 专利标题(中): 过程,使用它们和设备用于木材价值检测
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申请号: US466264申请日: 1990-02-20
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公开(公告)号: US5140535A公开(公告)日: 1992-08-18
- 发明人: Lothar Raff , Eberhard Schnaibel , Michael Westerdorf
- 申请人: Lothar Raff , Eberhard Schnaibel , Michael Westerdorf
- 申请人地址: DEX 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: DEX Stuttgart
- 优先权: DEX3727573 19870819
- 主分类号: G01N27/409
- IPC分类号: G01N27/409 ; F02D41/14 ; G01N27/406
摘要:
In a method for lambda value detection, the voltages of the loaded and the unloaded lambda sensor are detected and the internal resistance of the sensor is calculated from these values with the aid of the known value of the load resistance. The value of the internal resistance and the respective value of the voltage of the sensor in the unloaded state serve as input variables for a characteristic field, in which lambda values dependent on values of the internal resistance and of the voltage of the sensor in the unloaded state are stored. The method of the invention affords the advantage that lambda values can be measured very accurately even in the strongly temperature-dependent rich branch of a sensor, for example, of a sensor of the Nernst type. The values thus detected can be indicated by a measuring device or they can be used for exhaust gas control, for example in warming-up or at full load.
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