Title:
センサ・エレメントの機能可能性の検査装置
Document Type and Number:
Japanese Patent JP5069796
Kind Code:
B2
Abstract:
The invention relates to a device for checking the operability of a sensor element (100) for determining the concentration of gas components in a gas mixture, particularly of the concentration of gas components in the exhaust gas of internal combustion engine, having an external pump electrode (APE) and an internal pump and Nernst electrode (IPE), a measurement resistor (Rm) and a balancing resistor (Rtrim) connected parallel thereto being provided upstream of the external pump electrode (APE), and a pump current (Ip) being impressible into the external pump electrode by means of a pump current source, and a measuring voltage (Um) incident across the measuring resistor (Rm) via a measuring and analysis device (200) being detectable, characterized in that an activatable switch means (S) is disposed in series to the measuring resistor (Rm), which can be switched at a high impedance for a predetermined amount of time, during which the voltage across the measuring resistor is detected and analyzed in the measuring and analysis device, and that an error output occurs upon a predetermined voltage threshold value being exceeded.
Inventors:
Befott, Claudias
Luders, Uwe
Luders, Uwe
Application Number:
JP2010532610A
Publication Date:
November 07, 2012
Filing Date:
November 07, 2008
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
G01N27/419
Domestic Patent References:
| JP2005504283A | ||||
| JP2004125738A | ||||
| JP2003166966A | ||||
| JP9061397A | ||||
| JP5107299A | ||||
| JP2012049A | ||||
| JP53157795U |
Foreign References:
| WO2006024556A1 |
Attorney, Agent or Firm:
Shinjiro Ono
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Takuto Tanaka
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Takuto Tanaka