Title:
ラムダプローブを動作させるための方法
Document Type and Number:
Japanese Patent JP7223158
Kind Code:
B2
Abstract:
The invention relates to a method for operating a broadband lambda probe which has a measuring space which communicates with a measuring gas and which has an electrochemical pump cell with which oxygen can be transported into the measuring space and out of the measuring space according to the total pump voltage (Up) which is present at said pump cell and according to a pump current (Ip) which results therefrom, and which has an electrochemical Nernst cell at which the Nernst voltage (Un) is formed according to the ratio of the oxygen content in the measuring space relative to the oxygen content in a reference space of the broadband probe, wherein the method provides a control loop whose actual value is the Nernst voltage (Un), whose setpoint value is a predefined value (UnSet) and whose manipulated variable is the pump current (Ip), wherein in order to protect the pump cell the manipulated variable of the pump current (Ip) is subjected to limitation by another limiting value (LL) and/or by a lower limiting value(LR) by means of a further effective loop, wherein the upper limiting value (LL) and/or the lower limiting value (LR) are each determined in a variable fashion in accordance with the pump current (Ip), the pump voltage (Up) and the internal resistance (R) of the pump cell.
Inventors:
Rüdiger Ferman
Claudius Bevot
Bearn Heart Radarman
Torsten Treffon
Thomas schulz
Claudius Bevot
Bearn Heart Radarman
Torsten Treffon
Thomas schulz
Application Number:
JP2021552679A
Publication Date:
February 15, 2023
Filing Date:
March 02, 2020
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
G01N27/419
Domestic Patent References:
| JP2019020126A | ||||
| JP2016090462A |
Foreign References:
| US4665874 |
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Taku Morita
Junichi Maekawa
Hideo Nagashima
Ueshima class
Taku Morita
Junichi Maekawa
Hideo Nagashima
Ueshima class