Data storing exhaust gas probe

Patent metadata

Field	Value
Publication number	US-9234869-B2
Application number	US-201013395563-A
Country	US
Kind code	B2
Filing date	Jul 27, 2010
Priority date	Sep 11, 2009
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

The invention relates to an exhaust gas probe ( 120 ) for measuring properties of the exhaust gas of internal combustion engines, wherein at least one data storage unit ( 135 ) is arranged in a circuit associated with the probe, in particular arranged in a probe plug ( 130 ) or a connecting element associated therewith. The following properties and/or adaption functions characterizing the probe ( 120 ) are stored or storable in said data storage unit: —fluctuations of heating resistances that are due to the production process and/or—parameters that characterize the aging of the probe ( 120 ), and/or—the shut-off state, in particular data that characterize the execution of an interval measurement for regenerating the exhaust gas probe or of a delayed shut-off and/or—data for adapting the probe ( 120 ) to different control devices ( 140 ) of internal combustion engines and/or—the number of operating hours of the probe and/or—the operating parameters of the probe in a previous specifiable time period.

First claim

The invention claimed is:

1. An exhaust gas probe ( 120 ) for measuring properties of the exhaust gas of internal combustion engines, at least one data memory unit ( 135 ) arranged in a circuit associated with the probe, in which data memory unit a value representing a fluctuation in probe heater resistance due to manufacturing is stored along with one or more of the following properties and/or adaptation functions which characterize the probe ( 120 ) are stored:
parameters indicative of ageing of the probe ( 120 ),
an indication of an off state,
data for adapting the probe ( 120 ) to different control units ( 140 ) of internal combustion engines, and
a number indicative of operating hours of the probe.

2. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the data stored in the data memory unit ( 135 ) are communicated in digital form to the control unit ( 140 ).

3. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that operating parameters of the probe, which are measurable within a specifiable previous period, are stored in the data memory unit ( 135 ).

4. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the circuit is arranged in a probe plug ( 130 ).

5. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the circuit is arranged in a connecting element corresponding to the probe.

6. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the off state characterizes the execution of an interval measurement for regenerating the exhaust gas probe.

7. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the off state characterizes the execution of an interval measurement for an after-run.

8. The exhaust gas probe ( 120 ) as claimed in claim 1 , characterized in that the properties and/or adaptation functions characterizing the probe ( 120 ) include a characteristic library and at least one ageing factor characterizing ageing of the probe ( 120 ).

9. The exhaust gas probe ( 120 ) as claimed in claim 8 , characterized in that the at least one ageing factor includes temperature-influenced ageing and poisoning-influenced ageing of the probe ( 120 ).

10. The exhaust gas probe ( 120 ) as claimed in claim 9 , characterized in that temperature-influenced ageing includes one or more of the following variables:
heater operating time;
heater operating capacity; and
a time at which the exhaust gas probe has exceeded at least one specifiable threshold temperature.

11. The exhaust gas probe ( 120 ) as claimed in claim 9 , characterized in that poisoning-influenced ageing includes one or more of the following variables:
a period for which the internal combustion engine ( 100 ) is switched on;
a period for which the probe ( 120 ) is exposed to lean or rich gas; and
a number of regeneration cycles of the exhaust gas system.

12. A method of operating an exhaust gas probe ( 120 ) for measuring properties of an exhaust gas of internal combustion engines, characterized in that is stored in at least one data memory unit ( 135 ) associated with the probe ( 120 ) along with at least one of the following properties and/or adaptation functions which characterize the probe ( 120 ):
a value representing a fluctuation in probe heater resistance due to manufacturing,
parameters indicative of ageing of the probe ( 120 ),
an indication of an off state,
data for adapting the probe ( 120 ) to different control units ( 140 ) of internal combustion engines, and
a number indicative of operating hours of the probe.

13. The method as claimed in claim 12 , characterized in that the off state characterizes the execution of an interval measurement for regenerating the exhaust gas probe.

14. The method as claimed in claim 12 , characterized in that the off state characterizes the execution of an interval measurement for an after-run.

15. The method as claimed in claim 12 , characterized in that an exhaust gas probe ( 120 ) having the data memory unit ( 135 ) arranged in a circuit associated with the probe is used.

16. The method as claimed in claim 15 , characterized in that the circuit is arranged in a probe plug ( 130 ).

17. The method as claimed in claim 15 , characterized in that the circuit is arranged in a connecting element corresponding to the probe.

Assignees

• Schneider Jens
• Stanglmeier Frank
• Rosenland Marc
• Diehl Lothar
• Bosch Gmbh Robert

Inventors

• Schneider Jens
• Stanglmeier Frank
• Rosenland Marc
• Diehl Lothar

Classifications

• F02D41/1454

  the characteristics being an oxygen content or concentration or the air-fuel ratio · CPC title

• F02D41/2451

  characterised by what is learned or calibrated · CPC title

• F02D41/2435

  characterised by the writing medium, e.g. bar code · CPC title

• F02D41/1494

  Control of sensor heater · CPC title

• G01N27/4065 Primary

  Circuit arrangements specially adapted therefor · CPC title