| 54 |
Title |
TI |
[DE] Sensor zur Bestimmung der Konzentration von Schwefelverbindungen in einer Flüssigkeit
[EN] Probe for measuring sulfur content in fuel or engine exhaust has membrane separating working electrode from reference electrode on reference material |
| 71/73 |
Applicant/owner |
PA |
DaimlerChrysler AG, 70567 Stuttgart, DE
|
| 72 |
Inventor |
IN |
Hürland, Armin, Dipl.-Min., 88048 Friedrichshafen, DE
;
Kemmler, Roland, Dipl.-Ing., 70619 Stuttgart, DE
;
Moos, Ralf, Dr., 88048 Friedrichshafen, DE
;
Plog, Carsten, Dr.rer.nat., 88677 Markdorf, DE
;
Stengel, Thomas, Dipl.-Ing. (FH), 88045 Friedrichshafen, DE
;
Voigtländer, Dirk, Dr.-Ing., 70825 Korntal-Münchingen, DE
|
| 22/96 |
Application date |
AD |
Sep 16, 2000 |
| 21 |
Application number |
AN |
10045939 |
|
Country of application |
AC |
DE |
|
Publication date |
PUB |
Mar 28, 2002 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
G01N 27/403
|
| 51 |
IPC secondary class |
ICS |
F01N 9/00
F02D 35/00
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
B01D 53/9495
G01N 27/4166
G01N 33/287
|
|
MCD main class |
MCM |
|
|
MCD secondary class |
MCS |
B01D 53/94
(2006.01)
G01N 27/49
(2006.01)
G01N 33/28
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[DE] Die Erfindung betrifft einen Sensor (2) zur Bestimmung der Konzentration von Schwefelverbindungen in einer Flüssigkeit. Er umfasst: DOLLAR A - eine mit der zu analysierenden Flüssigkeit in Kontakt stehende Arbeitselektrode (10); DOLLAR A - eine von der zu analysierenden Flüssigkeit isolierte Referenzelektrode (6); DOLLAR A - eine zwischen der Arbeitselektrode (10) und der Referenzelektrode (6) befindliche flüssigkeitsundurchlässige Membran (4), die für ein Ion, das mit den Schwefelverbindungen in der zu analysierenden Flüssigkeit eine chemische Verbindung eingehen kann, durchlässig ist; DOLLAR A - ein Referenzmaterial (6), das mit der Referenzelektrode (6) in Kontakt steht oder diese bildet.
[EN] A probe has a working electrode (10) contacting a liquid to be analyzed, a reference electrode (6) isolated from the liquid and a liquid impermeable membrane (4) between them. A reference material contacts or forms the reference electrode. Ions that can chemically react with sulfur compounds in the liquid can pass through the electrode Independent claims are included for the following: (a) Apparatus has probes as above both upstream and downstream of an adsorber in a fuel line Comparison of the signals from the probes measures the level of sulfur in the adsorber. (b) Apparatus has probes upstream and downstream of an adsorber in a fuel line. A reference electrode of the downstream probe contacts the untreated fuel upstream of the adsorber. (c) Apparatus has a probe as above measuring the level of sulfur in an adsorber in a fuel line. The working electrode contacts the fuel upstream of the adsorber and the reference electrode contacts the fuel downstream of the adsorber. (d) Use of the above probe to determine the amount of sulfur in a NOx trap in an engine exhaust purification system. The engine is a petrol engine using a lean mixture. Preferred Features: The reference electrode is made from an ion that can be oxidized and can permeate the membrane. The reference material is a liquid with a specified sulfur concentration. The membrane is impermeable to fuels, e.g. petrol, diesel, heating oil, liquefied fuel gas, methanol and ethanol. A third electrode is on the membrane and a voltage is connected across it and the working electrode. |
| 56 |
Cited documents identified in the search |
CT |
DE000019813654A1
EP000000858837A2
EP000000860595A1
EP000000899430A2
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
F01N 9/00 U
F01N 9/00
G01N 27/403
|
