Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2011-07-12
2011-07-12
Olsen, Kaj K (Department: 1724)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S425000, C072S021500
Reexamination Certificate
active
07976689
ABSTRACT:
The invention relates to a gas sensor for determining the oxygen concentration in a gas mixture, especially in the exhaust gas of internal combustion engines. Said gas sensor comprises a pump cell having an outer pump electrode, exposed to the gas mixture, and an inner pump electrode, exposed to the gas mixture via a diffusion barrier, and a solid electrolyte body interposed between the outer pump electrode and the inner pump electrode. The gas sensor also has a reference electrode, exposed to a reference gas, and a sensor heating device. The outer pump electrode is connected to a circuit arrangement via a pump current line, the inner pump electrode via a measuring line, the reference electrode via a reference current line and the sensor heating device via two heating lines. The invention is characterized in that the pump current line and one heating line are electrically interconnected and grounded, the pump current can be supplied via the measuring line and the Nernst voltage can be tapped between the measuring line and the reference pump current line and the reference pump current flows from the reference electrode to the outer pump electrode.
REFERENCES:
patent: 4787966 (1988-11-01), Nakajima et al.
patent: 5895564 (1999-04-01), Miyata et al.
patent: 5929328 (1999-07-01), Seidenfuss
patent: 5976335 (1999-11-01), Kato et al.
patent: 39 05 298 (1989-09-01), None
patent: 39 17 710 (1990-01-01), None
patent: 102 57 284 (2004-06-01), None
patent: 0 125 069 (1984-11-01), None
patent: 0 281 378 (1988-09-01), None
patent: 0 849 590 (1998-06-01), None
patent: WO 01/27602 (2001-04-01), None
Diehl Lothar
Reinshagen Holger
Scheffel Marcus
Seiler Thomas
Merchant & Gould P.C.
Olsen Kaj K
Robert & Bosch GmbH
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