Electricity: measuring and testing – Using ionization effects – For analysis of gas – vapor – or particles of matter
Reexamination Certificate
2005-09-06
2005-09-06
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Using ionization effects
For analysis of gas, vapor, or particles of matter
C204S426000, C204S431000
Reexamination Certificate
active
06940287
ABSTRACT:
An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.
REFERENCES:
patent: 6222372 (2001-04-01), Fukaya et al.
patent: 2001/0047939 (2001-12-01), Springhorn
patent: 2003/0047452 (2003-03-01), Jain et al.
patent: 199 41 051 (2001-03-01), None
Wiedenmann, Hötzel, Neumann, Riegel, Weyl Zr02Lambda Sensors For The Mixture Control In The Motor Vehicle, B.G. Teubner Stuttgart, 1995, pp. 383 and 384, month not available.
Chapter 6, “Exhaust Gas Sensors” of the Automotive Electronics Handbook, ¶6.3.3, date not available.
Barnes Damien
Day John
Hahn Norman
Heimann Detlef
McCormick Mike
Deb Anjan
He Amy
Kenyon & Kenyon
Robert & Bosch GmbH
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