The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2005
Filed:
Mar. 10, 2004
Unheated planar sensor element for determining the concentration of a gas component in a gas mixture
Helmut Weyl, Schwieberdingen, DE;
Jens Schneider, La Primaube, FR;
Detlef Heimann, Gerlingen, DE;
Thomas Wahl, Pforzheim, DE;
Hans-joerg Renz, Leinfelden-Echterdingen, DE;
Norman Hahn, Anderson, SC (US);
James Richard Waldrop, Ii, Belton, SC (US);
Damien Barnes, Anderson, SC (US);
Mike Mccormick, Anderson, SC (US);
John Day, Greenville, SC (US);
Helmut Weyl, Schwieberdingen, DE;
Jens Schneider, La Primaube, FR;
Detlef Heimann, Gerlingen, DE;
Thomas Wahl, Pforzheim, DE;
Hans-Joerg Renz, Leinfelden-Echterdingen, DE;
Norman Hahn, Anderson, SC (US);
James Richard Waldrop, II, Belton, SC (US);
Damien Barnes, Anderson, SC (US);
Mike McCormick, Anderson, SC (US);
John Day, Greenville, SC (US);
Robert Bosch GmbH, Stuttgart, DE;
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.