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:
May. 29, 2018
Filed:
Jun. 10, 2011
Claudius Bevot, Stuttgart, DE;
Helge Schichlein, Stuttgart, DE;
Claudius Bevot, Stuttgart, DE;
Helge Schichlein, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a circuit assembly for operating a probe () for determining the oxygen concentration in a gas mixture, in particular a Lambda probe for determining the oxygen concentration in the exhaust gas of internal combustion engines, comprising two electrodes () which act as an outer and an inner pump electrode and form a pump cell, two electrodes which act as a Nernst electrode () and a reference electrode () and form a Nernst cell, and a pump current controller (), which controls a pump current that is applied to the pump cell such that a predeterminable Nernst voltage (U) that can be tapped at the Nernst cell is controlled to a predeterminable value, characterized in that the predeterminable value of the Nernst voltage can be varied.