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:
Dec. 08, 1981
Filed:
Jun. 08, 1977
Otto Glockler, Renningen, DE;
Bernd Kraus, Gerlingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The fuel-air mixture preparation system of an internal combustion engine is engaged by signals from a plurality of oxygen sensors located in the exhaust system of the engine. More than one sensor is provided to improve the quality of the output signals in unfavorable engine operation. The individual sensors are provided with comparators which make a comparison between the sensor output and a set-point signal. The output signals from the comparators are fed to a logically controlled coupling circuit which presents them in cyclic alternation to an integrating control circuit which provides a control signal to the final control element in the fuel mixture preparation system for changing the fuel-air ratio. The coupling circuit may also provide a signal based on the logical states of the individual sensor signals.