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. 18, 1979
Filed:
Jan. 25, 1978
Harro Herth, Schwieberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method and apparatus for adjusting the reference or set-point value which is used in a closed-loop fuel control system for comparison with the actual value signal from an exhaust gas analyzer or sensor. The frequency of amplitude alternations of the sensor signal is a measure of engine speed and gas throughput rate. Accordingly, the invention provides generation of a quasi-D.C. signal whose amplitude is related to the frequency of sensor signal alternations. This signal is then used to change the supply voltage for a voltage-dividing circuit that supplies the reference voltage to the comparator circuit. The invention describes continuous and discrete adjustments of the reference signal.