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:
Jul. 17, 1979
Filed:
Jul. 07, 1977
Reinhard Latsch, Vaihingen, DE;
Valerio Bianchi, Leonberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An electronic control circuit for operating an internal combustion engine near its lean running limit includes means for measuring the scattering bandwidth of the cyclic fluctuations of the combustion chamber pressure. This measurement is made indirectly by measuring the angular speed a rotating engine member, e.g., the crankshaft, and by forming and storing an appropriate analog signal. Circuitry is provided which supplies a nominal value of the scattering bandwidth which is compared electrically with the measured actual value. An appropriately processed difference signal is fed to a fuel injection controller which changes the fuel-air mixture to the desired ratio.