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:
Aug. 23, 1977
Filed:
Feb. 19, 1976
Applicant:
Inventor:
Wolf-Dietrich Frobenius, Asperg, DT;
Assignee:
Robert Bosch GmbH, Stuttgart, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; F02D / ;
U.S. Cl.
CPC ...
23515021 ; 123 / ;
Abstract
Engine control based on the smooth or rough running of the engine is performed by obtaining a signal indicative of crankshaft rotation and by digital measurement of the period of revolution. The periods of three successive revolutions are compared to obtain a second differential, related to acceleration and hence to combustion chamber pressure. This second differential is compared digitally to a nominal value, taken from an rpm-dependent function of the engine smoothness, derived by frequency synthesis of the frequencies from individual stages in one or more of the counters.