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:
Feb. 25, 1986
Filed:
Feb. 10, 1984
Gunter Honig, Ditzingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention is directed to a method and an apparatus for measuring the air-flow rate in the intake tube of an internal combustion engine using a flow-measuring device which is insensitive to the direction of flow. In order to avoid incorrect measuring results when pulsations of the air flow occur, the reverse flow is sensed and, based on a total flow signal, deducted to determine the forward flow. At the points where the direction of flow is reversed, certain physical relationships prevail between flow-measuring signal, differential pressures, the presence of maxima and minima in the flow signal and the gradient of the flow signal. Several methods are disclosed to determine these reversal points as are flow charts for a computer-controlled determination of the air-flow rate.