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. 03, 1984
Filed:
Sep. 14, 1982
Jaihind S Sumal, Vaihingen-Ensingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method is proposed for measuring the pulsating air mass aspirated by an internal combustion engine in a flow cross section. To this end, an upper reference value (U.sub.or) is determined from the rpm of the engine, above which value a reversed flow of the air takes place, and an actual flowthrough measurement value (U.sub.s) furnished by a flowthrough measuring device is compared with this upper reference value (U.sub.or). Upon the attainment of the upper reference value (U.sub.or) by the actual flowthrough measurement value (U.sub.s), a time period (t.sub.r) begins to run, which ends whenever the actual flowthrough measurement value (U.sub.s) has again dropped down to the upper reference value (U.sub.or). The time period (t.sub.r) is stored in memory and serves in such a manner to correct the flowthrough measurement value (U.sub.s) upon the occurrence of reversed flow that the polarity of the actual flowthrough measurement value (U.sub.s) is reversed, at the most for the time period (t.sub.r), whenever the actual flowthrough measurement value (U.sub.s) attains a predetermined lower reference value (U.sub.ur , U.sub.smin).