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:
May. 23, 1989
Filed:
Nov. 20, 1987
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention is directed to a method for compensating for the tank venting error in a learning fuel metering system metering the required fuel quantity to an internal combustion engine. The method includes carrying out the lambda correction with adaptively learned precontrol values also in phases of the tank venting so that the disturbing quantities which are introduced by the tank venting can likewise be learned out; however, the obtained learn values are entered in separate memory locations dependent upon whether they have been determined during the basic adaptation or during the adaptation with tank venting. These learn values are switched to the lambda control as precontrol corrective values in accordance with the time control determining the sequence of the base adaptation phases and tank venting adaptation phases. The invention is also directed to an apparatus for carrying out the steps of the method of the invention.