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:
Oct. 26, 1993
Filed:
Dec. 12, 1991
Jurgen Pischke, Weissach, DE;
Herbert Arnold, Eberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention is directed to a method for operating control apparatus during delayed shutoff after switching off the ignition of an internal combustion engine. This method protects the battery as far as possible and for this method, three principles are applied individually or in any desired combination but preferably all together. The first principle provides that the delayed-shutoff functions are no longer carried out, as has been conventional, until a fixed pregiven time duration is reached; instead, the functions are either interrupted when values of special variables reach a fixed pregiven threshold or a threshold fixed in dependence upon operating variables in advance of switch-off of the engine is reached. The particular monitored physical variable and the threshold value corresponding thereto are each so selected that, when the actual value reaches the threshold value and accordingly, the delayed-shutoff function is interrupted or not even started, this occurs without essentially influencing the new start capacity of the engine. The second principle provides that delayed-shutoff functions, and especially those which require a high current flow, are not carried out simultaneously but instead sequentially. The third principle provides that the current-supplying capacity of the battery is monitored and as soon as it becomes apparent that this current-supplying capacity is just sufficient for a new start of the cooled-down engine, the delayed-shutoff functions are interrupted or not even begun.