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:
Dec. 31, 1991
Filed:
Feb. 11, 1991
Robert Bosch GmbH, Stuttgart, DE;
Abstract
With a process and an apparatus for cold-start control in an electronic internal combustion engine system, the combustion chambers of the internal combustion engine are supplied, during starting, with the increased fuel feed. The fuel feed per an ignition interval (TD.sub.n) is effected by a plurality of short cold-start injection pulses generated at increased frequency at linear time intervals with respect to one another in respective ignition intervals. This frequency control replaces the normal formation of fuel injection pulses corresponding to half-periods of crankshaft rotation, during starting, and is cancelled upon commencement of preset fuel reduction thresholds. Owing to the fuel atomisation attained, there results a spontaneously ignitable mixture, so that a cold start is still possible even at extremely cold temperatures.