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:
Apr. 10, 2018
Filed:
Sep. 22, 2014
Husqvarna Ab, Huskvarna, SE;
Johan Assargård, Jönköping, SE;
Ricky Sundkvist, Granna, SE;
Stefan Wixe, Huskvarna, SE;
Martin Axelsson, Hestra, SE;
HUSQVARNA AB, Huskvarna, SE;
Abstract
An internal combustion engine () may include a combustion chamber () into which a mixture () of fuel and air is supplied, a spark plug () disposed proximate to the combustion chamber () to ignite the mixture () by generating a spark such that ignition of the mixture drives a piston () operably coupled to a crank portion () of the engine (), a speed sensor () configured to determine engine speed, and an electronic control unit () configured to control operation of the spark plug (). The electronic control unit () may be configured to initiate a speed limitation operation in response to engine speed reaching a cut out speed threshold and to control ignition timing within an operating band () of ignition angles prior to engine speed reaching the cut out speed threshold. The speed limitation operation may include skipping application of sparks. The electronic control unit () is further configured to apply a changed ignition angle () relative to the operating band () for first at least one spark initiated after the speed limitation operation.