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:
Aug. 28, 2007
Filed:
Aug. 19, 2004
Johan Linderyd, Sundbyberg, SE;
Fredrik Agrell, Älvsjö, SE;
Johan Linderyd, Sundbyberg, SE;
Fredrik Agrell, Älvsjö, SE;
Scania CV AB (Publ), , SE;
Abstract
An arrangement and a method for controlling a combustion engine, e.g. of the type called HCCI engine. A control unit is operable for controlling the self-ignition of the fuel mixture towards an optimum crankshaft angle (cad) within a load range (L). The load range (L) can be divided into at least two subranges (L, L). The control unit is operable to controlling the self-ignition of the fuel mixture towards an optimum crankshaft angle (cad) within one of the subranges (L) by a strategy (II) which entails the effective compression ratio (c) in the cylinder being varied, and within the second subrange (L) by another strategy (III) which entails a variable amount of cooled exhaust gases (ceg) being led to the combustion chamber also enabling in the second subrange (L) to control the self-ignition of the fuel mixture towards an optimum crankshaft angle (cad) by variation of the effective compression ratio (c) in the cylinder without it falling below a lowest acceptable value (C).