Invention Grant
- Patent Title: Method of operating a spark ignition internal combustion engine
- Patent Title (中): 操作火花点火式内燃机的方法
-
Application No.: US12075791Application Date: 2008-03-13
-
Publication No.: US07654245B2Publication Date: 2010-02-02
- Inventor: Bernd Kohler , Christoph Lux , Michael Oechsle , Matthias Werner
- Applicant: Bernd Kohler , Christoph Lux , Michael Oechsle , Matthias Werner
- Applicant Address: DE Stuttgart
- Assignee: Daimler AG
- Current Assignee: Daimler AG
- Current Assignee Address: DE Stuttgart
- Agent Klaus J. Bach
- Priority: DE102005044544 20050917; DE102005053199 20051108
- Main IPC: F02B3/02
- IPC: F02B3/02 ; F02B3/00

Abstract:
In a method for operating a spark-ignition, direct-injection internal combustion engine, wherein fuel is injected into a cylinder of the internal combustion engine and is ignited by a spark plug as a function of at least the load of the internal combustion engine, a crank angle is determined at which a first amount of fuel is injected into the cylinder during the intake stroke whereby a lean mixture is formed in the cylinder, subsequently, as a function of at least the load of the internal combustion engine, a crank angle is determined at which a second amount of fuel is injected, whereby a mixture cloud, which is richer than the lean mixture is formed in the lean mixture and a third amount of fuel is injected in the form of a stratified injection for forming a locally enriched and ignitable fuel/air mixture in the region of the spark plug close to an ignition time which is then ignited by the spark plug causing also combustion of the mixture cloud and the lean mixture.
Public/Granted literature
- US20080228378A1 Method of operating a spark ignition internal combustion engine Public/Granted day:2008-09-18
Information query