Patent ID: 7185632
Filing Date: 2007-03-06
Classification: F02D,F02P,Y02T

Abstract:
1. An internal combustion engine comprising: a crankcase; a crankshaft rotatably journalled in said crankcase; a cylinder connected to said crankcase; a piston displaceably mounted in said cylinder for driving said crankshaft; said piston delimiting a combustion chamber wherein an air/fuel mixture is compressed; an ignition device for igniting said air/fuel mixture at an ignition time point (Z); said engine operating at an engine rpm (n) and being operable in a first operating state in accordance with a first characteristic line and in a second operating state in accordance with a second characteristic line; said ignition time point (Z) being determined based on either one of said characteristic lines with said ignition time point (Z) being given by said characteristic lines in dependence upon said engine rpm (n); and, said ignition device including switching means for switching between said first characteristic line and said second characteristic line in dependence upon a characteristic variable of said engine.