Patent ID: 7431009
Filing Date: 2008-10-07
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method for operating a four-stroke internal combustion engine, comprising: injecting fuel directly into at least one combustion chamber of the internal combustion engine, the volume of which changes cyclically, supplying fresh gas through at least one intake valve and discharging combustion exhaust gas through at least one exhaust valve, at part-load, forming a lean base mix of air, fuel and retained exhaust gas, and at full load forming a stoichiometric mix, and having compression ignition take place at part-load and spark ignition take place at full load, wherein within the part-load range in the event of a change in load state, the theoretical shift in the combustion position occurring in the at least one combustion chamber during compression ignition is compensated by the shift in phase position of at least one of an intake and exhaust phase.