Patent ID: 6105550
Filing Date: 2000-08-22
Classification: F02B,F02D,F02M,Y02T

Abstract:
A method for operation of a four-stroke reciprocating internal combustion engine with a homogeneous lean basic mixture of air, fuel and retained exhaust, the engine being capable of direct fuel injection and compression ignition within a combustion chamber whose volume is cyclically varied, the combustion chamber being: fillable through at least one inlet device with fresh gas; capable of withstanding the combustion of gases; and capable of discharging the combustion exhausts through at least one outlet device, said inlet and outlet device having a variable time cross section, said engine having lower load range, a middle partial load range, a high partial load range, and a full load range, said method comprising the steps of:operating the reciprocating internal combustion engine as a compression ignition engine in the lower and middle partial load range; andoperating the reciprocating internal combustion engine as a spark-ignition engine in the full load and high partial load range.