Patent ID: 6705300
Filing Date: 2004-03-16
Classification: F02B,F02D,Y02T

Abstract:
A method for open-loop and closed-loop control of a number and sequence of strokes in a motive process of a reciprocating-piston internal combustion engine, at least in phases in which an air ratio is greater than 1, comprising the steps of:a) inducing fresh air into a combustion chamber after a prior opening of at least one inlet valve; b) compressing the fresh air drawn in; c) injecting fuel directly into the air to form a fuel/air mixture; d) igniting the fuel/air mixture by one of applied and compression ignition followed by subsequently expanding the fuel/air mixture; e) compressing one of a completely and a partially burned charge that remains completely in the combustion chamber; f) injecting fuel into the combustion chamber as a charge; g) igniting the charge by one of applied- and compression ignition and subsequent expansion of the charge; h) expelling the charge from the combustion chamber after prior opening of at least one exhaust valve in accordance with and for as long as one of unburned oxygen being in the combustion chamber and an air ratio falling below a lower limiting value; and i) repeating steps e, f, g and h.