Method for the control of four-stroke piston internal combustion engines

摘要

In a method for the control of four-stroke piston internal combustion engines with load control by means of the amount of fresh mixture in the working chamber and with variable exhaust fraction in the cylinder charge, the amount of fresh mixture is controlled by way of mutually independent inlet and exhaust devices, with a constant flow cross section in the intake and exhaust gas systems outside the inlet and exhaust devices, exclusively by opening and closing times of the inlet and exhaust devices which are matched to one another, in such a way that a certain amount of exhaust gas is present in the cylinder on conclusion of the charge cycle and the remaining cylinder volume for receiving fresh mixture is thereby reduced for the purpose of load control, the exhaust gas and fresh mixture fractions being mixed in the cylinder during the filling and compression process.