Patent ID: 7249597

Claim:
A method for internal exhaust-gas recirculation in an internal combustion engine with gas exchange valves periodically controlled by a camshaft in accordance with the four-stroke principle, in which method, during the gas exchange exhausting of exhaust gas from the respective cylinder into the exhaust duct by opening the exhaust valve, an intake valve associated with the respective cylinder is additionally opened in a crank angle range after top dead center of the ignition of the gas mixture present in the cylinder, in order to exhaust part of the exhaust gas into an intake duct, so that during the next gas exchange intake both fresh gas and exhaust gas are taken in from the intake duct, the respective intake valve being actuated during the gas exchange exhausting in addition to the periodic gas exchange intake, characterized in that the start of additional opening of the respective intake valve is carried out in the range from 110 to 150% of the opening angle of the start of opening of the exhaust duct by the exhaust valve.