| 摘要 |
The invention relates to the internal exhaust-gas recirculation in an internal combustion engine with gas exchange valves periodically controlled by a camshaft ( 22 ) in accordance with the four-stroke principle, in which, during the gas exchange exhausting of exhaust gas from the respective cylinder ( 1 ) into the exhaust duct ( 5 ), an intake valve ( 2 ) associated with the respective cylinder ( 1 ) is open in a crank angle range after top dead center of the ignition of the gas mixture present in the cylinder ( 1 ), in order to exhaust part of the exhaust gas into an intake duct ( 3 ), so that during the next gas exchange intake both fresh gas and exhaust gas are taken in from the intake duct ( 3 ), the respective intake valve ( 2 ) being actuated during the gas exchange exhausting independently of the periodic gas exchange intake, and the additional opening of the respective intake valve ( 2 ) being carried out in the range from 110 to 150% of the opening angle of the start of opening of the exhaust duct ( 5 ) by the exhaust valve ( 4 ).
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