Patent ID: 7275527

Claim:
A method for venting a crankcase ( 10 ) of an internal combustion engine with an intake line ( 14 ) including a throttle valve ( 15 ), said method comprising the steps of venting the crankcase ( 10 ) in a first operating range under part-load engine operation via a first venting line ( 18 ) which includes a control valve ( 22 ) and which opens out into the intake line ( 14 ) of the internal combustion engine downstream of the throttle valve ( 15 ), venting, in a second operating range under full load, the crankcase ( 10 ) via a second venting line ( 19 ), which opens out into the intake line ( 14 ) upstream of the throttle valve ( 15 ), controlling the volumetric flow through the first venting line ( 18 ) by the control valve ( 22 ) disposed in the first venting line ( 18 ) as a function of relevant characteristic variables, characteristic curves or characteristic diagrams in a range including a complete interruption of the vent flow through the first venting line ( 18 ), and closing the first venting line ( 18 ) when the internal combustion engine ( 10 , 11 ) is operating in an overrun mode ( 32 ).