| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a system in which ventilation of blow-by gas can be performed during supercharging operation, and controlability of low-pressure loop EGR is not worsened. <P>SOLUTION: In an internal combustion engine 0 including an external EGR passage 2 for connecting downstream side of a turbine 52 in an exhaust passage 4 and upstream side of a compressor 51 in an intake passage 3, and an intake throttle valve 35 provided on the upstream side of compressor 51 in the intake passage 3, it is configured such that a crank chamber 7 where blow-by gas is accumulated and the upstream side of the compressor 51 are connected via a blow-by gas exhaust passage 62, and the intake throttle valve 35 is located between connection area of the external EGR passage 2 in the intake passage 3 and connection area of the blow-by gas exhaust passage 62. The influence of pulsation of the blow-by gas on EGR rate is reduced by separating an area into which the blow-by gas flows and an area into which the EGR gas is refluxed by the intake throttle valve 35. <P>COPYRIGHT: (C)2012,JPO&INPIT |
