| 摘要 |
PROBLEM TO BE SOLVED: To provide a blowby gas treatment device which can suppress the stagnation of the discharge of a blowby gas due to the introduction of intake air via the other branch passage when negative pressure is applied from one branch passage.SOLUTION: A blowby gas passage 60 of a blowby gas treatment device 40 comprises a communication passage 41 connected to a crank case 14, and a volume chamber 41 connected to the communication passage 41. The blowby gas passage 60 is branched to a first branch passage 46 connected to a region at a downstream side of a throttle valve 23 in an intake passage 19, and a second branch passage 58 connected to a region at an upstream side of a supercharger 30 in the intake passage 19 with the volume chamber 42 as a branch part. A first oil separator 50 is arranged in the communication passage 41 in the blowby gas passage 60, and a second oil separator 51 larger than the first oil separator 50 in pressure loss is arranged in the second branch passage 58. |
