| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blow-by gas reduction device capable of performing satisfactory ventilation in a crank case in an entire operation range. <P>SOLUTION: The blow-by gas reduction device 1 of an engine 3 with a supercharger is provided with a blow-by gas reduction passage 4 which includes a first blow-by gas reduction passage 41 and a second blow-by gas reduction passage 42. The first blow-by gas reduction passage 41 is configured so that the inlet of the passage is connected to a cylinder block 31 or a head cover 32 and the outlet of the passage is connected to an intake bypass passage 23 which connects the upstream side and the downstream side of the supercharger 21 in the intake passage 2. The first blow-by gas reduction passage 41 or the intake bypass passage 23 is provided with a first backflow preventing means 24 which inhibits inflow from the first blow-by gas reduction passage 41. The second blow-by gas reduction passage is configured so that the outlet of the passage 42 is connected to the intake passage 2 on the down stream of a throttle valve 22. <P>COPYRIGHT: (C)2013,JPO&INPIT |
