| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a blowby gas returning device using a simple structure capable of separating oil from blowby gas flowing from a crank case through an intake passage at an upstream side of a throttle valve. <P>SOLUTION: The blowby gas returning device includes a throttle valve 40 for controlling a flow rate of air flowing through the intake passage 30, air introduction passages 37a, 37b for introducing the air from the intake passage 30 to the crank case 20, a blowby gas returning passage 38 for returning the air introduced from the air introducing passages 37a, 37b to the crank case 20 and the blowby gas leaked from a combustion chamber 2 into the crank case 20 to an intake passage 30b at a downstream side of the throttle valve 40 from the crank case 20, an oil separator 70a capable of separating the oil from the blowby gas reversely flowing to the intake passage 30a in the air introduction passage 37a and an operation switch means 100 for switching the oil separator 70a between an operation state and a non-operation state. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
