| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blowby gas reducing device for an internal combustion engine which can suppress the deterioration of fuel economy at high altitude. Ž<P>SOLUTION: The blowby gas reducing device 60 comprises an electronic control type PCV valve 63 for adjusting a flow rate of blowby gas flowing from a crankcase 22 to an intake passage 49 containing a throttle valve 45, and an electronic control device 70 for controlling an opening of the PCV valve 63. The electronic control device 70 is set to reduce the opening of the PCV valve 63 with respect to an opening of the throttle valve 45 as the atmospheric pressure decreases under an idling state while controlling the opening of the PCV valve 63 on the basis of the atmospheric pressure. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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