Patent ID: 9447753
Filing Date: 2016-09-20
CPC Classification: F01M,F02B,F02M,Y02T

Claim Text:
1. A blow-by gas ventilation device applied to an internal combustion engine having an intake passage, wherein a forced-induction device, which compresses intake air, and a bypass passage, which connects a portion at an upstream side and a portion at a downstream side of the forced-induction device, are provided in the intake passage, the blow-by gas ventilation device comprising: an ejector configured to operate by using intake air flowing through the bypass passage as a drive gas to vent blow-by gas generated by the internal combustion engine; and a controller configured to act as a flow rate increasing unit that performs flow rate increasing control for increasing the flow rate of the drive gas when an operation range of the internal combustion engine transitions from a natural aspiration range to a forced induction range, wherein, when in a state where degradation of oil due to the blow-by gas tends to progress, the controller increases the increment of the drive gas flow rate in the flow rate increasing control in comparison to that when not in the state.