Blowby-gas reflux system, blowby-gas reflux-system control device, and recording medium

A control device applied to a blow-by gas reflux system,

• the blow-by gas reflux system comprising:
• a blow-by gas reflux path for causing a blow-by gas discharged from an internal combustion engine to pass through an oil separator, which is configured to remove oil from the blow-by gas, and then refluxing the blow-by gas to an intake passage of the internal combustion engine positioned on a further upstream-side than a compressor of a supercharger disposed on the intake passage;
• and an atmospheric release mechanism disposed at a further downstream-side part of the blow-by gas reflux path than the oil separator and configured to release the blow-by gas after passing through the oil separator into an atmosphere,
• the control device being configured to:
• determine whether oil caulking occurs in the compressor, based on an operating state of the compressor, the oil caulking being caused due to oil contained in the blow-by gas after passing through the oil separator;
• in a case it is determined that the oil caulking does not occur, stop the release of the blow-by gas into the atmosphere performed by the atmospheric release mechanism;
• and
• in a case it is determined that the oil caulking occurs, control the atmospheric release mechanism to release the blow-by gas into the atmosphere.

A non-transitory computer-readable storage medium storing a computer program readable by a computer of a vehicle,

• the vehicle comprising a blow-by gas reflux system comprising:
• a blow-by gas reflux path for causing a blow-by gas discharged from an internal combustion engine to pass through an oil separator configured to remove oil from the blow-by gas and then refluxing the blow-by gas to an intake passage of the internal combustion engine positioned on a further upstream-side than a compressor of a supercharger disposed on the intake passage;
• and an atmospheric release mechanism disposed at a further downstream-side part of the blow-by gas reflux path than the oil separator and configured to release the blow-by gas after passing through the oil separator into an atmosphere,
• the computer program, when executed by the computer, causes the vehicle to perform:
• determining whether oil caulking occurs in the compressor, based on an operating state of the compressor, the oil caulking being caused due to oil contained in the blow-by gas after passing through the oil separator;
• in a case it is determined that the oil caulking does not occur, stopping the release of the blow-by gas into the atmosphere performed by the atmospheric release mechanism;
• and
• in a case it is determined that the oil caulking occurs, causing the atmospheric release mechanism to release the blow-by gas into the atmosphere.