ENGINE SYSTEM AND CONTROL METHOD FOR ENGINE SYSTEM

摘要

An engine system includes an internal combustion engine, a forced induction device, an ejector device, a blow-by gas passage, and a controller. The ejector device has an ejector and a drive gas passage connected to an intake passage of the engine in a manner bypassing a compressor of the forced induction device. The controller is adapted to execute a temperature raising control when the controller determines that condensate water is likely to freeze in the ejector device. In the temperature raising control, the controller raises intake air pressure in a downstream portion of the intake passage with respect to the compressor compared to when the controller determines that the condensate water is unlikely to freeze and adjusts an intake air amount of the engine to restrain increase of the intake air amount that would be caused by increase in the intake air pressure.

主权项

1. An engine system comprising:
an internal combustion engine; a forced induction device having a compressor arranged in an intake passage of the engine, wherein the compressor pressurizes and delivers intake air; an ejector device having a drive gas passage connected to the intake passage in a manner bypassing the compressor and an ejector arranged in the drive gas passage; a blow-by gas passage allowing communication between the interior of a crankcase of the engine and the interior of the ejector; and a controller adapted to execute a temperature raising control when the controller determines that condensate water is likely to freeze in the ejector device, wherein, in the temperature raising control, the controller raises intake air pressure in a downstream portion of the intake passage with respect to the compressor compared to when the controller determines that the condensate water is unlikely to freeze and adjusts an intake air amount of the engine to restrain increase of the intake air amount that would be caused by increase in the intake air pressure.