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1. (WO2014207831) EXHAUST RECIRCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2014/207831    International Application No.:    PCT/JP2013/067477
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Thu Jun 27 01:59:59 CEST 2013
IPC: F02B 37/00
Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA
トヨタ自動車株式会社
ARIIZUMI, Yoshiki
有泉 義記
AOYAGI, Yusuke
青柳 雄介
Inventors: ARIIZUMI, Yoshiki
有泉 義記
AOYAGI, Yusuke
青柳 雄介
Title: EXHAUST RECIRCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE
Abstract:
By means of the present invention condensation water generated upstream from a compressor is made to flow into a groove (44) and is retained temporarily. The condensation water flowing into the groove (44) moves in the direction of gravitational force (in other words, toward an air bypass valve (ABV) (38)) within the groove (44). When the ABV (38) is opened, the condensation water that has accumulated in the groove (44) is carried along with the flow of a return gas and is blown into the center part of an inlet (46), and then flows from the center part (42b) of the front surface of an impeller (42) to the interior of the compressor (20), together with the intake air flowing in the center part of the inlet. The center part (42b) has a lower circumferential speed than an outer circumferential part (42a), so erosion due to contact with the condensation water can be more easily prevented at the center part than at the outer circumferential part (42a).