公开(公告)号：US20210207550A1

公开(公告)日：2021-07-08

申请号：US16071421

申请日：2017-01-12

申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.

发明人： Yoshihiko AKAGI ,  Masashi SEIMIYA ,  Seiji ASANO ,  Wataru KATOU ,  Masanori NUKUI ,  Masahiro SATO

IPC分类号： F02D41/14 ,  F02P5/152

摘要： Provided is a knocking detection apparatus capable of reducing erroneous determination of knocking during transition, and improving knocking detection accuracy regardless of whether an engine is in steady operation or transient operation. A knocking detection apparatus according to the present invention estimates a background level based on an operating state of an internal combustion engine, and calculates a knocking determination index by using the estimated value.