公开(公告)号：EP4043711A1

公开(公告)日：2022-08-17

申请号：EP21217831.3

申请日：2021-12-27

申请人： MAZDA MOTOR CORPORATION

发明人： URUSHIHARA, Tomonori ,  SUEOKA, Masanari ,  KAWAI, Yusuke ,  INOUE, Atsushi ,  HIDAKA, Masatoshi ,  MATSUMOTO, Kota ,  TANII, Tota ,  KAWANO, Michiharu ,  MIYAMOTO, Toru ,  ITO, Tsubasa

IPC分类号： F02D13/02 ,  F01L13/00

摘要： An internal combustion engine is provided, which includes a variable phase mechanism configured to change rotational phases of intake and exhaust camshafts so that a valve overlap is made. An intake cam lobe is formed such that an open period of the intake valve is 210° or larger and 330° or smaller of a crank angle. The exhaust cam lobe is formed such that, during the overlap period with the rotational phase of the intake camshaft advanced to the maximum and the rotational phase of the exhaust camshaft retarded to the maximum, an effective valve lift amount (Lift(CA)) of the exhaust valve which is a function of a crank angle from the open timing (CA IVO ) of the intake valve to a middle timing (CA center ) of the overlap period, an inner circumferential length (L_ex) of a valve seat, and a swept volume (V) per cylinder satisfy the following formula: 0.015 ≤ L _ ex V × ∫ CA IVO CA center Lift CA dCA .