公开(公告)号：US09920722B2

公开(公告)日：2018-03-20

申请号：US14882935

申请日：2015-10-14

申请人： MAZDA MOTOR CORPORATION

发明人： Fusatoshi Tanaka ,  Mikiko Kojo ,  Motoo Hayakawa ,  Shigehiro Sakogawa ,  Hitoshi Hongou ,  Norifumi Irie

IPC分类号： F02M35/00 ,  F02M35/108 ,  F02B27/00 ,  F02M35/10 ,  F02B27/04

CPC分类号： F02M35/108 ,  F02B27/006 ,  F02B27/04 ,  F02M35/10072 ,  F02M35/10078 ,  Y02T10/14 ,  Y02T10/146

摘要： An intake system of an engine includes an engine and an intake manifold. The intake manifold defines individual intake air passageways each connecting one of cylinders to a volume chamber. Each of the individual intake passageways includes a first route and a second route. The first route has a natural frequency, of an air column, synchronized with a first revolution higher than an engine revolution for maximum torque such that a dynamic supercharging effect is obtained at the first revolution. The second route has a natural frequency, of an air column, synchronized with a second revolution higher than the engine revolution for maximum torque such that a dynamic supercharging effect is obtained at the second revolution. The second revolution differs from the first revolution. A difference between the first and second revolutions is set lower than or equal to 15% of a maximum engine revolution.