公开(公告)号：US09726124B2

公开(公告)日：2017-08-08

申请号：US14824860

申请日：2015-08-12

Applicant: Mazda Motor Corporation

Inventor： Fusatoshi Tanaka ,  Mikiko Kojo ,  Kazuo Iwata ,  Tatsunori Kiyomihara

IPC: F02M35/10 ,  F02M25/08

CPC classification number: F02M35/10222 ,  F02M25/0836 ,  F02M35/10065 ,  F02M35/10321

Abstract: A structure of an intake manifold (1) for an engine is constituted of divided pieces (10, 20, 30). The structure of the intake manifold includes a gas supply hole (53) formed in a predetermined position of an outer surface of the intake manifold, and configured to supply predetermined gas from the outside, and a gas inlet passage (51) formed in predetermined joint surfaces (10m, 20m) of the divided pieces (10, 20), and configured to guide the gas supplied through the gas supply hole to a predetermined gas inlet position (11) of an intake passage (E1).

公开(公告)号：US09920722B2

公开(公告)日：2018-03-20

申请号：US14882935

申请日：2015-10-14

Applicant: MAZDA MOTOR CORPORATION

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

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

CPC classification number: F02M35/108 ,  F02B27/006 ,  F02B27/04 ,  F02M35/10072 ,  F02M35/10078 ,  Y02T10/14 ,  Y02T10/146

Abstract: 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.