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公开(公告)号:US20140109569A1
公开(公告)日:2014-04-24
申请号:US14052424
申请日:2013-10-11
Applicant: MAZDA MOTOR CORPORATION
Inventor: Shuhei TSUJITA , Einosuke SUEKUNI , Junji UMEMURA , Yuki NABETANI
IPC: F02M25/07
CPC classification number: F02M26/44 , F02B37/00 , F02D23/00 , Y02T10/121 , Y02T10/144
Abstract: Disclosed is an exhaust gas recirculation system for an engine (1), wherein at least a downstream sub-region of a region of an exhaust passage (33) upstream of a turbine wheel (52) is divided into two sub-passages (R1, R2) by a partition wall (20a, 30a) extending along an exhaust gas flow direction. A high-speed sub-passage (R2) in the two sub-passages (R1, R2) is equipped with an openable-closable exhaust variable valve (23). The exhaust variable valve (23) is configured to be controlled to open the high-speed sub-passage (R2) when an engine speed is equal to or greater than a reference speed, and close the high-speed sub-passage (R2) when the engine speed is less than the reference speed. An inlet (60a) of an EGR passage (60) on the side of the exhaust passage (33) is opened to the high-speed sub-passage (R2) at a position downstream of the exhaust variable valve (23).
Abstract translation: 公开了一种用于发动机(1)的排气再循环系统,其中在涡轮机叶轮(52)上游的排气通道(33)的区域的至少下游子区域被分成两个子通道(R1, R2)通过沿排气流动方向延伸的分隔壁(20a,30a)。 两个子通路(R1,R2)中的高速子通路(R2)配备有可开闭的排气可变阀(23)。 当发动机转速等于或大于参考速度时,排气可变阀(23)被构造成被控制以打开高速子通道(R2),并且关闭高速子通道(R2) 当发动机转速低于参考速度时。 在排气可变阀(23)的下游侧的位置,在排气通路(33)侧的EGR通路(60)的入口(60a)向高速副通路(R2)开放。