公开(公告)号：US20180283266A1

公开(公告)日：2018-10-04

申请号：US15762187

申请日：2017-03-21

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yasushi NIWA ,  Mitsuhiro NAKAJIMA

IPC: F02B37/013 ,  F02B37/18 ,  F02C6/12

Abstract: An engine with a turbo supercharger has a first turbo and a second turbo. A first upstream section that is a scroll starting point of a first scroll passage of the first turbo and a second upstream section that is the scroll starting point of a second scroll passage of the second turbo are disposed, respectively, on a side that is farther than a first turbine shaft and a side that is farther than a second turbine shaft with respect to an engine body. The first and second scroll passages are passages scrolled so that downstream sides of the first and second upstream sections face a side closer to the engine body than the respective turbine shafts are, and scroll in opposite directions to each other. Consequently, a first turbine and a second turbine rotate in opposite directions to each other.

公开(公告)号：US20170342895A1

公开(公告)日：2017-11-30

申请号：US15609531

申请日：2017-05-31

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yasushi NIWA ,  Hiroshi SUMIMOTO ,  Mitsuhiro NAKAJIMA

IPC: F02B37/013 ,  F02B37/00 ,  F02B75/20 ,  F02M35/10

CPC classification number: F02B37/013 ,  F02B37/004 ,  F02B67/10 ,  F02B75/20 ,  F02M35/10157 ,  Y02T10/144

Abstract: A turbocharger engine includes an engine body and a turbocharger. The turbocharger includes a large turbo unit having a large turbine chamber, a large compressor chamber, and a large turbine shaft extending between the two chambers; and a small turbo unit having a small turbine chamber, a small compressor chamber, and a small turbine shaft extending between the two chambers. The large compressor chamber is disposed upstream of the small compressor chamber in an intake passage. A large turbo axis and a small turbo axis are disposed to extend generally in the same direction as an engine output axis. The large turbo unit is disposed such that the large turbo axis is non parallel to the engine output axis, and a large-compressor-chamber-side portion of the large turbo axis is closer to the engine output axis than a large-turbine-chamber-side portion thereof in a plan view in an axis direction of the cylinder.