公开(公告)号：US20170342894A1

公开(公告)日：2017-11-30

申请号：US15609766

申请日：2017-05-31

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yasushi NIWA ,  Yoshiyuki UEHANE ,  Keiji ARAKI

IPC: F02B37/00 ,  F04D25/04 ,  F02B75/20 ,  F04D29/42 ,  F02B37/18

Abstract: A turbocharger engine includes a dual stage turbocharger in which a first turbo unit is disposed on the upstream side of a second turbo unit on an exhaust passage. The turbocharger is disposed in such a manner that a second turbine shaft of the second turbo unit is far from an engine output shaft than a first turbine shaft of the first turbo unit in a plan view in an axis direction of a cylinder. Further, a second turbine is rotated clockwise around an axis thereof in a side view when the turbocharger is viewed from the side of the turbine, and an intra-turbine passage is disposed on the side of an engine body than the second turbine shaft.

公开(公告)号：US20200040855A1

公开(公告)日：2020-02-06

申请号：US16339551

申请日：2016-10-11

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yoshiyuki UEHANE ,  Ken OHTSUKI ,  Einosuke SUEKUNI ,  Kimio ISHIDA ,  Hiroshi HOSOKAWA ,  Junji WATANABE

IPC: F02M35/12 ,  F02B37/12 ,  F02M35/10 ,  F02D9/02 ,  F02B39/16

Abstract: An intake passage structure for a turbocharger-equipped engine (1) includes a supercharging passage (71) and an air relief passage (72) provided in a compressor case (21a). The air relief passage (72) has an air outflow port (72a) formed through an inner wall surface of an upstream portion (71a) of the supercharging passage (71) upstream of the compressor (21). A projecting member (91) projecting radially inward of a specific portion (90) is provided on a portion of an inner wall surface of the specific portion (90) in a circumferential direction of the inner wall surface. The specific portion (90) ranges from a downstream portion of an upstream intake passage (32) to a portion of the supercharging passage (71) upstream of the air outflow port (72a).

公开(公告)号：US20200040810A1

公开(公告)日：2020-02-06

申请号：US16339464

申请日：2016-10-11

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yoshiyuki UEHANE ,  Ken OHTSUKI ,  Einosuke SUEKUNI ,  Kimio ISHIDA ,  Hiroshi HOSOKAWA ,  Junji WATANABE

IPC: F02B37/12 ,  F02M35/10 ,  F02D9/02 ,  F02B39/16

Abstract: An intake passage structure for a turbocharger-equipped engine (1) includes a supercharging passage (71) and an air relief passage (72) that are provided in a compressor case (72a). The air relief passage (72) has a first passage (73) and a second passage (74), each of which is in a non-linear shape. The first and second passages (73) and (74) each have an air outflow port (73a, 74a) formed through an inner wall surface of an upstream portion (71a) of the supercharging passage (71) upstream of a compressor (21). The air outflow ports (73a, 74a) are formed through different portions of the inner wall surface in a circumferential direction of the inner wall surface so as to overlap with each other in a direction along a central axis of the upstream portion (71a).

公开(公告)号：US20170241329A1

公开(公告)日：2017-08-24

申请号：US15422600

申请日：2017-02-02

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yoshiyuki UEHANE ,  Junji UMEMURA ,  Hideya HORII ,  Tomoaki FUJIYAMA

IPC: F02B37/18 ,  F01D9/02

CPC classification number: F02B37/183 ,  F01D9/026 ,  F01D17/146 ,  F02B37/025 ,  F05D2220/40 ,  Y02T10/144

Abstract: Disclosed herein is a technique for providing an engine supercharger allowing an exhaust gas to efficiently act on a turbine in a wide operating range. A turbine for use in a supercharger includes a turbine housing, a turbine scroll formed inside the housing continuously with a turbine lead-in route, and a turbine wheel to turn on an axis of rotation close to a tongue portion. The turbine lead-in route is partitioned by a partition wall into first and second lead-in routes. Exhaust variable valves are provided upstream of the second lead-in route in order to change the flow rate of the exhaust gas to be introduced. When viewed in the direction in which the axis of rotation extends, a downstream end of the partition is aligned with the axis of rotation and the tongue portion.

公开(公告)号：US20170234211A1

公开(公告)日：2017-08-17

申请号：US15422603

申请日：2017-02-02

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yoshiyuki UEHANE ,  Junji UMEMURA ,  Tomoaki FUJIYAMA ,  Koji HADAMA ,  Makoto MIHARA

IPC: F02B37/18 ,  F01D9/02

CPC classification number: F02B37/183 ,  F01D9/026 ,  F01D17/105 ,  F01D17/148 ,  F01D17/18 ,  F05D2220/40 ,  Y02T10/144

Abstract: Disclosed herein is a technique for providing an engine supercharger of a reduced size allowing an exhaust gas to be introduced smoothly into a turbine scroll. A turbine for use in this supercharger includes: a turbine lead-in route, into which the exhaust gas is introduced; a turbine scroll formed continuously with the turbine lead-in route to allow the exhaust gas to swirl around inside; a turbine wheel to turn on an axis of rotation; a turbine lead-out route; a wastegate passage to bypass the exhaust gas around the turbine scroll; and a wastegate valve. The turbine lead-in route includes a throat portion having a tapered downstream portion. The wastegate passage branches from that throat portion.