公开(公告)号：US20210310445A1

公开(公告)日：2021-10-07

申请号：US17260181

申请日：2019-06-18

Applicant: MAZDA MOTOR CORPORATION

Inventor： Jiro KATO ,  Taketoshi YAMAUCHI ,  Ken YOSHIDA ,  Kenji TAKAMI ,  Kazuaki TANAKA ,  Katsuya ROKUYAMA

IPC: F02M25/08 ,  F02B37/16 ,  F02D9/10 ,  F02M35/10

Abstract: An intake passage of an engine includes a throttle valve, a supercharger, and a bypass passage connecting an upstream side with a downstream side of the supercharger and opening when the supercharger is not acting. When the supercharger is not acting, the intake passage generates forward flows in which intake air flows from the throttle valve toward the supercharger and bypass-directed flows in which the intake air is reversed due to blockage of forward movement by the supercharger and flows from the supercharger side toward a connection port, of the bypass passage, opening in the intake passage. An evaporated fuel introduction opening leading evaporated fuel produced in a fuel tank to the intake passage opens in a wall surface, on which the bypass-directed flow is generated, in the intake passage.

公开(公告)号：US20180266302A1

公开(公告)日：2018-09-20

申请号：US15761206

申请日：2016-11-09

Applicant: MAZDA MOTOR CORPORATION

Inventor： Jiro KATO ,  Tatsuya KOGA ,  Shinji SUMI ,  Haruna YANAGIDA ,  Norihisa MURATA

IPC: F01N13/10

Abstract: Provided is an exhaust device connected to an engine body. The exhaust device includes a plurality of independent exhaust pipes, each of which has a circular cross section, and which are connected to exhaust ports of cylinders of the engine body; and a mixing pipe having a circular cross section, connected to downstream ends of the independent exhaust pipes, and through which exhaust gas that has passed through the independent exhaust pipes flows in. The independent exhaust pipes are connected to an upstream end of the mixing pipe in such a manner that parts of internal spaces of the circular cross sections overlap each other in a predetermined section from the downstream ends of the independent exhaust pipes toward upstream, and a ratio of overlapping portions of the circular cross sections gradually increases from upstream toward downstream.

公开(公告)号：US20210317805A1

公开(公告)日：2021-10-14

申请号：US17190077

申请日：2021-03-02

Applicant: MAZDA MOTOR CORPORATION

Inventor： Jiro KATO ,  Taichi MASUOKA ,  Yuichi TANIGUCHI ,  Taketoshi YAMAUCHI ,  Hirofumi SHINOHARA ,  Akito KUMAMOTO ,  Takashi MIYAMOTO ,  Tatsuhiro ISHIDA

IPC: F02M26/30 ,  F02M26/32

Abstract: An EGR system comprising at least one of an EGR cooler and an EGR valve is arranged above an intake manifold. A pair of facing surfaces which face each other with a space are provided at the EGR system attached to the intake manifold and the intake manifold. A damper plate having elasticity is arranged between these facing surfaces. The damper plate is configured to have a larger thickness than the above-described space and have a smaller Young's modulus than each of a lower-side facing-surface portion and an upper-side facing-surface portion, and the damper plate is clamped between the lower-side facing-surface portion and the upper-side facing-surface portion.

公开(公告)号：US20210222653A1

公开(公告)日：2021-07-22

申请号：US17093320

申请日：2020-11-09

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yoshihiro HAMAZUME ,  Takashi YOSHIKAWA ,  Jiro KATO ,  Taketoshi YAMAUCHI ,  Hirofumi SHINOHARA ,  Kazuhiro NAKAMURA ,  Yoko INAMI ,  Shouichi AIGA ,  Tomoaki FUJIYAMA ,  Kosuke MIYAMOTO ,  Takuya YAMADA

IPC: F02M35/10 ,  F02M31/20 ,  F02M26/13

Abstract: An intake device of an engine comprises an intercooler, an intake passage including a downstream-side intake passage, and an EGR passage recirculating exhaust gas to the downstream-side intake passage. An intake-air supply opening having an opening area smaller than an area of a downstream-side face of an intercooler core is provided at a downstream side wall of a chamber. The downstream-side intake passage includes an extension passage portion extending upwardly along the downstream side wall. The intake-air supply opening includes an upper edge portion which separates the intake air flowing from an inside wall face of the extension passage portion and forms flowing main streams of the intake air inside the extension passage portion. EGR introduction ports are arranged at positions capable of supplying the EGR gas toward the flowing main streams.

公开(公告)号：US20210262420A1

公开(公告)日：2021-08-26

申请号：US17261551

申请日：2019-06-27

Applicant: MAZDA MOTOR CORPORATION

Inventor： Jiro KATO ,  Taketoshi YAMAUCHI ,  Mitsunori WASADA ,  Ken YOSHIDA ,  Kenji TAKAMI ,  Ryo YAMAMOTO ,  Haruna YANAGIDA ,  Masayoshi HIGASHIO ,  Kensuke ASHIKAGA

IPC: F02M26/21 ,  F02M26/19 ,  F02M26/67 ,  F02M26/09 ,  F02B37/16

Abstract: An exhaust gas recirculation (EGR) passage is connected with an intake passage (a bypass passage bypassing a supercharger) of an engine. The EGR passage includes, in a position close to a connection port to the intake passage, an expanding portion in which a passage cross-sectional area expands and which lowers a flow speed of EGR gas so as to reduce an uneven flow, in the connection port, of the EGR gas flowing into the intake passage.