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公开(公告)号：US20190383208A1
公开(公告)日：2019-12-19
申请号：US16478881
申请日：2017-03-03
Applicant: MAZDA MOTOR CORPORATION
Inventor： Yasushi NAKAHARA , Yohei SUZUKI , Tsuyoshi YAMAMOTO , Michiharu KAWANO , Yuya HONDA , Kento ONISHI
Abstract: In an engine (1), an ignition plug (22) is arranged between a first intake port (6) and a second intake port (7). In a case where a downstream end portion (71) of the second intake port (7) is divided into a first intake port (6) side and an opposite first intake port (6) side, an inner wall surface (71a) of an opposite first intake port (6) side portion extends in a direction toward the first intake port (6) as extending from an upstream side to a downstream side of the second intake port (7).
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公开(公告)号：US20180274407A1
公开(公告)日：2018-09-27
申请号：US15756853
申请日：2017-03-14
Applicant: MAZDA MOTOR CORPORATION
Inventor： Takashi KASHIWABARA , Tsuyoshi YAMAMOTO , Yasushi NAKAHARA , Kouichi SHIMIZU
CPC classification number: F01M9/102 , F01L1/047 , F01L13/0036 , F01L2013/0052 , F01L2810/02 , F01M1/06 , F01M9/10 , F01M9/105
Abstract: An oil supply path passes through members separate from a cylinder head (4) to supply a lubricant to bearings (73, 74) of camshaft journals. The oil supply path includes an oil supply passage (66) for the camshaft above the camshaft (19, 20), a connection passage (64) for the camshaft between the oil supply passage for the camshaft and an internal passage (61, 62) in the cylinder head (4), and branch oil passages (68) for the camshaft journals. Each branch oil passage branches off from the oil supply passage for the camshaft, and is connected to one of the bearings (73, 74) from above. Each of the branch passages includes a throttle (168) with a smaller cross-sectional flow area than the oil supply passage for the camshaft.
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公开(公告)号：US20170167360A1
公开(公告)日：2017-06-15
申请号：US15361511
申请日：2016-11-28
Applicant: MAZDA MOTOR CORPORATION
Inventor： Mitsunori WASADA , Tsuyoshi YAMAMOTO , Yasushi NAKAHARA , Takashi YOUSO , Hiroaki ABE , Takaaki NAGANO , Atsushi INOUE , Kazuhiro NAGATSU , Takashi KAMINAGA , Tatsuya FUJIKAWA
CPC classification number: F02B23/101 , F02B2023/085 , F02F1/242 , F02F3/285 , F02P15/02 , H01T13/20 , Y02T10/125
Abstract: Injection of the fuel by the injector 43 creates a gas flow in the combustion chamber. The gas expands in a radial fashion from an axis of a cylinder toward a radial outside of the cylinder, and then flows from the radial outside along the cylinder head bottom face 221 toward the axis of the cylinder. The spark plug 41 has a gap positioned away from the axis of the cylinder toward the radial outside of the cylinder at a predetermined distance, and placed radially inwardly from a position opposite a rim of an opening of the cavity 242. A side electrode extends to be oriented in a direction perpendicular to the flow of the gas along the cylinder head bottom face. The gap has a center positioned near the cylinder head bottom face, and closer to an interior of a combustion chamber than to the cylinder head bottom face.
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公开(公告)号：US20190383207A1
公开(公告)日：2019-12-19
申请号：US16478880
申请日：2017-03-03
Applicant: MAZDA MOTOR CORPORATION
Inventor： Yasushi NAKAHARA , Yohei SUZUKI , Tsuyoshi YAMAMOTO , Michiharu KAWANO , Yuya HONDA , Kento ONISHI
Abstract: In an engine (1), when an intake valve (16) opens, a downstream end portion (61) of a first intake port (6) extends to direct to between a shade back (162a) positioned on a cylinder axis (C) side with respect to a valve stem (161) and a ceiling surface (51) facing the shade back (162a). As viewed in a section perpendicular to a direction perpendicular to an intake air flow direction, a second intake port side inner wall surface (61a) at the downstream end portion (61) of the first intake port (6) curves apart from a second intake port (7) in a direction from an exhaust side to an intake side as compared to the shape of an opposite second intake port side inner wall surface (61b) mirror-reversed to a second intake port (7) side.
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