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公开(公告)号：US20210239068A1
公开(公告)日：2021-08-05
申请号：US17051596
申请日：2019-04-23
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: An engine control apparatus includes an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of a expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Energy of the preceding ignition is set to be lower when an in-cylinder temperature specified by an in-cylinder temperature specification section is high than when the in-cylinder temperature is low.
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公开(公告)号：US20210231078A1
公开(公告)日：2021-07-29
申请号：US17051649
申请日：2019-04-17
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: Provided is an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes an injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Ignition timing of the preceding ignition is set to be more retarded when an in-cylinder pressure specified by an in-cylinder pressure specification section is high than when the in-cylinder pressure is low.
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公开(公告)号：US20210372317A1
公开(公告)日：2021-12-02
申请号：US17051636
申请日：2019-04-23
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: An engine control apparatus includes an ignition control section and an injection control section. When the partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of a expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. The energy of the preceding ignition is set to be higher when the in-cylinder pressure specified by the in-cylinder pressure specification section is high than when the in-cylinder pressure is low.
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公开(公告)号：US20210239067A1
公开(公告)日：2021-08-05
申请号：US17051546
申请日：2019-04-19
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: A control apparatus for a compression-ignition type engine is applied to an engine capable of carrying out partial compression ignition combustion in which an air-fuel mixture is subjected to CI combustion by self-ignition. The control apparatus creates a lean A/F environment where an air-fuel ratio as a ratio between air and fuel in a cylinder exceeds 20 and is lower than 35, or a lean G/F environment where a gas air-fuel ratio as a ratio between entire gas and the fuel in the cylinder exceeds 18 and is lower than 50 and the air-fuel ratio substantially matches a stoichiometric air-fuel ratio. Prior to planned timing of the CI combustion, in the lean A/F environment or the lean G/F environment, the control apparatus causes an ignition plug to generate a spark and to generate a high-temperature portion.
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公开(公告)号：US20210231077A1
公开(公告)日：2021-07-29
申请号：US17051606
申请日：2019-04-23
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: An engine apparatus includes an ignition control section and an injection control section. When the partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Energy of the preceding ignition is set to be lower when a swirl flow is gentle than when the swirl flow is intense.
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Patent Agency Ranking
公开(公告)号：US20210115839A1
公开(公告)日：2021-04-22
申请号：US17051700
申请日：2019-04-23
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: An engine control apparatus includes an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Energy of the preceding ignition is set to be higher when an engine speed is high than when the engine speed is low.
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公开(公告)号：US20210222610A1
公开(公告)日：2021-07-22
申请号：US17051511
申请日：2019-04-17
Applicant: Mazda Motor Corporation
Inventor： Kota MATSUMOTO , Tomonori URUSHIHARA , Keiji MARUYAMA , Masanari SUEOKA , Ryohei ONO , Yuji HARADA , Toru MIYAMOTO , Atsushi INOUE , Tatsuhiro TOKUNAGA , Takuya OHURA , Yusuke KAWAI , Tomohiro NISHIDA , Keita ARAI , Yodai YAMAGUCHI
Abstract: The invention is provided with an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes an injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Timing of the preceding ignition is set to be more retarded when an engine speed is high than when the engine speed is low.
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公开(公告)号：US20200378335A1
公开(公告)日：2020-12-03
申请号：US16618325
申请日：2018-05-31
Applicant: MAZDA MOTOR CORPORATION
Inventor： Satoshi IMAMURA , Masaki FUKUMA , Yasushi NAKAHARA , Atsushi INOUE , Kota MATSUMOTO , Yoshiharu UEKI , Michiharu KAWANO , Yuya HONDA , Kento ONISHI
Abstract: A structure of a combustion chamber for an engine includes a crown surface of a piston, a cylinder wall surface, a combustion chamber ceiling surface, and an ignition plug which includes an ignition portion. The crown surface of the piston includes: a cavity recessed in the cylinder axis direction; a parallel surface portion which is in parallel to a corresponding region on the combustion chamber ceiling surface at a position above the cylinder axis direction with a gap, when the piston is at a compression top dead center; and an inclined surface portion formed to continue to the parallel surface portion in such a way as to be directed to the ignition plug, when the piston is at a compression top dead center. The parallel surface portion and the corresponding region, in combination, constitute a squish flow generation portion generating a squish flow when the piston is lifted.
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公开(公告)号：US20190101064A1
公开(公告)日：2019-04-04
申请号：US16086520
申请日：2017-03-29
Applicant: MAZDA MOTOR CORPORATION
Inventor： Keitaro EZUMI , Kazuhiro TAKEMOTO , Tomokuni KUSUNOKI , Atsushi INOUE , Akitomo TAKAGI , Masanari SUEOKA , Masami NISHIDA , Kazufumi KUMAKURA , Kota MATSUMOTO , Tomohiro HASEGAWA , Tadasu HASHIGUCHI , Toshiaki TAKAHASHI , Masatoshi HIDAKA
Abstract: Disclosed is a control device for a multi-cylinder engine having a combustion chamber (19) to which an intake port (16) and an exhaust port (17) are connected. The control device comprises: an intake-side variable valve operating mechanism (71) for controlling a lift timing of two intake valves (21a, 21b) of the intake port (16); an exhaust-side variable valve operating mechanism (72) for controlling a lift timing of an exhaust valve (22a); and an exhaust-side valve operating mechanism (73) for driving an exhaust valve (22b) at a fixed timing. The control device is operable, when executing cylinder deactivation in a low engine load and low engine speed operating range, to cause the exhaust-side variable valve operating mechanism (72) to open the exhaust valve (22a) during downward movement of a piston (14) in a cylinder (18) being subjected to the cylinder deactivation.
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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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