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公开(公告)号：US20210231076A1
公开(公告)日：2021-07-29
申请号：US17051535
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. When the partial compression ignition combustion is carried out, an ignition control section of the control apparatus causes an ignition plug to carry out: main ignition in which a spark is generated to initiate the SI combustion; and preceding ignition in which the spark is generated at an earlier time point than the main ignition. An injection control section causes the ignition plug to inject fuel in an intake stroke. The ignition control section sets energy of the preceding ignition to be lower than energy of the main ignition and causes the ignition plug to carry out the preceding ignition after the fuel injection in the intake stroke or an early period or a middle period of a compression stroke.
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公开(公告)号：US20210189945A1
公开(公告)日：2021-06-24
申请号：US17051663
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. Ignition timing of the preceding ignition is set to be more retarded when fuel concentration specified by a fuel concentration specification section is low than when the fuel concentration is high.
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公开(公告)号：US20200378334A1
公开(公告)日：2020-12-03
申请号：US16618321
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 combustion chamber ceiling surface formed on a cylinder head; and an ignition plug mounted on the combustion chamber ceiling surface, and including an ignition portion disposed in such a way as to face the combustion chamber. The crown surface of the piston includes a cavity which is recessed in a cylinder axis direction in a region including a position below the ignition portion of the ignition plug in a plan view from the cylinder axis direction. A rim portion of the cavity includes a guide portion, raised in the cylinder axis direction with respect to an inner region of the rim portion, interposing the ignition portion when the piston is at a compression top dead center, and configured to guide an air-fuel mixture within the combustion chamber to the ignition portion.
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公开(公告)号：US20200318555A1
公开(公告)日：2020-10-08
申请号：US16808695
申请日：2020-03-04
Applicant: Mazda Motor Corporation
Inventor： Masanari SUEOKA , Junichi TAGA , Hideki OMORI , Keiji MARUYAMA , Tatsuhiro TOKUNAGA , Takuya OHURA , Toru MIYAMOTO , Tomohiro NISHIDA , Kenji TANIMURA , Shinji TAKAYAMA , Yusuke KAWAI , Atsushi INOUE
Abstract: A combustion control device for an engine includes a plurality of cylinders, a surge tank disposed in an intake path to the cylinders, an independent intake passage connecting the surge tank and an intake port of each of the cylinders, a fuel injection valve that is disposed for each of the cylinders and that supplies fuel into each of the cylinders, and a control unit that controls a fuel injection amount of each of the fuel injection valves according to an engine operating state. The control unit corrects a target fuel injection amount of each of the cylinders, the target fuel injection amount being determined according to the engine operating state, based on a re-intake correction amount set in each of the cylinders according to a re-intake amount of intake air from the intake port in internal EGR in each of the cylinders.
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公开(公告)号：US20160252031A1
公开(公告)日：2016-09-01
申请号：US15032899
申请日：2014-10-23
Applicant: MAZDA MOTOR CORPORATION
Inventor： Kazuhiro NAGATSU , Atsushi INOUE , Kota MATSUMOTO , Takashi KAMINAGA , Toru MIYAMOTO , Takashi YOUSO
CPC classification number: F02D41/04 , F01N3/0842 , F01N2570/14 , F02B3/08 , F02B17/005 , F02D13/02 , F02D21/06 , F02D21/08 , F02D21/10 , F02D41/0025 , F02D41/0057 , F02D41/006 , F02D41/0065 , F02D41/02 , F02D41/3023 , F02D41/3035 , F02D41/401 , F02D2041/001 , F02D2041/3052 , F02M25/12 , Y02T10/128 , Y02T10/44 , Y02T10/47
Abstract: A control device for a compression ignition engine includes a controller configured to operate an engine body by compression ignition combustion when the engine body operates in a predetermined compression ignition range. When the engine body operates in a predetermined high load range of the compression ignition range, the controller maximizes a filling amount of the cylinder using a gas state adjustment system, and lowers an EGR ratio so that the air-fuel mixture in the cylinder is lean with an excess air ratio λ higher than 1 in a lower speed range, and maximizes the filling amount of the cylinder, and increases the EGR ratio so that the air-fuel mixture in the cylinder has the excess air ratio λ of 1 or lower in a higher speed range than the lower speed range.
Abstract translation: 压缩点火式发动机的控制装置包括：控制器，被配置为当发动机主体在预定的压缩点火范围内工作时通过压缩点火燃烧来操作发动机主体。 当发动机主体在压缩点火范围的预定的高负载范围内工作时，控制器使用气体状态调节系统最大化气缸的填充量，并且降低EGR率，使得气缸中的空气 - 燃料混合物是稀的 在较低速度范围内的过量空气比λ高于1，并且使气缸的填充量最大化，并且增加EGR率，使得气缸中的空气 - 燃料混合物具有1或更低的过量空气比λ 更高的速度范围比较低的速度范围。
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Patent Agency Ranking
公开(公告)号：US20210363935A1
公开(公告)日：2021-11-25
申请号：US17051522
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 more advanced when a swirl flow is gentle than when the swirl flow is strong.
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公开(公告)号：US20210239069A1
公开(公告)日：2021-08-05
申请号：US17051627
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 advanced 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：US20210222642A1
公开(公告)日：2021-07-22
申请号：US17051692
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 fuel concentration specified by a fuel concentration specification section is low than when the fuel concentration is high.
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公开(公告)号：US20200166003A1
公开(公告)日：2020-05-28
申请号：US16618074
申请日：2018-05-22
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 combustion chamber ceiling surface, an injector and an ignition plug provided on the combustion chamber ceiling surface, and an intake opening and an exhaust opening opened in the combustion chamber ceiling surface. A side where the intake opening is opened is defined as an intake port side, and a side where the exhaust opening is opened is defined as an exhaust port side. An ignition portion of the ignition plug is disposed on the intake port side. The ignition plug is ignited at a timing after the piston passes a compression top dead center. The injector is disposed on the center portion, and is configured to inject fuel toward the exhaust port side. A cavity is provided on the crown surface. A reverse squish flow generation portion is provided in the combustion chamber.
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公开(公告)号：US20200158007A1
公开(公告)日：2020-05-21
申请号：US16678305
申请日：2019-11-08
Applicant: Mazda Motor Corporation
Inventor： Satoshi IMAMURA , Masaki FUKUMA , Yasushi NAKAHARA , Atsushi INOUE , Kota MATSUMOTO , Michiharu KAWANO , Yuya HONDA , Futa NISHI
IPC: F02B23/06
Abstract: A combustion chamber structure for an engine includes a combustion chamber where SI combustion by spark ignition and CI combustion by self-ignition are conducted. A crown surface includes a cavity recessed to have a bowl-shape; a pair of first raised portions having a mound-shape along a pent roof shape; and a second raised portion provided to protrude at a position orthogonal to a ridge extending direction of the pair of first raised portions. With a height of the first raised portion relative to a height position of a deepest portion of the cavity being represented as H1 and a height of the second raised portion being represented as H2, H1/H2 as a ratio of the height H1 of the first raised portion to the height H2 of the second raised portion is set to be in a range of 1.92 or more and 2.75 or less.
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