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公开(公告)号：US20200332735A1
公开(公告)日：2020-10-22
申请号：US16775589
申请日：2020-01-29
Applicant: Mazda Motor Corporation
Inventor： Keiji Maruyama , Takuya Ohura , Masanari Sueoka , Tatsuhiro Tokunaga , Toru Miyamoto , Tomohiro Nishida
Abstract: A control device is provided for an engine in which premixed compression ignition combustion is carried out. The device includes an air amount adjusting mechanism, a variable valve mechanism, an exhaust choke valve, a water temperature sensor, and a processor. The processor controls the variable valve mechanism so that a valve overlap period of a given amount or more is formed in a low-load range where the engine load is low, and controls an injector, the air amount adjusting mechanism, and the exhaust choke valve so that A/F lean mixture gas is formed inside a combustion chamber, and premixed compression ignition combustion of the mixture gas is carried out. During the operation in the low-load range, the combustion controlling module makes an opening of the exhaust choke valve when a temperature parameter is low, smaller than that when the temperature parameter is high.
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公开(公告)号：US20200332704A1
公开(公告)日：2020-10-22
申请号：US16775562
申请日：2020-01-29
Applicant: Mazda Motor Corporation
Inventor： Keiji Maruyama , Takuya Ohura , Masanari Sueoka , Tatsuhiro Tokunaga , Toru Miyamoto , Tomohiro Nishida
Abstract: A control device is provided for an engine in which SPCCI combustion is carried out in which SI combustion of a portion of a mixture gas is performed by jump-spark ignition, and CI combustion of the remaining mixture gas is performed by self-ignition. When the engine is low load and a temperature is less than a given value, an early injection in which fuel is injected during an intake stroke and a retarded injection in which fuel is injected during the second half of a compression stroke are performed, and SPCCI combustion of A/F-lean mixture gas is performed. When the engine is low load and the temperature is greater than or equal to the given value, an injection amount ratio of the early injection is increased and the ratio of the retarded injection is decreased, and SPCCI combustion of A/F-lean mixture gas is performed.
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公开(公告)号：US10539098B2
公开(公告)日：2020-01-21
申请号：US15960880
申请日：2018-04-24
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Kota Matsumoto , Yusuke Kawai , Toru Miyamoto , Yudai Koshiro
Abstract: A control system of a compression-ignition engine is provided, which includes an engine configured to cause combustion of mixture gas inside a combustion chamber, a spark plug, and a controller configured to operate the engine. The combustion is performed in a given mode in which, after the spark plug ignites the mixture gas to start combustion, unburned mixture gas combusts by self-ignition. The controller has a heat amount ratio changing module configured to change, according to an engine operating state, a heat amount ratio as an index relating to a ratio of a heat amount generated when the mixture gas combusts by flame propagation with respect to a total heat amount generated when the mixture gas inside the combustion chamber combusts. The controller causes the changing module to increase the heat amount ratio at a high engine speed than at a low engine speed.
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公开(公告)号：US20190063361A1
公开(公告)日：2019-02-28
申请号：US16107630
申请日：2018-08-21
Applicant: Mazda Motor Corporation
Inventor： Naohiro Yamaguchi , Hiroki Morimoto , Toru Miyamoto , Akira Noomo
Abstract: A control system for a pre-mixture compression-ignition engine is provided, configured such that in a first combustion mode, the control unit controls the fuel injection valve to have a fuel amount within a mixture gas in an outer circumferential portion of the combustion chamber larger than in the center portion, the swirl generating part to generate a swirl flow in the outer circumferential portion, and the spark plug to ignite the mixture gas in the center portion. In a second combustion mode, the control unit controls the fuel injection valve to start a fuel injection on intake stroke so that the mixture gas is formed in the entire combustion chamber, the swirl generating part so that a swirl flow becomes weaker than in the first combustion mode, and the spark plug to ignite the mixture gas before CTDC.
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公开(公告)号：US20160201551A1
公开(公告)日：2016-07-14
申请号：US14980243
申请日：2015-12-28
Applicant: Mazda Motor Corporation
Inventor： Kenji Uchida , Tatsuya Fujikawa , Masahisa Yamakawa , Daisuke Asaji , Kazuhiro Nagatsu , Takashi Kaminaga , Toru Miyamoto , Takashi Youso , Hiroaki Abe
CPC classification number: F02B23/101 , F02B2023/085 , F02B2023/102 , F02B2275/40 , F02F1/4214 , F02F3/28 , Y02T10/125
Abstract: A combustion chamber structure for an engine is provided. The structure includes a piston formed with a downward dented cavity in a central part of an upper surface thereof, and a cylinder head forming a combustion chamber having a pent-roof shape. The upper surface of the piston has an annular part extending from an outer edge of the cavity to an outer edge of the upper surface, and surrounding the outer edge of the cavity. The annular part is formed with first and second piston upper surface portions. When the piston is at a top dead center, a ratio of a volume of a space formed between the first piston upper surface portion and a bottom surface of the cylinder head with respect to a volume of a space formed between the second piston upper surface portion and the bottom surface becomes below a predetermined value.
Abstract translation: 提供了一种用于发动机的燃烧室结构。 该结构包括在其上表面的中心部分形成有向下凹陷腔的活塞和形成具有顶顶形状的燃烧室的气缸盖。 活塞的上表面具有从空腔的外边缘延伸到上表面的外边缘并围绕空腔的外边缘的环形部分。 环形部分形成有第一和第二活塞上表面部分。 当活塞处于上止点时，形成在第一活塞上表面部分和气缸盖底面之间的空间的体积相对于形成在第二活塞上表面部分 并且底面变得低于预定值。
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Patent Agency Ranking
公开(公告)号：US11326508B2
公开(公告)日：2022-05-10
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：US11313269B2
公开(公告)日：2022-04-26
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：US10982615B2
公开(公告)日：2021-04-20
申请号：US16087600
申请日：2017-08-24
Applicant: Mazda Motor Corporation
Inventor： Kota Matsumoto , Tomonori Urushihara , Atsushi Inoue , Yusuke Kawai , Toru Miyamoto , Yudai Koshiro
Abstract: A control apparatus for an engine includes an engine, a state quantity setting device, a spark plug, and a controller. The spark plug ignites air-fuel mixture at predetermined ignition timing so that unburned air-fuel mixture combusts by autoignition after start of combustion of the air-fuel mixture by the ignition, and the controller adjusts a heat amount ratio in accordance with an operation state of the engine through change of the ignition timing, the heat amount ratio representing an index associated with a ratio of an amount of heat generated when the air-fuel mixture combusts by flame propagation with respect to a total amount of heat generated when the air-fuel mixture combusts in the combustion chamber.
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公开(公告)号：US10914259B2
公开(公告)日：2021-02-09
申请号：US16775589
申请日：2020-01-29
Applicant: Mazda Motor Corporation
Inventor： Keiji Maruyama , Takuya Ohura , Masanari Sueoka , Tatsuhiro Tokunaga , Toru Miyamoto , Tomohiro Nishida
Abstract: A control device is provided for an engine in which premixed compression ignition combustion is carried out. The device includes an air amount adjusting mechanism, a variable valve mechanism, an exhaust choke valve, a water temperature sensor, and a processor. The processor controls the variable valve mechanism so that a valve overlap period of a given amount or more is formed in a low-load range where the engine load is low, and controls an injector, the air amount adjusting mechanism, and the exhaust choke valve so that A/F lean mixture gas is formed inside a combustion chamber, and premixed compression ignition combustion of the mixture gas is carried out. During the operation in the low-load range, the combustion controlling module makes an opening of the exhaust choke valve when a temperature parameter is low, smaller than that when the temperature parameter is high.
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公开(公告)号：US10914244B2
公开(公告)日：2021-02-09
申请号：US16054133
申请日：2018-08-03
Applicant: Mazda Motor Corporation
Inventor： Kota Matsumoto , Tomonori Urushihara , Masanari Sueoka , Keiji Maruyama , Toru Miyamoto , Yudai Koshiro , Gyetae Pak
IPC: F02D19/02 , F02D41/30 , F02D41/40 , F02M61/18 , F02D19/06 , F02D41/00 , F02M21/02 , F02M61/14 , F02B23/10 , F01B11/00 , F02M67/14
Abstract: A control device of an engine including a cylinder, a piston, a cylinder head, and a combustion chamber is provided, which includes intake and exhaust ports, a swirl control valve provided in an intake passage connected to the intake port, a fuel injection valve attached to the cylinder head to be oriented into the center of the combustion chamber in a plan view thereof, and having first and second nozzle ports, and a control unit. The control unit includes a processor configured to execute a swirl opening controlling module to output the control signal to the swirl control valve to have a given opening at which a swirl ratio inside the combustion chamber becomes 2 or above, and a fuel injection timing controlling module to output the control signal to the fuel injector to inject fuel at a given timing at which the swirl ratio becomes 2 or above.
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