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公开(公告)号：US11448156B2
公开(公告)日：2022-09-20
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：US20220260024A1
公开(公告)日：2022-08-18
申请号：US17457307
申请日：2021-12-02
Applicant: Mazda Motor Corporation
Inventor： Tomonori Urushihara , Masanari Sueoka , Yusuke Kawai , Atsushi Inoue , Masatoshi Hidaka , Kota Matsumoto , Tota Tanii , Michiharu Kawano , Toru Miyamoto , Tsubasa Ito
Abstract: An internal combustion engine is provided, which includes a variable phase mechanism configured to change rotational phases of intake and exhaust camshafts so that a valve overlap is made. An intake cam lobe is formed such that an open period of the intake valve is 210° or larger and 330° or smaller of a crank angle. The exhaust cam lobe is formed such that, during the overlap period with the rotational phase of the intake camshaft advanced to the maximum and the rotational phase of the exhaust camshaft retarded to the maximum, an effective valve lift amount (Lift(CA)) of the exhaust valve which is a function of a crank angle from the open timing (CAIVO) of the intake valve to a middle timing (CAcenter) of the overlap period, an inner circumferential length (L_ex) of a valve seat, and a swept volume (V) per cylinder satisfy the following formula: 0 . 0 1 5 ≤ L_ex V × ∫ C A IVO C A c e n t e r Lif t ( CA ) d C A .
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公开(公告)号：US11415066B1
公开(公告)日：2022-08-16
申请号：US17457307
申请日：2021-12-02
Applicant: Mazda Motor Corporation
Inventor： Tomonori Urushihara , Masanari Sueoka , Yusuke Kawai , Atsushi Inoue , Masatoshi Hidaka , Kota Matsumoto , Tota Tanii , Michiharu Kawano , Toru Miyamoto , Tsubasa Ito
Abstract: An internal combustion engine is provided, which includes a variable phase mechanism configured to change rotational phases of intake and exhaust camshafts so that a valve overlap is made. An intake cam lobe is formed such that an open period of the intake valve is 210° or larger and 330° or smaller of a crank angle. The exhaust cam lobe is formed such that, during the overlap period with the rotational phase of the intake camshaft advanced to the maximum and the rotational phase of the exhaust camshaft retarded to the maximum, an effective valve lift amount (Lift(CA)) of the exhaust valve which is a function of a crank angle from the open timing (CAIVO) of the intake valve to a middle timing (CAcenter) of the overlap period, an inner circumferential length (L_ex) of a valve seat, and a swept volume (V) per cylinder satisfy the following formula: 0 . 0 1 5 ≤ L _ ex V × ∫ C A IVO C A c e n t e r Lift ( CA ) d C A .
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公开(公告)号：US11326543B2
公开(公告)日：2022-05-10
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
IPC: F02D41/30 , F02B5/00 , F02B9/02 , F02B31/06 , F02D13/02 , F02D41/40 , F02P5/04 , F02P5/15 , F02D41/38
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：US11248520B2
公开(公告)日：2022-02-15
申请号：US16775530
申请日：2020-01-29
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Tetsuya Chikada , Yusuke Kawai
Abstract: An engine system capable of controlling an intake air flow includes a combustion chamber, an ignition plug, an intake air flow control valve, and a controller. The controller performs, in at least a part of an operating range, SPCCI combustion in which after jump-spark ignition combustion of a portion of a mixture gas inside the combustion chamber by a jump-spark ignition of the ignition plug, compression ignition combustion of the remaining mixture gas is carried out by a self-ignition. The controller strengthens, at least in a part of the operating range of SPCCI combustion, the intake air flow inside the combustion chamber by controlling the intake air flow control valve. The controller controls, in a middle-load range of the operating range where SPCCI combustion is performed, the intake air flow control valve so that the intake air flow becomes weaker than in a high-load range and a low-load range.
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Patent Agency Ranking
公开(公告)号：US11168639B2
公开(公告)日：2021-11-09
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
IPC: F02P1/00 , F02D41/30 , F02P5/04 , F02P5/15 , F02D41/14 , F02P15/08 , F02B31/06 , F02D41/40 , F02B9/02 , F02D41/38
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：US11118499B2
公开(公告)日：2021-09-14
申请号：US16618041
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 formed on a cylinder head, 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, with respect to a position, as a reference, where an ignition portion of the ignition plug is disposed in a plan view from one side in a cylinder axis direction, the injector is configured to inject fuel toward the exhaust port side, and a reverse squish flow generation portion, which draws an air-fuel mixture toward the intake port side, is provided in the combustion chamber.
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公开(公告)号：US11105255B2
公开(公告)日：2021-08-31
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：US10982616B2
公开(公告)日：2021-04-20
申请号：US16640143
申请日：2018-08-23
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Yusuke Kawai , Tetsuya Chikada
IPC: F02D41/30 , F02B11/02 , F02B23/02 , F02B23/10 , F02D13/02 , F02D41/00 , F02D41/40 , F02P5/04 , F02P5/15 , F02D15/00 , F02M26/23 , F02D41/38
Abstract: When the geometric compression ratio of an engine body is set to 13:1 or more and the engine body operates in a preset high load region, the effective compression ratio of the engine body is set to 12:1 or more with a difference from the geometric compression ratio being within 2, a gas to be introduced into a combustion chamber is supercharged by a supercharging system, fuel is injected at least in a compression stroke by an injector, and after the fuel injection is finished, an air-fuel mixture in the combustion chamber is ignited by an ignition device before the compression top dead center and is thus burned by flame propagation in the engine body, and then the unburned air-fuel mixture is burned by compression ignition.
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公开(公告)号：US10895208B2
公开(公告)日：2021-01-19
申请号：US16055908
申请日：2018-08-06
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Kota Matsumoto , Keiji Maruyama
Abstract: A control system for a compression-ignition engine is provided, which includes an engine configured to combust a mixture gas inside a combustion chamber by compression ignition, a fuel injector attached to the engine, a state function adjusting part attached to the engine and configured to adjust at least introduction of fresh air into the combustion chamber, a three-way catalyst provided in an exhaust passage of the engine, a wall temperature acquiring part configured to acquire a parameter related to a temperature of a wall of the combustion chamber, and a controller. A swirl flow is generated inside the combustion chamber to circle along the wall. When the wall temperature of the combustion chamber is below a given wall temperature, the controller sets an air-fuel ratio of the mixture gas substantially to a stoichiometric air-fuel ratio so as to remain within a purification window of the three-way catalyst.
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