-
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。
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
-
-
-
-
-
-
-
-
Search Results
21
records
(took 0.081 seconds)
