公开(公告)号：US11220971B2

公开(公告)日：2022-01-11

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

IPC: F02D41/30 ,  F02D41/40 ,  F02D41/00

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.

公开(公告)号：US11149682B2

公开(公告)日：2021-10-19

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

IPC: F02F3/26 ,  F02B23/10 ,  F02M61/14 ,  F02P15/00

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：US11111871B2

公开(公告)日：2021-09-07

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

IPC: F02D41/40 ,  F02D41/30 ,  F02B1/12 ,  F02D41/00 ,  F02D41/38

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：US11015515B2

公开(公告)日：2021-05-25

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 ,  F02D41/40 ,  F02D41/30 ,  F02B11/00 ,  F02B23/10 ,  F02P15/08 ,  F02D41/00

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.

公开(公告)号：US10995681B2

公开(公告)日：2021-05-04

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

IPC: F02D13/02 ,  F02D41/00 ,  F02D41/38

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.

公开(公告)号：US10907550B2

公开(公告)日：2021-02-02

申请号：US16088013

申请日：2017-08-25

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Masanari Sueoka ,  Kota Matsumoto ,  Tomonori Urushihara

IPC: F02D13/02 ,  F02D41/04 ,  F02D37/02 ,  F02D41/30 ,  F02D41/00 ,  F02P5/15 ,  F02D45/00

Abstract: This control apparatus of an engine includes an engine, a state quantity setting device, an injector, a spark plug, and a controller. The controller outputs a control signal to the spark plug at a predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition, and the controller advances an ignition timing when the temperature before start of compression in a combustion chamber is to be reduced.

公开(公告)号：US20200332728A1

公开(公告)日：2020-10-22

申请号：US16783399

申请日：2020-02-06

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Yusuke Kawai ,  Tetsuya Chikada

IPC: F02D13/02 ,  F02B33/40

Abstract: A control device for an engine is provided, which includes variable intake and exhaust valve operating mechanisms, a supercharger provided to an intake passage and configured to boost intake air introduced into a cylinder, and a controller. The controller drives the supercharger when the engine operates in a boosted range. The controller controls the variable intake and exhaust valve operating mechanisms so that a valve overlap period during which intake and exhaust valves open simultaneously is formed, when the engine operates in a low-speed boosted range of the boosted range where the engine speed is less than a reference speed. The controller controls the variable exhaust valve operating mechanism so that the open timing of the exhaust valve is more advanced when the engine operates in a high-speed boosted range of the boosted range where the engine speed is greater than or equal to the reference speed.

公开(公告)号：US10794323B2

公开(公告)日：2020-10-06

申请号：US16413420

申请日：2019-05-15

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Masanari Sueoka ,  Keiji Maruyama ,  Takuya Ohura ,  Tomohiro Nishida ,  Yusuke Kawai ,  Tetsuya Chikada ,  Tatsuhiro Tokunaga

IPC: F01L1/34 ,  F02D13/02 ,  F02D41/40 ,  F02B1/06 ,  F02D41/30 ,  F02B1/08

Abstract: A compression-ignition engine control system is provided, which includes an intake phase-variable mechanism and a controller. The controller controls the intake phase-variable mechanism to form a gas-fuel ratio (G/F) lean environment in which burnt gas remains inside a cylinder and an air-fuel ratio is near a stoichiometric air-fuel ratio, and controls the spark plug to spark-ignite the mixture gas to combust in a partial compression-ignition combustion. The controller controls the intake phase-variable mechanism to retard, as an engine speed increases at a constant engine load, an intake valve close timing on a retarding side of BDC of intake stroke and an intake valve open timing on an advancing side of TDC of exhaust stroke, and controls the intake phase-variable mechanism so that a change rate in the intake valve open timing according to the engine speed becomes larger in a high engine speed range.

公开(公告)号：US10787985B2

公开(公告)日：2020-09-29

申请号：US16087058

申请日：2016-11-25

Applicant: Mazda Motor Corporation

Inventor： Kota Matsumoto ,  Tomonori Urushihara ,  Atsushi Inoue ,  Yusuke Kawai ,  Toru Miyamoto ,  Yudai Koshiro

IPC: F02D41/30 ,  F02B3/02 ,  F02D41/00 ,  F02D41/40 ,  F02F3/26 ,  F02M61/14 ,  F02P5/04 ,  F02D41/38

Abstract: A control device for a compression autoignition engine includes an engine, a state quantity setting device, a spark plug, a controller, and a sensor. The spark plug receives a control signal from the controller and ignites air-fuel mixture at predetermined ignition timing such that the ignited air-fuel mixture is combusted by flame propagation and then unburned air-fuel mixture in a combustion chamber is combusted by autoignition. The controller outputs a control signal to an injector such that preceding injection and succeeding injection are performed in a compression stroke.

公开(公告)号：US20200248636A1

公开(公告)日：2020-08-06

申请号：US16737050

申请日：2020-01-08

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Yusuke Kawai

IPC: F02D13/02 ,  F02D41/40 ,  F02M26/01 ,  F02P5/15 ,  F02P5/04 ,  F02D41/00 ,  B60W30/18 ,  B60W10/06 ,  B60W10/10

Abstract: A control device for a compression ignition engine is provided. At least in a high-load range where an engine load is higher than a given value, among an operating range where a partial compression ignition combustion is performed, an EGR valve is opened, and a first injection in which fuel is injected at least from an intake stroke to the first half of a compression stroke is carried out. While an engine body is operated in the high-load range, when a torque down request and a request for reducing external EGR gas amount introduced into the cylinder are issued, the opening of the EGR valve is reduced, and a second injection in which fuel is injected in the second half of the compression stroke is carried out, and a ratio of a fuel amount of the second injection to the total fuel amount injected in a combustion cycle is increased.