公开(公告)号：US20190107061A1

公开(公告)日：2019-04-11

申请号：US16086299

申请日：2017-08-25

Applicant: Mazda Motor Corporation

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

IPC: F02D13/02 ,  F02P5/145 ,  F02P5/04 ,  F02D41/40 ,  F02D41/00

Abstract: This control apparatus for an engine includes an engine, an injector, a spark plug, an intake electric S-VT, an exhaust electric S-VT, and a controller. The controller outputs a control signal to at least one of the intake electric S-VT and the exhaust electric S-VT so as to perform valve control of opening an intake valve when an exhaust valve is open, and then outputs a control signal to the spark plug at predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition.

公开(公告)号：US20190063360A1

公开(公告)日：2019-02-28

申请号：US16056753

申请日：2018-08-07

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Masanari Sueoka ,  Kota Matsumoto ,  Keiji Maruyama

IPC: F02D41/30 ,  F02B11/02 ,  F02D41/00 ,  F02D41/26 ,  F02D41/40

Abstract: A control system for a compression-ignition engine is provided, which includes the engine, a spark plug, a fuel injection valve, an air-fuel ratio control valve, and a control unit. A geometric compression ratio of the engine is 14:1 or above. The control unit includes a processor configured to execute an air-fuel ratio controlling module for, when the engine being in a given operating state is detected, controlling the air-fuel ratio control valve to bring the air-fuel ratio of the entire mixture gas to a given lean air-fuel ratio that is larger than a stoichiometric air-fuel ratio, and an spark plug controlling module for, after this control, outputting the control signal to the spark plug to perform the ignition at a given ignition timing so that the mixture gas starts combustion by flame propagation and then unburned mixture gas self-ignites. The given ignition timing is stored in a memory.

公开(公告)号：US20190063350A1

公开(公告)日：2019-02-28

申请号：US16055908

申请日：2018-08-06

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Masanari Sueoka ,  Kota Matsumoto ,  Keiji Maruyama

IPC: F02D41/00 ,  F02D41/40 ,  F02D41/30 ,  F02B3/06

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.

公开(公告)号：US11203969B2

公开(公告)日：2021-12-21

申请号：US17051700

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: F02B11/00 ,  F02D41/30 ,  F02B31/04 ,  F02D41/00 ,  F02D41/40 ,  F02P5/06 ,  F02D13/02 ,  F02D41/38

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 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 higher when an engine speed is high than when the engine speed is low.

公开(公告)号：US11199152B2

公开(公告)日：2021-12-14

申请号：US17051649

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 ,  F02B31/04 ,  F02D41/40 ,  F02P5/04 ,  F02P5/153 ,  F02P15/08

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 retarded when an in-cylinder pressure specified by an in-cylinder pressure specification section is high than when the in-cylinder pressure is low.

公开(公告)号：US11041457B2

公开(公告)日：2021-06-22

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

IPC: F02F3/00 ,  F02F1/24 ,  F02F3/24 ,  F02F3/26

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.

公开(公告)号：US10914247B2

公开(公告)日：2021-02-09

申请号：US16110119

申请日：2018-08-23

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Keiji Araki

IPC: F02D41/00 ,  F02D35/02 ,  F02B37/16 ,  F02D41/40 ,  F02D41/30 ,  F02M26/22 ,  F02B23/10 ,  F02P5/04 ,  F02D37/02 ,  F02P5/152 ,  F02M26/00 ,  F02D13/02

Abstract: A boosted engine is provided, which includes an engine body formed with a combustion chamber, a spark plug, a fuel injection valve, a booster, a boost controller, and a control unit including an operating range determining module and a compression end temperature estimating module. In a high load range, the fuel injection valve and the spark plug are controlled so that a mixture gas inside the combustion chamber starts combustion through flame propagation by ignition of the spark plug, and unburned mixture gas then combusts by compression ignition, and the boost controller is controlled to bring the booster into a boosting state. When a gas temperature inside the combustion chamber exceeds a given temperature at CTDC, the fuel injection valve is controlled so that a fuel injection end timing occurs on a compression stroke, and the spark plug is controlled so that the mixture gas is ignited after CTDC.

公开(公告)号：US20200309019A1

公开(公告)日：2020-10-01

申请号：US16775530

申请日：2020-01-29

Applicant: Mazda Motor Corporation

Inventor： Atsushi Inoue ,  Tetsuya Chikada ,  Yusuke Kawai

IPC: F02B1/12 ,  F02D41/30

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.

公开(公告)号：US10767577B2

公开(公告)日：2020-09-08

申请号：US16411015

申请日：2019-05-13

Applicant: Mazda Motor Corporation

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

IPC: F02D41/00 ,  F01L13/00 ,  F02D41/30 ,  F02D41/14 ,  F02D13/02 ,  F02B23/10 ,  F02N99/00 ,  F02N19/00

Abstract: A method of implementing control logic of a compression-ignition engine is provided. A controller outputs a signal to a injector and a variable valve operating mechanism so that a gas-fuel ratio (G/F) becomes leaner than a stoichiometric air fuel ratio, and an air-fuel ratio (A/F) becomes equal to or richer than the stoichiometric air fuel ratio, and to an ignition plug so that unburnt mixture gas combusts by self-ignition after the ignition plug ignites mixture gas inside a combustion chamber. The method includes steps of determining a geometric compression ratio and determining the control logic defining an intake valve close timing IVC. IVC (deg.aBDC) is determined so that the following expression is satisfied: if the geometric compression ratio ε is 10≤ε

公开(公告)号：US10648422B2

公开(公告)日：2020-05-12

申请号：US16086305

申请日：2017-08-25

Applicant: Mazda Motor Corporation

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

IPC: F02B23/10 ,  F02D41/30 ,  F02D41/00 ,  F02D13/02 ,  F02D23/02 ,  F02D41/24 ,  F02B1/12 ,  F02B1/04 ,  B60K6/24 ,  F02D45/00

Abstract: A control apparatus for an engine includes an engine, a state quantity setting device, a spark plug, and a controller. After the spark plug ignites air-fuel mixture to start combustion, combustion of unburned air-fuel mixture is caused by autoignition. The controller outputs a control signal to the state quantity setting device such that, when a number of revolutions of the engine is high, a temperature in a combustion chamber before start of compression is higher than that when the number of revolutions of the engine is low.