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公开(公告)号：US10801420B2
公开(公告)日：2020-10-13
申请号：US16058243
申请日：2018-08-08
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Kota Matsumoto , Keiji Maruyama
IPC: F02D17/02 , F02B1/12 , F02B23/10 , F02D41/38 , F02P5/04 , F02P5/15 , F02D41/00 , F02B7/00 , F02D41/30 , F02D41/40
Abstract: A control device for a compression-ignition engine is provided, which includes an engine having a plurality of cylinders, spark plug, a fuel injector, and a control unit connected to the spark plug and the fuel injector. The control unit causes the engine to perform an all-cylinder operation when the engine operates at a load above a given load, and perform a reduced-cylinder operation at a load below the given load. In the reduced-cylinder operation, the fuel injector injects fuel to one or some of the cylinders to generate mixture gas, the spark plug ignites the mixture gas, and the engine starts, at an air-fuel ratio larger than a stoichiometric air-fuel ratio and a large compression ratio, SI combustion in which the mixture gas is ignited to combust by flame propagation, and then perform CI combustion in which unburned mixture gas ignites by self-ignition.
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公开(公告)号：US10731590B2
公开(公告)日：2020-08-04
申请号：US16413386
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
Abstract: A compression-ignition engine control system is provided, which includes an intake phase-variable mechanism and a controller. Within a first operating range and a second operating range on a higher engine load side, the controller controls the variable mechanism to form a gas-fuel ratio (G/F) lean environment in which an air-fuel ratio inside a cylinder is near a stoichiometric air-fuel ratio and burnt gas remains inside the cylinder, and controls a spark plug to spark-ignite mixture gas inside the cylinder to combust in a partial compression-ignition combustion. The controller controls the variable mechanism to retard the intake valve open timing on an advancing side of TDC of an exhaust stroke, as the engine load increases within the first range, and advance the intake valve close timing on a retarding side of TDC of intake stroke, as the engine load increases within the second range.
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公开(公告)号：US10697391B2
公开(公告)日：2020-06-30
申请号：US15964925
申请日：2018-04-27
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 a mixture gas inside the combustion chamber, an injector attached to the engine and configured to inject fuel into the combustion chamber, a spark plug disposed to be oriented into the combustion chamber and configured to ignite the mixture gas inside the combustion chamber, and a controller connected to the injector and the spark plug and configured to operate the engine by outputting a control signal to the injector and the spark plug, respectively. After the spark plug ignites the mixture gas to start combustion, unburned mixture gas combusts by self-ignition. The controller outputs the control signal to the injector so that a fuel injection timing is advanced when the engine operates at a high speed than at a low speed.
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公开(公告)号：US10677187B2
公开(公告)日：2020-06-09
申请号：US16087053
申请日：2016-11-25
Applicant: Mazda Motor Corporation
Inventor： Kota Matsumoto , Tomonori Urushihara , Atsushi Inoue , Yusuke Kawai , Toru Miyamoto , Yudai Koshiro
IPC: F02D41/40 , F02D41/00 , F02B1/08 , F02B23/06 , F02B23/10 , F02P5/15 , F02B11/00 , F02D41/30 , F02D41/38 , F02D23/00 , F02B1/12
Abstract: A combustion 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, in a compression stroke, fuel is injected at specific timing at which a line obtained by extending an axis of each hole of the injector overlaps with a specific portion including an opening edge of a cavity in an upper surface of a piston.
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公开(公告)号：US10677186B2
公开(公告)日：2020-06-09
申请号：US16087536
申请日：2017-11-10
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Kota Matsumoto , Tomonori Urushihara
Abstract: A control apparatus for a compression autoignition engine includes an engine, a spark plug, a controller, and sensors. After the spark plug ignites air-fuel mixture to start combustion, unburned air-fuel mixture is combusted by autoignition. The controller changes an SI rate in accordance with an operation state of the engine. Furthermore, the controller adjusts the SI rate when determining that the SI rate needs to be adjusted.
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Patent Agency Ranking
公开(公告)号：US10648443B1
公开(公告)日：2020-05-12
申请号：US16087542
申请日：2017-11-10
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Kota Matsumoto , Tomonori Urushihara
IPC: F02D41/30 , F02B11/00 , F02P5/14 , F02D41/40 , F02B23/02 , F02P5/04 , F02P5/145 , F02D21/08 , F02D37/02 , F02D35/02 , F02D41/00
Abstract: A control apparatus for a compression autoignition engine controls compression autoignition by ignition. The control apparatus includes an injector, a spark plug, and a controller. The controller controls the injector so that fuel is injected by a plurality of divided injections, and thereafter, outputs a control signal to the spark plug at predetermined ignition timing so that, by ignition, unburned air-fuel mixture combusts by autoignition. Control is performed so that, when load on the engine is high, an amount of fuel injected at later timing among the plurality of injections becomes larger than when the load is low.
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公开(公告)号：US20190360450A1
公开(公告)日：2019-11-28
申请号：US16414508
申请日：2019-05-16
Applicant: Mazda Motor Corporation
Inventor： Masanari Sueoka , Atsushi Inoue , Keiji Maruyama , Takuya Ohura , Tomohiro Nishida , Yusuke Kawai , Tetsuya Chikada , Tatsuhiro Tokunaga
Abstract: A control system of a compression-ignition engine includes an intake variable mechanism and a controller. In a second operating range, the controller controls the intake variable mechanism so that, while partial compression-ignition combustion is performed under an air-fuel ratio (A/F) lean environment, an intake valve open timing takes timing at an advanced side of an exhaust TDC. In a first operating range on a lower load side, the controller controls the intake variable mechanism so that, while the partial compression-ignition combustion is performed under the A/F lean environment, under the same engine speed condition, the intake valve close timing is more retarded within a range on a retarded side of an intake BDC as the engine load decreases, and an absolute value of a change rate of the intake valve close timing to the engine load becomes larger than in the second range.
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公开(公告)号：US20190360449A1
公开(公告)日：2019-11-28
申请号：US16413386
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
Abstract: A compression-ignition engine control system is provided, which includes an intake phase-variable mechanism and a controller. Within a first operating range and a second operating range on a higher engine load side, the controller controls the variable mechanism to form a gas-fuel ratio (G/F) lean environment in which an air-fuel ratio inside a cylinder is near a stoichiometric air-fuel ratio and burnt gas remains inside the cylinder, and controls a spark plug to spark-ignite mixture gas inside the cylinder to combust in a partial compression-ignition combustion. The controller controls the variable mechanism to retard the intake valve open timing on an advancing side of TDC of an exhaust stroke, as the engine load increases within the first range, and advance the intake valve close timing on a retarding side of TDC of intake stroke, as the engine load increases within the second range.
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公开(公告)号：US20190360382A1
公开(公告)日：2019-11-28
申请号：US16411962
申请日：2019-05-14
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Keiji Maruyama , Takuya Ohura , Tomohiro Nishida , Yusuke Kawai , Tetsuya Chikada , Tatsuhiro Tokunaga
Abstract: A compression-ignition engine control system is provided, which includes an intake variable mechanism and a controller. Within a first operating range and a second operating range on a higher engine load side, the controller controls the variable mechanism to form a gas-fuel ratio (G/F) lean environment in which an air-fuel ratio inside a cylinder is near a stoichiometric air-fuel ratio and burnt gas remains inside the cylinder, and controls a spark plug to spark-ignite mixture gas inside the cylinder to combust in a partial compression-ignition combustion. The controller controls the variable mechanism to advance the intake valve open timing on an advancing side of a TDC of the exhaust stroke, as the engine load increases within the first range, and retard the intake valve open timing on the advancing side of the TDC of the exhaust stroke, as the engine load increases within the second range.
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公开(公告)号：US20190112989A1
公开(公告)日：2019-04-18
申请号：US16086307
申请日：2017-08-24
Applicant: Mazda Motor Corporation
Inventor： Atsushi Inoue , Masanari Sueoka , Kota Matsumoto , Tomonori Urushihara
Abstract: A control apparatus for a compression autoignition 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, unburned air-fuel mixture is combusted by autoignition. The controller changes, according to an operation state of the engine, a heat amount ratio that represents an index associated with a ratio of an amount of heat generated by air-fuel mixture being combusted by flame propagation, to a total amount of heat generated by air-fuel mixture in the combustion chamber being combusted.
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