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公开(公告)号：US10883438B2
公开(公告)日：2021-01-05
申请号：US16445097
申请日：2019-06-18
发明人： Yuta Masuda , Masayoshi Higashio , Yugou Sunagare , Michio Ito , Kenko Ujihara , Yuto Matsushima
摘要： A control system for a compression ignition engine is provided, which includes a combustion chamber, a throttle valve, an injector, an ignition plug, a sensor, and a controller. A changing module outputs a signal to the throttle valve so that an air amount increases more than before the change demand, outputs to the injector a signal to increase the fuel amount according to the increase in the air amount so that an air-fuel ratio of the mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and performs a torque adjustment so that an increase of the engine torque caused by the increase in the fuel amount is reduced. When the air amount is determined to have reached a given amount, the changing module ends the increasing of the fuel amount and the torque adjustment, and permits that a second mode module starts the second mode.
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公开(公告)号：US10794317B2
公开(公告)日：2020-10-06
申请号：US16166513
申请日：2018-10-22
IPC分类号： F02D41/30 , F02B1/14 , F02D41/00 , F02D41/40 , F02D41/24 , F02D41/14 , F02D35/02 , F02D41/22
摘要： A control device for a compression-ignition engine in which partial compression-ignition combustion including spark ignition (SI) combustion performed by combusting a portion of a mixture gas inside a cylinder by spark-ignition followed by compression ignition (CI) combustion performed by causing the remaining mixture gas to self-ignite is executed at least within a part of an engine operating range is provided, which includes a detector configured to detect a given parameter that changes as combustion progresses inside the cylinder, an A/F (air-fuel ratio) controller configured to change an air-fuel ratio of air to fuel introduced into the cylinder, and a combustion controller configured to determine combustion stability based on the detected parameter of the detector and control the A/F controller to reduce the air-fuel ratio when it is confirmed that during the partial compression-ignition combustion the combustion stability is low.
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公开(公告)号：US10151254B2
公开(公告)日：2018-12-11
申请号：US15300495
申请日：2015-02-18
摘要： An engine system includes: a hydraulic valve stop mechanism configured to switch states of an intake valve and exhaust valve of a same stopped cylinder; a hydraulic pressure changing device configured to change hydraulic pressure supplied to the valve stop mechanism; and a valve control portion configured to control the hydraulic pressure changing device. When a return from a reduced-cylinder operation to an all-cylinder operation is requested, and an engine revolution is less than a reference revolution, the hydraulic pressure is changed such that opening of one of the valves of the stopped cylinder able to restart at an earlier stage is first restarted. When the return is requested, and the engine revolution is not less than the reference revolution, the hydraulic pressure is changed such that opening of the exhaust valve of the stopped cylinder is restarted before opening of the intake valve.
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公开(公告)号：US10100722B2
公开(公告)日：2018-10-16
申请号：US15129583
申请日：2015-02-06
摘要： A control method of a turbocharged engine includes: a bypass passage bypassing a compressor; and a bypass valve configured to open and close the bypass passage. The method includes: a compressor flow rate predicting step of predicting a flow rate of air flowing through the compressor after a predetermined time; a compressor pressure ratio detecting step of detecting a pressure ratio of the compressor; a surging determining step of determining whether or not surging occurs after the predetermined time, in reference to preliminary prepared surging determination data based on the compressor predicted flow rate and the compressor pressure ratio; and a bypass valve controlling step of opening the bypass valve when it is determined in the surging determining step that the surging occurs and closing the bypass valve when it is determined in the surging determining step that the surging does not occur.
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公开(公告)号：US20200032728A1
公开(公告)日：2020-01-30
申请号：US16452421
申请日：2019-06-25
发明人： Yuto Matsushima , Masayoshi Higashio , Yugou Sunagare , Shinji Takayama , Kenko Ujihara , Yuta Masuda
摘要： A control system for a compression ignition engine includes a combustion chamber, a throttle valve, an injector, an ignition plug, an EGR system, a sensor device and a controller. The controller includes a first mode module, a second mode module and a changing module configured to change an engine mode from a first mode to a second mode in response to a change demand. The changing module outputs signals to the throttle valve and the injector in response to the demand so that an air-fuel ratio of mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and outputs a signal to the EGR system so that an EGR gas amount decreases more than before the demand, and when the EGR gas amount is determined to be decreased to a given amount, the changing module permits that the second mode module starts the second mode.
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公开(公告)号：US20200032698A1
公开(公告)日：2020-01-30
申请号：US16456274
申请日：2019-06-28
发明人： Yuto Matsushima , Masayoshi Higashio , Yugou Sunagare , Shinji Takayama , Kenko Ujihara , Yuta Masuda
摘要： A control system for a compression ignition engine configured to start compression ignition combustion by igniting mixture gas formed by injecting fuel into combustion chambers is provided, which includes combustion chambers each defined in respective cylinders so that displacements of the combustion chambers change by respective pistons reciprocating, a throttle valve, ignition plugs, injectors, a sensor having measuring parts including an atmospheric-pressure detector configured to detect an atmospheric pressure, and configured to measure parameters related to operation of the engine, and a controller. The controller executes a lean compression ignition combustion control in which compression ignition combustion is performed at a given lean air-fuel ratio higher than a stoichiometric air-fuel ratio. The controller restricts the execution of the lean compression ignition combustion control when the controller determines that the atmospheric pressure is lower than a given threshold based on a signal outputted from the atmospheric-pressure detector.
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公开(公告)号：US20190145306A1
公开(公告)日：2019-05-16
申请号：US16166481
申请日：2018-10-22
发明人： Daisuke Tanaka , Yuichiro Tsumura , Kenichi Nakashima , Taiki Maiguma , Hiroki Morimoto , Masayoshi Higashio , Kensuke Ashikaga
摘要： A control device for a compression-ignition engine is provided, in which partial compression-ignition combustion including spark ignition (SI) combustion performed by combusting a portion of mixture gas inside a cylinder by spark-ignition followed by compression ignition (CI) combustion performed by causing the rest of the mixture gas inside the cylinder to self-ignite is executed within a part of an operating range of the engine. The device includes a detector configured to detect a parameter related to noise caused by the combustion inside the cylinder, an EGR (exhaust gas recirculation) controller configured to change an EGR ratio being a ratio of exhaust gas introduced into the cylinder, and a combustion controller configured to control the EGR controller to increase the EGR ratio when a noise index value specified based on the detected parameter of the detector is confirmed to exceed a given threshold during the partial compression-ignition combustion.
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公开(公告)号：US20190063394A1
公开(公告)日：2019-02-28
申请号：US16058122
申请日：2018-08-08
发明人： Kenichi Nakashima , Keitaro Ezumi , Yuichiro Tsumura , Daisuke Tanaka , Taiki Maiguma , Takuji Okumura , Kensuke Ashikaga , Masayoshi Higashio
CPC分类号： F02P5/152 , F02B1/12 , F02B7/00 , F02D35/023 , F02D37/02 , F02D41/3041 , F02D2041/0015 , F02D2200/025 , F02D2200/0602 , F02P5/1502 , F02P5/153
摘要： A control device for an engine in which partial compression-ignition combustion including SI combustion performed by forcibly combusting a portion of mixture gas inside a cylinder followed by CI combustion performed by causing the rest of the mixture gas inside the cylinder to self-ignite is executed within a part of an operating range of the engine, is provided. The device includes a detector configured to detect a parameter related to noise caused by the combustion inside the cylinder, a memory configured to store a characteristic defining a relationship between a start timing of the CI combustion and a combustion noise index, and a processor configured to specify a given combustion noise index value based on the detection value of the detector, and control the start timing of the CI combustion.
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公开(公告)号：US10794316B2
公开(公告)日：2020-10-06
申请号：US16459523
申请日：2019-07-01
发明人： Yuto Matsushima , Masayoshi Higashio , Yugou Sunagare , Shinji Takayama , Kenko Ujihara , Yuta Masuda
摘要： A control system for a compression ignition engine is provided, which includes a combustion chamber, a throttle valve, an injector, an ignition, a swirl control valve, a sensor and a controller. The controller is configured to execute a first mode module, a second mode module, and a changing module to change an engine mode from a first mode to a second mode in response to a change demand. The changing module outputs signals to the throttle valve and the injector in response to the demand so that an air-fuel ratio of mixture gas becomes a stoichiometric air-fuel ratio, and outputs a signal to the swirl control valve so that an EGR gas amount decreases more than before the demand, and when the EGR gas amount is determined to be decreased to a given amount, the changing module causes the second mode module to start the second mode.
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公开(公告)号：US20200032734A1
公开(公告)日：2020-01-30
申请号：US16445097
申请日：2019-06-18
发明人： Yuta Masuda , Masayoshi Higashio , Yugou Sunagare , Michio Ito , Kenko Ujihara , Yuto Matsushima
摘要： A control system for a compression ignition engine is provided, which includes a combustion chamber, a throttle valve, an injector, an ignition plug, a sensor, and a controller. A changing module outputs a signal to the throttle valve so that an air amount increases more than before the change demand, outputs to the injector a signal to increase the fuel amount according to the increase in the air amount so that an air-fuel ratio of the mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and performs a torque adjustment so that an increase of the engine torque caused by the increase in the fuel amount is reduced. When the air amount is determined to have reached a given amount, the changing module ends the increasing of the fuel amount and the torque adjustment, and permits that a second mode module starts the second mode.
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