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公开(公告)号：US10801393B2
公开(公告)日：2020-10-13
申请号：US16456274
申请日：2019-06-28
Applicant: Mazda Motor Corporation
Inventor： Yuto Matsushima , Masayoshi Higashio , Yugou Sunagare , Shinji Takayama , Kenko Ujihara , Yuta Masuda
Abstract: 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：US20200032717A1
公开(公告)日：2020-01-30
申请号：US16459523
申请日：2019-07-01
Applicant: Mazda Motor Corporation
Inventor： Yuto Matsushima , Masayoshi Higashio , Yugou Sunagare , Shinji Takayama , Kenko Ujihara , Yuta Masuda
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20170145907A1
公开(公告)日：2017-05-25
申请号：US15129583
申请日：2015-02-06
Applicant: Mazda Motor Corporation
Inventor： Takafumi Nishio , Masayoshi Higashio , Yugou Sunagare
CPC classification number: F02B37/16 , F02B39/16 , F02B2037/125 , F02D41/0007 , F02D41/1401 , F02D2041/1412 , F02D2200/602 , Y02T10/144
Abstract: 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：US10815910B2
公开(公告)日：2020-10-27
申请号：US16450704
申请日：2019-06-24
Applicant: Mazda Motor Corporation
Inventor： Yuta Masuda , Masayoshi Higashio , Yugou Sunagare , Michio Ito , Kenko Ujihara , Yuto Matsushima
Abstract: A control system for a compression ignition engine is provided, which includes a sensor and a cylinder count control module which changes between all-cylinder and reduced-cylinder operations when the compression ignition combustion is performed at a given lean air-fuel ratio. The cylinder count control module executes a preparation control to change from the all-cylinder operation to the reduced-cylinder operation when the change is demanded. In the preparation control, the cylinder count control module outputs a signal to a throttle valve to execute an air amount increase processing, outputs a signal to a fuel injection valve to execute a fuel amount increase processing, and outputs a signal to an ignition plug to execute a retard processing. The cylinder count control module ends the fuel amount increase processing and the retard processing when it is determined that an air-fuel ratio is in a given air-fuel ratio state, and starts the reduced-cylinder operation.
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公开(公告)号：US20200032736A1
公开(公告)日：2020-01-30
申请号：US16457137
申请日：2019-06-28
Applicant: Mazda Motor Corporation
Inventor： Yuta Masuda , Masayoshi Higashio , Yugou Sunagare , Michio Ito , Kenko Ujihara , Yuto Matsushima
Abstract: 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 of the controller outputs a signal to the throttle valve so that an air amount increases more than before a demand of changing from a first mode to a second mode, and outputs to the injector a signal to increase a fuel amount according to the air amount increase so that an air-fuel ratio of mixture gas becomes at or substantially at a stoichiometric air-fuel ratio, and outputs to the ignition plug a signal to retard an ignition timing so that an engine torque increase caused by the fuel amount increase is reduced. The changing module reduces the retarding of the ignition timing when the ignition timing is determined to have reached a retard limit.
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公开(公告)号：US20200032720A1
公开(公告)日：2020-01-30
申请号：US16450704
申请日：2019-06-24
Applicant: Mazda Motor Corporation
Inventor： Yuta Masuda , Masayoshi Higashio , Yugou Sunagare , Michio Ito , Kenko Ujihara , Yuto Matsushima
Abstract: A control system for a compression ignition engine is provided, which includes a sensor and a cylinder count control module which changes between all-cylinder and reduced-cylinder operations when the compression ignition combustion is performed at a given lean air-fuel ratio. The cylinder count control module executes a preparation control to change from the all-cylinder operation to the reduced-cylinder operation when the change is demanded. In the preparation control, the cylinder count control module outputs a signal to a throttle valve to execute an air amount increase processing, outputs a signal to a fuel injection valve to execute a fuel amount increase processing, and outputs a signal to an ignition plug to execute a retard processing. The cylinder count control module ends the fuel amount increase processing and the retard processing when it is determined that an air-fuel ratio is in a given air-fuel ratio state, and starts the reduced-cylinder operation.
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公开(公告)号：US20170089276A1
公开(公告)日：2017-03-30
申请号：US15256129
申请日：2016-09-02
Applicant: Mazda Motor Corporation
Inventor： Yugou Sunagare , Takafumi Nishio , Chikako Ohisa , Masayoshi Higashio
CPC classification number: F02D41/0007 , F02B39/16 , F02D11/105 , F02D41/0047 , F02D41/10 , F02D41/12 , F02D2041/001 , F02D2200/0406 , F02D2200/602 , F02D2200/703 , F02M35/10157 , F02M35/10373 , Y02T10/144
Abstract: A control system of a turbocharged engine is provided, which includes a turbocharger having a compressor disposed in an intake passage, a bypass passage for bypassing the compressor in the intake passage, and a bypass valve provided to the bypass passage and for opening and closing the bypass passage. The control system includes a processor configured to execute a surge estimating module for estimating an occurrence of a surge, a bypass valve controlling module for opening the bypass valve when the surge estimating module estimates that the surge occurs, and a target air charge amount setting module for suppressing, when the bypass valve controlling module opens the bypass valve, a reduction of a target air charge amount until the opening operation of the bypass valve completes.
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