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公开(公告)号：US20220010762A1
公开(公告)日：2022-01-13
申请号：US17293735
申请日：2019-12-23
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI , Hidefumi IWAKI
Abstract: Due to changes in a flow of an air-fuel mixture in a cylinder, reliable ignition due to spark discharge may not be possible. Therefore, an ignition control unit 24 includes a secondary voltage calculation unit 31 that calculates an average value of a secondary voltage generated on a secondary side of an ignition coil, an irregular flow ratio calculation unit 32 that calculates a ratio of cycles in which the average value of the secondary voltage is equal to or less than a set average value with respect to a cycle of the internal combustion engine in a predetermined period as an irregular flow ratio indicating that the flow of the air-fuel mixture in the cylinder is irregular, and an ignition operation amount correction unit 37 that corrects an ignition operation amount so that the irregular flow ratio is equal to or less than the set ratio value that is the target to be reached of the irregular flow ratio.
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公开(公告)号：US20250101928A1
公开(公告)日：2025-03-27
申请号：US18730828
申请日：2023-02-20
Applicant: Hitachi Astemo, Ltd.
Inventor： Yoshihiro SUKEGAWA , Kengo KUMANO , Yoshihiko AKAGI , Kazuhiro ORYOJI
Abstract: This in-vehicle control device includes: a cooling period setting unit that sets a timing prior to the start timing of a predicted knock occurrence period as the increasing timing of a cooling amount of a combustion room, and sets a timing prior to an end timing of the predicted knock occurrence period as the decreasing timing of the cooling amount of the combustion room; and a cooling amount change unit that changes the cooling amount of the combustion room by a cooling mechanism on the basis of the set increasing and decreasing timings and a target cooling amount set by a target cooling amount setting unit.
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公开(公告)号：US20230079934A1
公开(公告)日：2023-03-16
申请号：US17793550
申请日：2021-01-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI , Ryutaro KOIWAI
Abstract: Provided is a control device of an internal combustion engine capable of increasing the temperature of a catalyst and the temperature of coolant more efficient1y than a conventional waste heat control device. A control device acquires a coolant temperature T_cw and a catalyst temperature T_cat of an exhaust system and controls an ignition timing θ of the internal combustion engine. The control device executes coolant heating control for increasing the energy distribution from the internal combustion engine to the coolant when the coolant temperature T_cw is equal to or less than a first threshold, and catalyst heating control for increasing the energy distribution from the internal combustion engine to the exhaust gas when the catalyst temperature T_cat is equal to or less than a second threshold.
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公开(公告)号：US20220325687A1
公开(公告)日：2022-10-13
申请号：US17634820
申请日：2020-07-07
Applicant: Hitachi Astemo, Ltd.
Inventor： Kengo KUMANO , Kazuhiro ORYOJI , Masayuki SARUWATARI
Abstract: In an engine including an auxiliary chamber having an ignition plug therein, an amount of heat generated in the auxiliary chamber tends to be large, and thus it is necessary to suppress abnormal combustion. However, when a sensor is added to the ignition plug, a manufacturing cost of the ignition plug tends to increase. An ECU 2 includes an auxiliary chamber temperature estimation unit 21 that estimates a temperature of the auxiliary chamber 42, and an ignition control unit 22 that delays an ignition timing at a first decrease degree defined in accordance with a change amount of the ignition timing with respect to the temperature of the auxiliary combustion chamber as the temperature of the auxiliary chamber 42 increases in a case where the estimated temperature of the auxiliary chamber 42 is included in a middle temperature region equal to or lower than a first set temperature.
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公开(公告)号：US20220235719A1
公开(公告)日：2022-07-28
申请号：US17596433
申请日：2020-06-23
Applicant: Hitachi Astemo, Ltd.
Inventor： Shinya MATOHARA , Yoshihiko AKAGI , Kazuhiro ORYOJI
Abstract: Provided is an internal combustion engine control device capable of appropriately correcting a flow rate of EGR gas. Therefore, an internal combustion engine control device 20 includes moisture amount calculation units 301 and 302, a dew condensation calculation unit 303, and an EGR correction unit 304. The moisture amount calculation unit 301 calculates a total moisture amount contained in the mixed gas. The dew condensation calculation unit 303 calculates a dew condensation generation amount WQcon in an intercooler based on the total moisture amount. The EGR correction unit 304 corrects a flow rate of the EGR gas based on the dew condensation generation amount WQcon.
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Patent Agency Ranking
公开(公告)号：US20250059899A1
公开(公告)日：2025-02-20
申请号：US18723711
申请日：2022-01-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI
Abstract: An internal combustion engine control device includes a correlation index estimation unit configured to estimate a piston temperature correlation index correlated with a temperature of a piston based on an internal combustion engine operating condition parameter and an oil jet parameter for injecting oil to a back surface of the piston; and a hydraulic pressure setting unit configured to set a hydraulic pressure of an oil jet based on the piston temperature correlation index and an evaporation parameter of fuel attached to the piston, wherein when the piston temperature correlation index is less than a first predetermined value determined based on a temperature corresponding to a fuel evaporable condition as the evaporation parameter, the hydraulic pressure setting unit sets the hydraulic pressure of the oil jet to a hydraulic pressure at which oil jet injection can be stopped.
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公开(公告)号：US20240229731A1
公开(公告)日：2024-07-11
申请号：US18562060
申请日：2022-02-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI
CPC classification number: F02D41/0077 , F02D41/009 , F02P5/1502 , F02D2200/024
Abstract: Provided is a control device for an internal combustion engine capable of realizing an operation of the internal combustion engine in a state in which a dilution is close to a limit. A processor (CPU 23a) of a control device for an internal combustion engine calculates a change amount of a parameter (for example, a combustion center position) indicating a combustion state of the internal combustion engine (combustion center change amount calculation unit 32). The processor (CPU 23a) corrects an operation amount of an actuator (for example, an EGR valve) that adjusts a dilution of an air-fuel mixture according to a difference between the change amount of the parameter indicating the combustion state and a target value of the change amount, and brings the change amount close to the target value (actuator operation amount correction unit 33).
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公开(公告)号：US20220268249A1
公开(公告)日：2022-08-25
申请号：US17595630
申请日：2020-06-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI , Takayasu MATSUSHITA
Abstract: Provided is an internal combustion engine control device capable of reducing a measurement load and calculating a flow velocity around an ignition plug. The internal combustion engine control device includes an inter-gap voltage calculation unit 31 and a flow velocity calculation unit 32. The inter-gap voltage calculation unit 31 calculates a reference inter-gap voltage under a reference condition, based on a secondary current and in-cylinder pressure. The flow velocity calculation unit calculates the flow velocity of a gas around the ignition plug based on the reference inter-gap voltage.
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公开(公告)号：US20220097712A1
公开(公告)日：2022-03-31
申请号：US17426207
申请日：2020-02-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Ragesh R , Shin YAMAUCHI , Kengo KUMANO , Kazuhiro ORYOJI
IPC: B60W30/194 , F02N11/08 , B60W20/16 , F02N19/02
Abstract: The present disclosure relates to a method and a control unit for controlling pre-warming process of an engine of a Hybrid Electric Vehicle (HEV). The method comprises determining start-up time of the engine. The method also comprises determining engine heating time for the engine. The pre-warming process of the engine is initiated prior to start up time of the engine. The process of pre-warming is discontinued when the determined start-up time of the engine is greater than the engine heating time and the process is restarted when the determined start-up time of the engine is less than the engine heating time and when the pre-warming process of the engine is discontinued. The above-mentioned process is reiterated at plurality of time intervals for controlling the pre-warming process of the engine which results in energy efficiency and sufficient heat for warm-up of the engine.
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公开(公告)号：US20230220807A1
公开(公告)日：2023-07-13
申请号：US18008621
申请日：2021-05-13
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI
CPC classification number: F02D35/026 , F02D29/02 , F02D35/027 , F02D2200/022 , F02D2200/0404 , F02D2200/0406 , F02D2200/0414 , F02D2200/0418 , F02D2200/0602 , F02D2200/101
Abstract: An internal combustion engine control device includes an engine state estimation unit, a wall surface temperature estimation unit, and an operation amount calculation unit. The engine state estimation unit calculates the energy transfer amount from the gas to the wall surface based on the parameter related to the operating condition, the parameter related to the chemical condition of combustion, and the parameter related to an operation status. The wall surface temperature estimation unit estimates the wall surface temperature on the basis of the energy transfer amount from the gas to the wall surface. The operation amount calculation unit calculates an operation amount of an actuator provided in the internal combustion engine on the basis of the wall surface temperature estimated by the wall surface temperature estimation unit.
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