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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
申请人： Hitachi Astemo, Ltd.
发明人： Kazuhiro ORYOJI , Yoshihiko AKAGI , Ryutaro KOIWAI
摘要： 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：US20220235719A1
公开(公告)日：2022-07-28
申请号：US17596433
申请日：2020-06-23
申请人： Hitachi Astemo, Ltd.
摘要： 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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公开(公告)号：US20220145819A1
公开(公告)日：2022-05-12
申请号：US17581584
申请日：2022-01-21
申请人： Hitachi Astemo, Ltd.
发明人： Yoshihiko AKAGI
摘要： Provided is a signal processing device capable of effectively reducing a work load of a parameter setting operator in response to an increase in parameters constituting complicated filter control. Therefore, in the signal processing device filters an output signal from a sensor mounted on a vehicle, setting is made with respect to a plurality of filters having different filter types or filter coefficients for setting a filter characteristic of a cutoff frequency or a pass band, an individual code is set for each of the plurality of filters, and the signal processing device includes a CPU that selects the individual code based on an engine operating state so that a corresponding filter is selected, and processes an output signal from the sensor using the filter that has been selected.
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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
申请人： Hitachi Astemo, Ltd.
发明人： Kazuhiro ORYOJI , Yoshihiko AKAGI , Hidefumi IWAKI
摘要： 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：US20240229731A1
公开(公告)日：2024-07-11
申请号：US18562060
申请日：2022-02-02
申请人： Hitachi Astemo, Ltd.
发明人： Kazuhiro ORYOJI , Yoshihiko AKAGI
CPC分类号： F02D41/0077 , F02D41/009 , F02P5/1502 , F02D2200/024
摘要： 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：US20240218840A1
公开(公告)日：2024-07-04
申请号：US18557767
申请日：2022-02-02
申请人： Hitachi Astemo, Ltd.
CPC分类号： F02D9/1035 , F02D11/10 , F02D2011/101
摘要： An object of the present application invention is to provide a throttle valve control device capable of effectively cooling a bearing of a throttle shaft while preventing an increase in size of a throttle body. Therefore, in a throttle valve control device in which flow paths 5T1 to 5T3 through which a heat exchange medium flows are formed in a throttle body 5, the diameter of a first bearing 8 of a throttle shaft 3 is greater than the diameter of a second bearing 9, the flow paths 5T1 to 5T3 are disposed along an outer periphery of an intake passage 1 to overlap with the second bearing 9 when viewed from a flow direction of the intake passage 1, and an inlet portion 5T1 and the outlet portion 5T3 of the flow paths 5T1 to 5T3 are disposed to sandwich the first bearing 8.
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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
申请人： Hitachi Astemo, Ltd.
摘要： 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：US20230220807A1
公开(公告)日：2023-07-13
申请号：US18008621
申请日：2021-05-13
申请人： Hitachi Astemo, Ltd.
发明人： Kazuhiro ORYOJI , Yoshihiko AKAGI
CPC分类号： F02D35/026 , F02D29/02 , F02D35/027 , F02D2200/022 , F02D2200/0404 , F02D2200/0406 , F02D2200/0414 , F02D2200/0418 , F02D2200/0602 , F02D2200/101
摘要： 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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