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公开(公告)号：US20220016658A1
公开(公告)日：2022-01-20
申请号：US17375984
申请日：2021-07-14
Applicant: DENSO CORPORATION
Inventor： Kosuke KATO , Hiroyuki FUKUDA , Yasumasa ISHIKAWA
IPC: B05B12/00 , G05B19/042 , F02D41/38 , F02D41/20
Abstract: An injection control device for a fuel injection valve includes: a current detection unit; and a current area correction control unit that corrects, based on an energization current profile, an area correction amount of an energization time to equalize the integrated current value of the energization current profile and an integrated current value of the detected current, and obtains the integrated current value of the current based on an attainment time from a start of energization of the fuel injection valve to an attainment of each of a plurality of reference current values; a storage unit that stores a reference attainment time; and a reference current value correction unit that corrects each reference current value based on a difference between the reference attainment time and a detected attainment time at a time of actual drive.
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公开(公告)号：US20210404405A1
公开(公告)日：2021-12-30
申请号：US17357276
申请日：2021-06-24
Applicant: DENSO CORPORATION
Inventor： Yuki KATO , Yohei SUGANUMA , Hiroyuki FUKUDA
Abstract: In a current-driving of a fuel injection valve to inject fuel through a single injection or a multi-stage injection, an energization time correction amount is calculated by performing area correction on a current flowing through the fuel injection valve. The single injection is switched to the multi-stage injection when the single injection is consecutively performed under a predetermined condition.
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公开(公告)号：US20220090556A1
公开(公告)日：2022-03-24
申请号：US17476239
申请日：2021-09-15
Applicant: DENSO CORPORATION
Inventor： Kosuke KATO , Hiroyuki FUKUDA , Yasumasa ISHIKAWA
Abstract: An injection control device controls fuel injection to an internal-combustion engine by driving a fuel injection valve with an electric current to open and close the valve. The injection control device includes a boost circuit boosting a battery voltage; a boost controller controlling the boosting of the boost circuit; and a charge control setter setting charge permission or charge prohibition of the boost circuit to the boost controller. The charge control setter sets the charge permission or charge prohibition of the boost circuit to the boost controller according to a magnitude of an influence of a drive current error.
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公开(公告)号：US20220090555A1
公开(公告)日：2022-03-24
申请号：US17476018
申请日：2021-09-15
Applicant: DENSO CORPORATION
Inventor： Keisuke TAKAYA , Hiroyuki FUKUDA , Kosuke KATO
Abstract: An injection control device opens and closes a fuel injection valve by driving the fuel injection valve with a current to control fuel injection to an internal combustion engine. The injection control device includes: a booster circuit that boosts a battery voltage; a boosting control unit that performs boosting control on the booster circuit; and a charge control setting unit that sets charge permission or charge prohibition for the booster circuit to the boosting control unit.
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公开(公告)号：US20170284389A1
公开(公告)日：2017-10-05
申请号：US15510387
申请日：2015-09-01
Applicant: DENSO CORPORATION
Inventor： Hiroyuki FUKUDA
CPC classification number: F04B49/22 , F02D41/3845 , F02D2041/2027 , F02D2041/2037 , F02D2041/2048 , F02D2041/2058 , F02D2200/0602 , F02M59/025 , F02M59/366 , F02M59/368 , F02M59/466 , F04B19/22 , F04B53/001 , F04B53/14 , F04B53/16
Abstract: A control device includes a plurality of sound reducing parts that is operated individually, when a predetermined condition for operation is met, at each of a plurality of timings when an operating sound is generated as a result of a movement of a valve body, in one open-and-close period, and that reduces the operating sound, at each of the plurality of the timings, by changing a period of energizing an electromagnetic part to an increase side relative to a normal time, an upper limit determination part that determines whether a required period of energizing the electromagnetic part in the one open-and-close period exceeds a predetermined upper limit value, when all the plurality of the sound reducing parts are operated, and a selectively operating part that selects and operates one or more of the plurality of the sound reducing parts to an extent that the required period of energizing does not exceed the upper limit value, when the upper limit determination part has determined that the required period of energizing exceeds the upper limit value.
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Patent Agency Ranking
公开(公告)号：US20220018301A1
公开(公告)日：2022-01-20
申请号：US17375918
申请日：2021-07-14
Applicant: DENSO CORPORATION
Inventor： Kosuke KATO , Hiroyuki FUKUDA , Yasumasa ISHIKAWA
Abstract: An injection control device for a fuel injection valve includes: a current detection unit of the fuel injection valve; a current area correction control unit that performs current area correction for an area correction amount of an energization time to equalize the integrated current value of the energization current profile and an integrated current value of the detected current; and an information correction unit that learns and stores a reference attainment time, from a start of energization to an attainment of each of the plurality of reference currents, in a storage unit, and corrects information related to the current area correction based on a difference between the reference attainment time and an actual attainment time from the start of energization to the attainment of each reference current.
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公开(公告)号：US20160245202A1
公开(公告)日：2016-08-25
申请号：US15027834
申请日：2014-10-06
Applicant: DENSO CORPORATION
Inventor： Hiroyuki FUKUDA , Akihiro OKAMOTO , Ryohei TAKAHASHI
CPC classification number: F02D41/0085 , F02D41/2448 , F02D41/2467 , F02D41/26 , F02D41/3845 , F02D41/40 , F02D2200/0602 , F02M63/0225 , Y02T10/44
Abstract: It is determined whether the execution conditions for the injection quantity variation correction are met, based on whether all of following conditions are satisfied: the engine operation is the stationary operation, the injection quantity of a fuel injection valve falls within the predetermined range, and the fuel pressure falls within the predetermined range. When the execution conditions are met, the fuel pressure decrease caused by the fuel injection of the fuel injection valve for each cylinder is calculated based on the output of a fuel pressure sensor, and the injection quantity variation correction to correct the injection quantity variation of the fuel injection valve for each cylinder is performed based on the fuel pressure decrease caused by the fuel injection of each cylinder. Thus, the fuel pressure decrease can be accurately calculated, the injection quantity variation of each cylinder is precisely corrected.
Abstract translation: 基于是否满足以下所有条件来确定是否满足喷射量变化校正的执行条件：发动机操作是静止操作，燃料喷射阀的喷射量落在预定范围内，并且 燃料压力落在预定范围内。 当满足执行条件时，基于燃料压力传感器的输出计算由每个气缸的燃料喷射阀的燃料喷射引起的燃料压力降低，并且喷射量变化校正以校正喷射量变化 基于由每个气缸的燃料喷射引起的燃料压力降低执行每个气缸的燃料喷射阀。 因此，可以精确地计算燃料压力的降低，精确地校正各气缸的喷射量变化。
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公开(公告)号：US20220090554A1
公开(公告)日：2022-03-24
申请号：US17475855
申请日：2021-09-15
Applicant: DENSO CORPORATION
Inventor： Keisuke TAKAYA , Hiroyuki FUKUDA , Kosuke KATO
IPC: F02D41/20
Abstract: An injection control device includes: a booster circuit that boosts a battery voltage; a boosting control unit that performs boosting control on the booster circuit; a charge control setting unit that sets a charge prohibition time of the booster circuit for the boosting control unit; and a maximum time specification unit that specifies a maximum valve-closing detection time based on a valve-closing detection time.
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公开(公告)号：US20220082060A1
公开(公告)日：2022-03-17
申请号：US17473706
申请日：2021-09-13
Applicant: DENSO CORPORATION
Inventor： Tomoki MORI , Kosuke KATO , Hiroyuki FUKUDA , Yohei SUGANUMA
Abstract: An injection control device includes: an arithmetic unit that obtains a valve-closing time for stopping injection of fuel from a fuel injection valve based on a degree of variation in a time change of a voltage generated when the fuel injection valve is driven based on a required injection amount; an injection amount change unit that increases or decreases the required injection amount; and a learning unit that repeats injection control of the fuel to learn the valve-closing time obtained by the arithmetic unit.
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公开(公告)号：US20210372338A1
公开(公告)日：2021-12-02
申请号：US17331212
申请日：2021-05-26
Applicant: DENSO CORPORATION
Inventor： Yohei SUGANUMA , Ryohei TAKAHASHI , Hiroyuki FUKUDA , Masashi INABA
Abstract: An injection control device includes: a conversion coefficient setter setting a conversion coefficient for each injection when a fuel injection valve is driven by an electric current to inject fuel from the fuel injection valve; and an area correction unit calculating an energization time correction amount by performing area correction using the conversion coefficient for each injection regardless of whether a drive current of the fuel injection valve has reached a target peak current or not.
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