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

IPC: F02D41/20 ,  F02D41/24 ,  F02D41/26

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.

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

IPC: F02D41/20 ,  F02D41/24

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.

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

IPC: F02D41/20 ,  F02D41/22

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.

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.

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.

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

IPC: F02D41/40 ,  F02D41/24

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.