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

IPC: F02D41/20 ,  F02D41/40

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.

公开(公告)号：US20220034278A1

公开(公告)日：2022-02-03

申请号：US17386201

申请日：2021-07-27

Applicant: DENSO CORPORATION

Inventor： Minori KANEDA ,  Yohei SUGANUMA ,  Akira TACHIKI

IPC: F02D41/40 ,  F02D41/22

Abstract: An injection control device includes: an instruction output unit outputting an instruction energization time that is an instruction value of an energization time of a fuel injection valve corresponding to a target injection amount; an energization controller controlling energization of the fuel injection valve based on the instruction energization time; an area corrector correcting an area of an electric current flowing through the fuel injection valve when the fuel injection valve is driven by the electric current, calculating a correction time of the energization time, and correcting the instruction energization time; an abnormality determiner determining that an abnormality related to the area correction has occurred when the correction time reaches a predetermined upper limit value; and a normal-return determiner executing, after the abnormality determiner determines that the abnormality related to the area correction has occurred, a normal-return determination at an execution timing of when a degree of influence of the abnormality on an emission becomes equal to or less than a predetermined value, for determining whether or not an abnormal state in which the abnormality related to the area correction has been caused has returned to a normal state.

公开(公告)号：US20220034277A1

公开(公告)日：2022-02-03

申请号：US17386769

申请日：2021-07-28

Applicant: DENSO CORPORATION

Inventor： Ryo FUKAYA ,  Yohei SUGANUMA

IPC: F02D41/20 ,  F02D41/40

Abstract: An injection control device includes a control IC that obtains, as sample data, a time change of a voltage generated when a fuel injection valve is driven, and determines a valve closing timing at which injection of fuel from the fuel injection valve is stopped by calculating a degree of variation from the sample data of the voltage. Further, the control IC changes the calculation of the degree of variation when a predetermined condition is satisfied.

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.

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

IPC: F02D41/20 ,  F02M51/06 ,  F02D41/24

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.