公开(公告)号：US20160160783A1

公开(公告)日：2016-06-09

申请号：US14869460

申请日：2015-09-29

Applicant: DENSO CORPORATION

Inventor： Syohei FUJITA

IPC: F02D41/22 ,  F02M51/00

CPC classification number: F02D41/221 ,  F02D41/20 ,  F02D2041/2058 ,  F02D2041/224

Abstract: In an injector driving apparatus, a driving circuit supplies a current individually to each coil of multiple injectors, a current detection element detects the current flowing in a common current flow path, which is common to the coils, a current supply period guard part forcibly stops the current supplied from the driving circuit to the coil upon determination that a measured period reached a predetermined set period based on a detection result of the current detection element, and a diagnosis part operates in a period of no fuel injection to check whether the current supply period guard part normally stops the current supplied to the coil, by continuously supplying the current to the coil for only a short period, which disables the injector to open a valve, and sequentially switches over the coils.

Abstract translation: 在喷射器驱动装置中，驱动电路单独地向多个喷射器的各个线圈供给电流，电流检测元件检测在公共电流流路中流动的电流，这是线圈共有的电流供给周期保护部件强制停止 根据电流检测元件的检测结果，在判断为测定期间达到预定设定期间后，从驱动电路向线圈供给的电流，诊断部在无燃料喷射的期间内动作，检查电流供给 周期保护部分通常仅通过短时间内连续地向线圈供给电流来停止提供给线圈的电流，这使得喷射器不能打开阀，并且顺序地切换线圈。

公开(公告)号：US20180230924A1

公开(公告)日：2018-08-16

申请号：US15751272

申请日：2016-08-25

Applicant: DENSO CORPORATION

Inventor： Makoto TANAKA ,  Syohei FUJITA

IPC: F02D41/20 ,  F02D41/34 ,  F02D41/36 ,  F02D45/00 ,  F02M51/06

CPC classification number: F02D41/20 ,  F02D41/34 ,  F02D41/36 ,  F02D41/40 ,  F02D45/00 ,  F02D2041/1433 ,  F02D2041/2055 ,  F02D2041/2058 ,  F02D2200/0618 ,  F02M51/00 ,  F02M51/06 ,  F02M51/061 ,  F02M51/0675 ,  F02M61/10 ,  F16K31/0627 ,  Y02T10/44

Abstract: An injection control device controls a fuel injection valve driven by an electric power. The injection control device includes a current detection unit to detect a driving current supplied to a solenoid of the fuel injection valve, an identification unit to identify a theoretical model of the driving current in a state where a movable core moved by an electromagnetic force generated by the solenoid is at rest, and a state detection unit to detect a state of the movable core. The state detection unit detects the state of the movable core, based on a deviation between the driving current detected by the current detection unit and the theoretical model.