公开(公告)号：US20200088124A1

公开(公告)日：2020-03-19

申请号：US16693745

申请日：2019-11-25

Applicant: DENSO CORPORATION

Inventor： Keisuke YANOTO ,  Kazuya KOGO ,  Hatsumi TAKEUCHI

IPC: F02D41/40

Abstract: An ECU opens a valve element to inject fuel in conjunction with energization of a fuel injection valve provided for an engine. The ECU includes an injection control unit, a characteristic acquisition unit, and a fuel injection correction unit. The injection control unit implements a partial-lift injection during which the valve element does not reach a full-lift position to open the fuel injection valve by an energization time. The characteristic acquisition unit acquires an actual lifting behavior of the valve element as an actual lift characteristic when the partial-lift injection is implemented. The fuel injection correction unit compares the actual lift characteristic acquired by the characteristic acquisition unit with a predetermined reference characteristic and corrects a fuel injection quantity in the partial-lift injection based on a result of the comparison.

公开(公告)号：US20180112618A1

公开(公告)日：2018-04-26

申请号：US15567736

申请日：2016-03-30

Applicant: DENSO CORPORATION

Inventor： Keisuke YANOTO

IPC: F02D41/30

CPC classification number: F02D41/30 ,  F01L9/04 ,  F02D41/20 ,  F02D2041/2013 ,  F02D2041/2027 ,  F02D2041/2034 ,  F02D2041/2051 ,  F02D2041/2058 ,  F02D2200/06 ,  F16K31/06 ,  H01F7/18

Abstract: A control apparatus, which controlling an operation of an injector provided to an internal combustion engine, includes: a voltage application unit applying a voltage raised to have a step-up target value to the injector to open the injector; a current measurement unit measuring a drive current supplied to the injector in response to an application of the voltage; and a calculator calculating a current difference value which indicates a difference between an actually-measured profile and a reference profile. The actually-measured profile indicates a time-variation in an actually-measured value of the drive current, and the reference profile is a profile set in advance. The step-up target value is corrected according to the current difference value that is calculated.

公开(公告)号：US20170226951A1

公开(公告)日：2017-08-10

申请号：US15514834

申请日：2015-09-28

Applicant: DENSO CORPORATION

Inventor： Keisuke YANOTO

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

CPC classification number: F02D41/2467 ,  F02D41/20 ,  F02D2041/2003 ,  F02D2041/202 ,  F02D2041/2055 ,  F02D2041/2058 ,  F02M51/00 ,  F02M51/061 ,  F02M63/0007 ,  F02M63/0017

Abstract: An ECU calculates peak-current arrival time (time elapsed before a detected current arrives at a target peak current), and calculates predetermined-current arrival difference time (time elapsed before the detected current becomes lower than a predetermined current after exceeding the predetermined current). The ECU uses a beforehand stored relationship between the predetermined-current arrival difference time and defined peak-current arrival time to calculate the defined peak-current arrival time corresponding to the latest predetermined-current arrival difference time. The ECU uses such defined peak-current arrival time to compare the latest peak-current arrival time with the defined peak-current arrival time (for example, calculates a difference between the peak-current arrival time and the defined peak-current arrival time), and thus determines a shift in detected current of a current detection circuit.