公开(公告)号：US10408156B2

公开(公告)日：2019-09-10

申请号：US15775883

申请日：2016-11-29

Applicant: DENSO CORPORATION

Inventor： Keisuke Yanoto

IPC: F02D41/24 ,  F02D41/30 ,  F02M51/00 ,  F02D41/20 ,  F02M51/06 ,  F02D41/34 ,  F02M61/10

Abstract: A control device that is to output a driving signal to a fuel injector includes a full-lifting valve-closing response acquisition unit to acquire a full-lifting valve-closing profile indicating a valve-closing behavior of the fuel injector from a full-lifting state of a valve body constituting the fuel injector, based on a behavior of an electric signal from the full-lifting state to a closing state of the valve body, and a valve-opening response estimation unit to estimate a valve-opening profile indicating a valve-opening behavior when a valve-opening driving signal is input to the fuel injector, based on at least the full-lifting valve-closing profile.

公开(公告)号：US10125730B2

公开(公告)日：2018-11-13

申请号：US15568248

申请日：2016-03-30

Applicant: DENSO CORPORATION

Inventor： Keisuke Yanoto

IPC: F02M51/06 ,  F02D41/14 ,  F02D41/20 ,  F02D41/24 ,  F02D41/40 ,  F02D41/38

Abstract: An ECU as a fuel injection control device includes: an injector control part that energizes a magnetic circuit of a fuel injector by a specified injection pulse to thereby open the fuel injector and that energizes the magnetic circuit by a specified energization pulse within a range in which a needle valve of the fuel injector is not driven; and a storage part that stores information relating to a behavior of a drive voltage (minus terminal voltage) of the fuel injector when the magnetic circuit is energized by the injector control part by the specified energization pulse.

公开(公告)号：US09920704B2

公开(公告)日：2018-03-20

申请号：US15027334

申请日：2014-10-07

Applicant: DENSO CORPORATION

Inventor： Hiroshi Katsurahara ,  Nobuyuki Satake ,  Keisuke Yanoto

IPC: F02D41/00 ,  F02D41/24 ,  F02D41/20 ,  F02D41/14

CPC classification number: F02D41/247 ,  F02D41/1402 ,  F02D41/20 ,  F02D41/2467 ,  F02D2041/1432 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2200/0616

Abstract: At least after off of an injection pulse of partial lift injection, a difference between a first filtered voltage being a negative terminal voltage of a fuel injection valve filtered by a first low-pass filter and a second filtered voltage being the terminal voltage filtered by a second low-pass filter is calculated, and time from a predetermined reference timing to a timing when the difference between the filtered voltages has an inflection point is calculated as voltage inflection time. Subsequently, an injection quantity corresponding to current voltage inflection time is estimated for each of injection pulse widths with a relationship between the voltage inflection time and the injection quantity, the relationship being beforehand stored for each of the injection pulse widths. A map defining the relationship between the injection pulse width and the injection quantity is created based on a result of such estimation, and a required injection pulse width corresponding to a required injection quantity is calculated using the map.