公开(公告)号：US20160245202A1

公开(公告)日：2016-08-25

申请号：US15027834

申请日：2014-10-06

Applicant: DENSO CORPORATION

Inventor： Hiroyuki FUKUDA ,  Akihiro OKAMOTO ,  Ryohei TAKAHASHI

IPC: F02D41/00 ,  F02D41/26 ,  F02D41/40

CPC classification number: F02D41/0085 ,  F02D41/2448 ,  F02D41/2467 ,  F02D41/26 ,  F02D41/3845 ,  F02D41/40 ,  F02D2200/0602 ,  F02M63/0225 ,  Y02T10/44

Abstract: It is determined whether the execution conditions for the injection quantity variation correction are met, based on whether all of following conditions are satisfied: the engine operation is the stationary operation, the injection quantity of a fuel injection valve falls within the predetermined range, and the fuel pressure falls within the predetermined range. When the execution conditions are met, the fuel pressure decrease caused by the fuel injection of the fuel injection valve for each cylinder is calculated based on the output of a fuel pressure sensor, and the injection quantity variation correction to correct the injection quantity variation of the fuel injection valve for each cylinder is performed based on the fuel pressure decrease caused by the fuel injection of each cylinder. Thus, the fuel pressure decrease can be accurately calculated, the injection quantity variation of each cylinder is precisely corrected.

Abstract translation: 基于是否满足以下所有条件来确定是否满足喷射量变化校正的执行条件：发动机操作是静止操作，燃料喷射阀的喷射量落在预定范围内，并且 燃料压力落在预定范围内。 当满足执行条件时，基于燃料压力传感器的输出计算由每个气缸的燃料喷射阀的燃料喷射引起的燃料压力降低，并且喷射量变化校正以校正喷射量变化 基于由每个气缸的燃料喷射引起的燃料压力降低执行每个气缸的燃料喷射阀。 因此，可以精确地计算燃料压力的降低，精确地校正各气缸的喷射量变化。

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.