公开(公告)号：US20150275804A1

公开(公告)日：2015-10-01

申请号：US14670367

申请日：2015-03-26

Applicant: HONDA MOTOR CO., LTD.

Inventor： Yuki TAKANO ,  Ryosuke IBATA ,  Tetsuya KANEKO ,  Takahiro KITAMURA ,  Tsuyoshi TAKIZAWA ,  Shunji AKAMATSU

IPC: F02D41/14 ,  F02D41/00 ,  F02D41/30

CPC classification number: F02D41/1495 ,  F02D41/003 ,  F02D41/0037 ,  F02D41/1456 ,  F02D41/22 ,  F02D41/30 ,  F02D2041/224 ,  F02D2041/228 ,  F02M25/089 ,  Y02T10/40

Abstract: A diagnosis apparatus of a fuel supply system includes an operation state detector, an air-fuel ratio sensor, a fuel injection amount calculator, a threshold value table, an abnormality information acquiring device, and an abnormality determining device. In the threshold value table, operation ranges of an internal combustion engine are provided based on an engine speed and a throttle opening. In the threshold value table, a lean side threshold value and a rich side threshold value of an air-fuel ratio correction factor to determine abnormality of the fuel supply system are set beforehand for each of the operation ranges. The abnormality information acquiring device is configured to determine whether the air-fuel ratio correction factor has exceeded the lean side threshold value or the rich side threshold value extracted from the threshold value table according to an operation state so as to acquire abnormality information.

Abstract translation: 燃料供给系统的诊断装置包括操作状态检测器，空燃比传感器，燃料喷射量计算器，阈值表，异常信息获取装置和异常判定装置。 在阈值表中，基于发动机转速和节气门开度来设置内燃机的运转范围。 在阈值表中，针对每个操作范围预先设定用于确定燃料供给系统的异常的空燃比校正因子的倾斜侧阈值和浓侧阈值。 异常信息获取装置被配置为根据操作状态来确定空燃比校正因子是否超过从阈值表提取的瘦侧阈值或浓侧阈值，以获取异常信息。