公开(公告)号：US09297793B2

公开(公告)日：2016-03-29

申请号：US14186660

申请日：2014-02-21

Applicant: DENSO CORPORATION

Inventor： Masato Ueno ,  Jun Tarui

IPC: G01R27/26 ,  G01N33/28 ,  G01N27/22 ,  G01R17/16

CPC classification number: G01N33/2852 ,  G01N27/221 ,  G01N27/226 ,  G01N27/228 ,  G01R17/16 ,  G01R27/26 ,  G01R27/2605

Abstract: An electrode unit includes a first electrode and a second electrode, which define a space to flow fuel therethough. A detection circuit is connected to the first electrode to charge and discharge the electrode unit and to detect a capacitance of fuel, which flows through the space. A switch device is equipped to a wiring, which connects the second electrode with the ground, and configured to simulate disconnection between the second electrode and the ground. A malfunction detection unit is configured to detect disconnection of the wiring when a difference between a capacitance, which is detected with the detection circuit when the switch device is turned ON, and a capacitance, which is detected with the detection circuit when the switch device is turned OFF, is smaller than a first threshold.

Abstract translation: 电极单元包括第一电极和第二电极，其限定了用于在其中流动燃料的空间。 检测电路连接到第一电极以对电极单元进行充电和放电，并且检测流过该空间的燃料的电容。 开关装置配备有将第二电极与地线连接的布线，并且被配置为模拟第二电极和地之间的断开。 故障检测单元被配置为当开关装置接通时由检测电路检测到的电容与当开关装置为检测电路时检测到的电容之间的差异检测到布线的断开 关闭，小于第一阈值。

公开(公告)号：US20140312921A1

公开(公告)日：2014-10-23

申请号：US14186660

申请日：2014-02-21

Applicant: DENSO CORPORATION

Inventor： Masato Ueno ,  Jun Tarui

IPC: G01N27/22

CPC classification number: G01N33/2852 ,  G01N27/221 ,  G01N27/226 ,  G01N27/228 ,  G01R17/16 ,  G01R27/26 ,  G01R27/2605

Abstract: An electrode unit includes a first electrode and a second electrode, which define a space to flow fuel therethough. A detection circuit is connected to the first electrode to charge and discharge the electrode unit and to detect a capacitance of fuel, which flows through the space. A switch device is equipped to a wiring, which connects the second electrode with the ground, and configured to simulate disconnection between the second electrode and the ground. A malfunction detection unit is configured to detect disconnection of the wiring when a difference between a capacitance, which is detected with the detection circuit when the switch device is turned ON, and a capacitance, which is detected with the detection circuit when the switch device is turned OFF, is smaller than a first threshold.

Abstract translation: 电极单元包括第一电极和第二电极，其限定了用于在其中流动燃料的空间。 检测电路连接到第一电极以对电极单元进行充电和放电，并且检测流过空间的燃料的电容。 开关装置配备有将第二电极与地线连接的布线，并且被配置为模拟第二电极和地之间的断开。 故障检测单元被配置为当开关装置接通时由检测电路检测到的电容与当开关装置为检测电路时检测到的电容之间的差异检测到布线的断开 关闭，小于第一阈值。