中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

4 records (took 0.008 seconds)

    NOx CONCENTRATION MEASUREMENT SYSTEM
    1.
    发明申请
    NOx CONCENTRATION MEASUREMENT SYSTEM 审中-公开
    NOx浓度测量系统

    公开(公告)号：US20170045471A1

    公开(公告)日：2017-02-16

    申请号：US15305410

    申请日：2015-04-01

    Applicant: DENSO CORPORATION

    Inventor： Eriko MAEDA ,  Keigo MIZUTANI ,  Takehito KIMATA ,  Yuusuke TOUDOU

    IPC: G01N27/407 ,  G01N27/416

    CPC classification number: G01N27/407 ,  G01N27/4074 ,  G01N27/416 ,  G01N27/419

    Abstract: A NOx concentration measurement system has a NOx sensor, a detection section, a NH3 concentration estimation section and a calculation section. The NOx sensor measures a sum concentration c4 of a concentration of NOx (a concentration c1 of combustion derived NOx) in exhaust gas g, and a concentration of NO (concentration c3 of derived NO which has been derived from NH3) oxidized from NH3. The calculation section calculates the concentration c3 of derived NO by using a concentration c2 of NH3 contained in outside exhaust gas which is present around the NOx sensor, not inside of the NOx sensor, and at least one of an air fuel ratio A/F, a concentration of O2 and a concentration of H2O. The concentration c1 of the is calculated based on the sum concentration c4 and the concentration c3 of derived NO.

    Abstract translation: NOx浓度测定系统具有NOx传感器，检测部，NH 3浓度推定部和运算部。 NOx传感器测量排气g中的NOx浓度（燃烧得到的NOx的浓度c1）和从NH 3氧化的NO（源自NH 3的NO的浓度c3）的浓度的总和浓度c4。 计算部使用NO x传感器周围的NO x传感器周围的NOx排出浓度c2，而不是NOx传感器内部，计算出导出的NO的浓度c3，空气燃料比A / F， O2浓度和H2O浓度。 基于总浓度c4和导出的NO的浓度c3计算浓度c1。

    DETERIORATION DETERMINATION APPARATUS FOR AMMONIA SENSOR
    2.
    发明申请
    DETERIORATION DETERMINATION APPARATUS FOR AMMONIA SENSOR 有权

    公开(公告)号：US20210095611A1

    公开(公告)日：2021-04-01

    申请号：US17101542

    申请日：2020-11-23

    Applicant: DENSO CORPORATION

    Inventor： Satoshi NAKAMURA ,  Toshihiko HARADA ,  Kensuke TAKIZAWA ,  Eriko MAEDA ,  Hiroaki YOTO

    IPC: F02D41/22 ,  F01N3/20 ,  F02D41/14

    Abstract: A deterioration determination apparatus is usable with an ammonia sensor that includes an ammonia element portion that includes, a solid electrolyte, an ammonia electrode, and a reference electrode. The deterioration determining apparatus compares a first evaluation value and a second evaluation value, and determines whether deterioration has occurred in the ammonia element portion of the ammonia sensor at an evaluation time or subsequent to the evaluation time. The first evaluation value is based on a first sensor current obtained when a DC voltage is applied between the ammonia electrode and the reference electrode of the ammonia element portion at an initial time that is during an initial use period of the ammonia sensor. The second evaluation value is based on a second sensor current obtained when the DC voltage is applied between the ammonia electrode and the reference electrode subsequent to the initial period of use of the ammonia sensor.

    AMMONIA DETECTOR
    4.
    发明申请
    AMMONIA DETECTOR 有权

    公开(公告)号：US20210247354A1

    公开(公告)日：2021-08-12

    申请号：US17245784

    申请日：2021-04-30

    Applicant: DENSO CORPORATION

    Inventor： Eriko MAEDA ,  Takumi OKAMOTO ,  Hiroaki YOTO ,  Toshihiko HARADA

    IPC: G01N27/407

    Abstract: An ammonia detector includes a solid electrolyte body, a detection electrode, and a reference electrode. The solid electrolyte body includes a measured gas facing surface, which comes into contact with a measured gas, and a reference gas facing surface, which comes into contact with a reference gas. The detection electrode is formed on the measured gas facing surface of the solid electrolyte body. The reference electrode is formed on the reference gas facing surface of the solid electrolyte body. The detection electrode contains at least alumina and 50% or more by mass of Pd.

Patent Agency Ranking