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    Failure test apparatus for fuel-vapor purging system
    5.
    发明授权
    Failure test apparatus for fuel-vapor purging system 失效
    燃油蒸气净化系统故障试验装置

    公开(公告)号：US06698280B1

    公开(公告)日：2004-03-02

    申请号：US09523362

    申请日：2000-03-10

    申请人： Noriyuki Iden ,  Tokiji Ito ,  Yuichi Kohara ,  Shuichi Hanai ,  Shin Adachi

    发明人： Noriyuki Iden ,  Tokiji Ito ,  Yuichi Kohara ,  Shuichi Hanai ,  Shin Adachi

    IPC分类号： F02M2508

    CPC分类号： F02M25/0818

    摘要： A failure test apparatus for a fuel-vapor purging system for adsorbing fuel vapor in a fuel tank into a canister and for purging fuel to an intake system of an internal combustion engine as needed. The purging system has at least one valve. A first test unit provides a differential pressure between the inside and the outside of the fuel-vapor purging system, measures the internal pressure with the fuel-vapor purging system in an airtight condition, and determines whether a leak exists in the fuel-vapor purging system from the behavior of the internal pressure. The test by the first test unit involves a differential-pressure forming process of creating a differential pressure between the inside and the outside of the fuel-vapor purging system, a sealing process of making the fuel-vapor purging system airtight when the differential pressure exists, and a differential-pressure releasing process for releasing the differential pressure. In association with one or more of the processes, a second test unit measures the internal pressure of the fuel-vapor purging system to detect a failure in any valve actuated in one of the processes based on the behavior of the internal pressure.

    摘要翻译： 一种燃料蒸汽净化系统的故障试验装置，用于将燃料箱中的燃料蒸气吸附到罐中并根据需要将燃料吹入内燃机的进气系统。 清洗系统具有至少一个阀。 第一测试单元在燃料 - 蒸汽清洗系统的内部和外部之间提供差压，在气密状态下用燃料 - 蒸气清洗系统测量内部压力，并且确定在燃料 - 蒸气吹扫中是否存在泄漏 系统从内部压力的行为。 第一测试单元的测试涉及在燃料蒸汽清除系统的内部和外部之间产生压差的差压成形过程，当存在压差时使燃料 - 蒸气吹扫系统气密的密封过程 ，以及用于释放差压的差压释放过程。 与一个或多个过程相关联，第二测试单元测量燃料 - 蒸汽清除系统的内部压力，以基于内部压力的行为检测在一个过程中致动的任何阀中的故障。

    Fault detection apparatus and method for fuel vapor purge system
    6.
    发明授权
    Fault detection apparatus and method for fuel vapor purge system 失效
    燃油蒸气净化系统故障检测装置及方法

    公开(公告)号：US06487892B1

    公开(公告)日：2002-12-03

    申请号：US09592295

    申请日：2000-06-12

    申请人： Tokiji Ito ,  Noriyuki Iden ,  Yuichi Kohara ,  Shuichi Hanai

    发明人： Tokiji Ito ,  Noriyuki Iden ,  Yuichi Kohara ,  Shuichi Hanai

    IPC分类号： G01M304

    CPC分类号： F02M25/0809

    摘要： A test apparatus for a fuel vapor purge system that performs frequent tests. The testing apparatus detects leakage of fuel vapor from a system passage by sealing the system passage and monitoring changes in the pressure. After the test, the apparatus applies atmospheric pressure to the system passage. Therefore, the pressure in the system passage is quickly restored to atmospheric pressure.

    摘要翻译： 用于进行频繁测试的燃料蒸气吹扫系统的测试装置。 测试装置通过密封系统通道并监测压力变化来检测来自系统通道的燃料蒸气的泄漏。 试验后，该装置向系统通道施加大气压力。 因此，系统通道中的压力迅速恢复到大气压力。

    Diagnosis apparatus for fuel vapor purge system
    7.
    发明授权
    Diagnosis apparatus for fuel vapor purge system 失效
    燃油蒸气净化系统诊断装置

    公开(公告)号：US06523398B1

    公开(公告)日：2003-02-25

    申请号：US09451098

    申请日：1999-11-30

    申请人： Shuichi Hanai ,  Shin Adachi ,  Tokiji Itoh ,  Yuichi Kohara ,  Noriyuki Iden

    发明人： Shuichi Hanai ,  Shin Adachi ,  Tokiji Itoh ,  Yuichi Kohara ,  Noriyuki Iden

    IPC分类号： G01M1900

    CPC分类号： F02M25/0809 ,  F02M25/089

    摘要： An improved diagnosis apparatus for detecting leakage of a fuel vapor purge system that purges fuel vapor from a fuel tank to an intake passage of an engine. The apparatus includes a pressure sensor and a purge valve. The pressure sensor detects the pressure in the purge system. The purge valve connects the purge system with the intake passage for lowering the purge system pressure to a predetermined pressure level. After the purge system pressure is lowered to the predetermined level, the purge system is sealed. The apparatus measures the rate of pressure change immediately after the purge system is sealed. The apparatus subsequently measures the rate of pressure change when the purge system pressure reaches a second reference pressure value and computes the ratio of the rates. The apparatus diagnoses whether there is a leak in the purge system based on the ratio and the rate of pressure change at the second reference pressure value.

    摘要翻译： 一种改进的诊断装置，用于检测从燃料箱向发动机的进气通道吹扫燃料蒸汽的燃料蒸气吹扫系统的泄漏。 该装置包括压力传感器和净化阀。 压力传感器检测吹扫系统中的压力。 吹扫阀将吹扫系统与进气通道连接，以将吹扫系统压力降低到预定压力水平。 在清洗系统压力降低到预定水平之后，清洗系统被密封。 该装置在吹扫系统被密封之后立即测量压力变化率。 该装置随后在吹扫系统压力达到第二参考压力值时测量压力变化率并计算速率的比率。 该装置基于第二参考压力值的比率和压力变化率来诊断吹扫系统中是否存在泄漏。

    Apparatus for evaluating deterioration condition of catalyst of internal combustion engine
    8.
    发明授权
    Apparatus for evaluating deterioration condition of catalyst of internal combustion engine 有权
    评价内燃机催化剂劣化状态的装置

    公开(公告)号：US07430853B2

    公开(公告)日：2008-10-07

    申请号：US10575950

    申请日：2004-12-27

    申请人： Yuichi Kohara ,  Takahiro Uchida

    发明人： Yuichi Kohara ,  Takahiro Uchida

    IPC分类号： F01N3/00

    CPC分类号： F01N11/007 ,  F01N13/009 ,  F01N13/0093 ,  F01N2550/02 ,  F01N2900/0422 ,  F02D41/1441 ,  F02D41/1474 ,  F02D41/1482 ,  F02D41/1495 ,  Y02T10/47

    摘要： To provide an apparatus for evaluating the deterioration condition of a catalyst of an internal combustion engine that can improve the accuracy of an evaluation of the deterioration condition of a catalyst and can suppress a worsening of emissions. The apparatus forcedly sets the air/fuel ratio upstream of a catalyst provided in an exhaust system of an internal combustion engine at a rich condition or a lean condition on the basis of a detected value of a sub O2 sensor downstream of the catalyst in the internal combustion engine and evaluates the deterioration condition of the catalyst. The air/fuel ratio control is reversed so that the air/fuel ratio upstream of the catalyst becomes a lean condition or a rich condition when ‘egasum’ has reached a predetermined value Ga, ‘egasum’ being an integrated value of an admitted air volume (an integration count of the amount of exhaust gas passing through the catalyst) in the period after the sub O2 sensor outputs a detected value, which shows a rich condition or a lean condition, until the reversing of the output of the sub O2 sensor.

    摘要翻译： 提供一种用于评价内燃机的催化剂的劣化条件的装置，其能够提高催化剂的劣化条件的评价的准确性，并且可以抑制排放的恶化。 该装置根据检测到的副O 2的检测值强制将设置在内燃机的排气系统中的催化剂上游的空气/燃料比设定在浓度条件或稀薄条件下。 传感器在内燃机中的催化剂下游，并评估催化剂的劣化状态。 空燃比控制相反，使得当“egasum”达到预定值Ga时，催化剂上游的空气/燃料比变成稀薄状态或浓缩状态，“egasum”是允许的空气量的积分值 （通过催化剂的废气量的积分计数）在O O 2传感器输出检测值之后的时段，其显示浓的条件或稀薄条件，直到反转 sub O 2传感器的输出。

    Apparatus for evaluating deterioration condition of catalyst of internal combustion engine
    9.
    发明申请
    Apparatus for evaluating deterioration condition of catalyst of internal combustion engine 有权
    评价内燃机催化剂劣化状态的装置

    公开(公告)号：US20070062177A1

    公开(公告)日：2007-03-22

    申请号：US10575950

    申请日：2004-12-27

    申请人： Yuichi Kohara ,  Takahiro Uchida

    发明人： Yuichi Kohara ,  Takahiro Uchida

    IPC分类号： F01N3/00 ,  F01N7/00

    CPC分类号： F01N11/007 ,  F01N13/009 ,  F01N13/0093 ,  F01N2550/02 ,  F01N2900/0422 ,  F02D41/1441 ,  F02D41/1474 ,  F02D41/1482 ,  F02D41/1495 ,  Y02T10/47

    摘要： To provide an apparatus for evaluating the deterioration condition of a catalyst of an internal combustion engine that can improve the accuracy of an evaluation of the deterioration condition of a catalyst and can suppress a worsening of emissions. The apparatus forcedly sets the air/fuel ratio upstream of a catalyst provided in an exhaust system of an internal combustion engine at a rich condition or a lean condition on the basis of a detected value of a sub O2 sensor downstream of the catalyst in the internal combustion engine and evaluates the deterioration condition of the catalyst. The air/fuel ratio control is reversed so that the air/fuel ratio upstream of the catalyst becomes a lean condition or a rich condition when ‘egasum’ has reached a predetermined value Ga, ‘egasum’ being an integrated value of an admitted air volume (an integration count of the amount of exhaust gas passing through the catalyst) in the period after the sub O2 sensor outputs a detected value, which shows a rich condition or a lean condition, until the reversing of the output of the sub O2 sensor.

    摘要翻译： 提供一种用于评价内燃机的催化剂的劣化条件的装置，其能够提高催化剂的劣化条件的评价的准确性，并且可以抑制排放的恶化。 该装置根据检测到的副O 2的检测值强制将设置在内燃机的排气系统中的催化剂上游的空气/燃料比设定在浓度条件或稀薄条件下。 传感器在内燃机中的催化剂下游，并评估催化剂的劣化状态。 空燃比控制相反，使得当“egasum”达到预定值Ga时，催化剂上游的空气/燃料比变成稀薄状态或浓缩状态，“egasum”是允许的空气量的积分值 （通过催化剂的废气量的积分计数）在O O 2传感器输出检测值之后的时段，其显示浓的条件或稀薄条件，直到反转 sub O 2传感器的输出。