Portable electrometric apparatus for roadside analysis of automotive
exhaust emission
    1.
    发明授权
    Portable electrometric apparatus for roadside analysis of automotive exhaust emission 失效
    便携式电动仪器,用于汽车废气排放的路边分析

    公开(公告)号:US5831742A

    公开(公告)日:1998-11-03

    申请号:US659328

    申请日:1996-06-06

    IPC分类号: G01N21/78 G01J3/08

    CPC分类号: G01N21/783

    摘要: A method and apparatus for instantaneously measuring the level of carbon dioxide (and other gases) in automotive combustion exhaust analysis is provided in the form of a portable battery driven roadside diagnostic instrument in which the CO.sub.2 level is measured by a calorimetric technique utilizing light as the energy source and a piezoelectric bimorph to vibrate a single fiber-optic element to multiplex between two fiber-optic receptors delivering the light to a measurement cell and a reference cell. The measurement cell comprises a salt of an acid-base indicator dye which provides proportional color change on contact with CO.sub.2. The dye is supported on a polymetric film in the cell.

    摘要翻译: 以便携式电池驱动的路边诊断仪器的形式提供用于瞬时测量汽车燃烧排气分析中的二氧化碳(和其他气体)的水平的方法和装置,其中通过使用光作为测量的量热技术来测量CO 2水平 能量源和压电双压电晶片,以振动单个光纤元件以将两个光纤传感器之间的光纤传递到测量单元和参考单元。 测量单元包括酸碱指示剂染料的盐,其在与CO 2接触时提供成比例的颜色变化。 染料负载在电池中的聚甲醛膜上。

    Method and apparatus for analysis of particulate content of gases
    3.
    发明授权
    Method and apparatus for analysis of particulate content of gases 失效
    用于分析气体颗粒物含量的方法和装置

    公开(公告)号:US5892141A

    公开(公告)日:1999-04-06

    申请号:US753105

    申请日:1996-11-20

    摘要: A method and apparatus for analysis of particulate content of gases, applicable to the quantitative and qualitative analysis of vehicle engine emissions, includes sampling, removing particles and analysis of the removed particles. Sampling is effected by electrostatic precipitation using a catalyst-coated piezoelectric crystal. The analysis of the removed particles is effected by heating the crystal in an oxidizing atmosphere to oxidize the deposited particles. Connection of the crystal to an oscillation circuit enables the frequency of oscillation of the crystal to be monitored. Changes in the frequency of oscillation are interpreted to provide quantitative and qualitative analysis of particles deposited and subsequently oxidized.

    摘要翻译: 用于分析气体颗粒物含量的方法和装置,适用于车辆发动机排放的定量和定性分析,包括取样,除去颗粒和分离除去的颗粒。 使用催化剂涂覆的压电晶体通过静电沉淀实现取样。 去除的颗粒的分析通过在氧化气氛中加热晶体以氧化沉积的颗粒来实现。 将晶体连接到振荡电路可以监测晶体的振荡频率。 解释振荡频率的变化可提供定量和定性分析沉积并随后被氧化的颗粒。

    Method and apparatus for analyzing catalyst and other systems operations
    4.
    发明授权
    Method and apparatus for analyzing catalyst and other systems operations 失效
    用于分析催化剂和其他系统操作的方法和装置

    公开(公告)号:US5869743A

    公开(公告)日:1999-02-09

    申请号:US797881

    申请日:1997-02-10

    摘要: A method of analyzing exhaust gas emissions from an internal combustion engine is modified by the provision of a data process or connected to an exhaust gas analyzer and adapted to monitor changes in exhaust gas concentrations and to identify changes indicative of the state of operation of a catalytic system provided in the engine exhaust delivery system. The catalyst-on condition is identified by reference to the characteristic shape of the plot of the gas concentrations against time. Similar identification of catalyst-off conditions is provided by corresponding analysis of concentration changes and concentration values. The system can distinguish between various causes of the catalyst-off condition.

    摘要翻译: 通过提供数据处理或连接到废气分析器来调节来自内燃机的废气排放的分析方法,该方法适用于监测废气浓度的变化并且识别指示催化剂的运行状态的变化 在发动机排气系统中提供的系统。 通过参考气体浓度对时间图的特征形状来确定催化剂开启条件。 通过对浓度变化和浓度值的相应分析提供催化脱除条件的相似鉴定。 该系统可以区分催化剂脱离状态的各种原因。