公开(公告)号：US4121455A

公开(公告)日：1978-10-24

申请号：US821196

申请日：1977-08-02

申请人： Robert Alan Haslett ,  Charles Peter Howard ,  Richard Winston Wheeler

发明人： Robert Alan Haslett ,  Charles Peter Howard ,  Richard Winston Wheeler

IPC分类号： G01F1/704 ,  G01M15/04 ,  G01F1/70

CPC分类号： G01F1/704

摘要： In measuring the mass flow rate of the inlet air entering an internal combustion engine or other combustion device, or of the exhaust gas discharged therefrom, a constant metered flow of helium or other inert tracer gas is introduced through a temperature-controlled critical flow orifice into the air intake of the engine or device, and the exhaust gas is continuously sampled and the sample analyzed by means of a mass spectrometer. From the measurement of the concentration of the tracer gas in the exhaust gas sample provided by the mass spectrometer, the required mass flow rate is derived and displayed. The mass spectrometer may be employed to measure in sequence the concentrations of other constituents of the exhaust gas sample as well as that of the tracer gas, and from these measurements other parameters related to the mass flow rate of intake air may be derived by means of a microprocessor, and displayed.

摘要翻译： 在测量进入内燃机或其他燃烧装置的入口空气或从其排出的废气的质量流量时，将恒定的氦气或其他惰性示踪气体的流量通过温度控制的临界流量孔引入 发动机或装置的进气口和废气被连续采样，并通过质谱仪分析样品。 从质谱仪提供的排气样品中的示踪气体的浓度的测量中，导出并显示所需的质量流量。 可以使用质谱仪来依次测量废气样品和示踪气体的其它组分的浓度，并且根据这些测量，与进气的质量流量相关的其它参数可以通过 一个微处理器，并显示。

公开(公告)号：US5788832A

公开(公告)日：1998-08-04

申请号：US683985

申请日：1996-07-19

申请人： Charles Peter Howard ,  Naim Akmal

发明人： Charles Peter Howard ,  Naim Akmal

IPC分类号： G01N27/26 ,  G01N27/404 ,  G01N27/49

CPC分类号： G01N27/404

摘要： An electrochemical gas sensor having a temperature sensitive element such as a thermistor arranged within the gas sensor in a temperature insulative fashion for preventing any variations in the temperature of the applied gases to be sensed to be immediately conveyed to the temperature sensitive element thereby providing accurate temperature compensation signals to be combined with the generated sensor electrical output signals. The temperature sensitive element or thermistor is mounted in a heat sink to the expansion membrane of the gas sensor to be responsive only to changes in the temperature variations imparted by the sensor electrolyte and not by the variations in the temperature of the gas sensor body and associated elements thereby providing correct temperature compensation signals without error producing time delays.

摘要翻译： 一种电化学气体传感器，其具有温度敏感元件，例如热敏电阻器，其以温度绝缘方式布置在气体传感器内，用于防止待检测的施加气体的温度的任何变化立即传送到温度敏感元件，从而提供精确的温度 补偿信号与所生成的传感器电输出信号组合。 温度敏感元件或热敏电阻安装在散热器到气体传感器的膨胀膜上，以仅响应于由传感器电解质产生的温度变化的变化，而不是由气体传感器主体的温度变化和相关的 从而提供正确的温度补偿信号，而不产生错误的时间延迟。