公开(公告)号：US06176125B1

公开(公告)日：2001-01-23

申请号：US09012746

申请日：1998-01-23

申请人： Takashi Hirano ,  Masayuki Adachi ,  Minoru Shimooka ,  Kazuki Makimura

发明人： Takashi Hirano ,  Masayuki Adachi ,  Minoru Shimooka ,  Kazuki Makimura

IPC分类号： G01M1500

CPC分类号： G01F1/704 ,  G01M15/104

摘要： An exhaust gas flow rate measuring equipment for internal combustion engines supplies helium gas only to a trace gas analyzer. The condition in which the inside of the trace gas analyzer in the high-vacuum stage causes pressure fluctuation due to the viscosity of the exhaust gas and the introduction rate of helium gas fluctuates in proportion to the fluctuation rate can be prevented. Also the, problem of the sensitivity varying in accordance with the gas component ratio in the exhaust gas can be solved.

摘要翻译： 用于内燃机的废气流量测量设备仅向痕量气体分析仪提供氦气。 高真空级的痕量气体分析装置的内部由于排气的粘度引起的压力波动和氦气的导入率与变动率成比例地变动的状态。 此外，可以解决根据废气中的气体成分比率而变化的灵敏度的问题。