发明名称 |
METHODS AND APPARATUS FOR MEASURING NOX GAS CONCENTRATION, FOR DETECTING EXHAUST GAS CONCENTRATION AND FOR CALIBRATING AND CONTROLLING GAS SENSOR |
摘要 |
A nitrogen oxide concentration detector has a first measurement chamber 2 into which is introduced a measurement gas via a first diffusion resistance 1; an oxygen concentration detection electrode 7a for measuring the oxygen concentration in the measurement gas in said first measurement chamber 1; a first oxygen ion pump cell 6 for pumping out oxygen in the measurement gas from said first measurement chamber 2 based on the potential of said oxygen concentration detection electrode 7a; a second measurement chamber 8 into which the gas is introduced from said first measurement chamber 2 via a second diffusion resistance 3; and a second oxygen ion pump cell 8 having a pair of electrodes 8a,8b across which a voltage is applied to decompose NOx in the second measurement chamber 4 to pump out dissociated oxygen to cause a current Ip2 corresponding to the NOx concentration to flow in the second oxygen ion pump cell 8. Variation of NOx concentration is a function of variation of Ip2. The concentration obtained based on the Ip2 is corrected responsive to the oxygen concentration in the measurement gas. Particularly, a coefficient of the variation of the Ip2, gain, in said function is corrected responsive to the oxygen concentration in the measurement gas.
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申请公布号 |
US2002017467(A1) |
申请公布日期 |
2002.02.14 |
申请号 |
US19980045938 |
申请日期 |
1998.03.23 |
申请人 |
ANDO MASASHI;ISHIDA NOBORU;SUGAYA SATOSHI;OSHIMA TAKAFUMI;NADANAMI NORIHIKO;OTSUKA TAKAKI;SATO YOSHIKUNI;OKUMURA TATSUO;KUZUYA YASUHISA |
发明人 |
ANDO MASASHI;ISHIDA NOBORU;SUGAYA SATOSHI;OSHIMA TAKAFUMI;NADANAMI NORIHIKO;OTSUKA TAKAKI;SATO YOSHIKUNI;OKUMURA TATSUO;KUZUYA YASUHISA |
分类号 |
F01N3/08;F01N3/20;F01N11/00;F02D41/14;F02D41/24;G01N27/417;G01N27/419;G01N33/00;(IPC1-7):G01N27/407 |
主分类号 |
F01N3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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