US 7,320,746 B2 | ||
Concentration detector | ||
Yoshihiro Sakayanagi, Susono (Japan) | ||
Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota (Japan) | ||
Filed on Jul. 27, 2004, as Appl. No. 10/899,122. | ||
Claims priority of application No. 2003-208060 (JP), filed on Aug. 20, 2003. | ||
Prior Publication US 2005/0040041 A1, Feb. 24, 2005 | ||
Int. Cl. G01N 27/41 (2006.01) |
U.S. Cl. 204—425 [204/426; 205/781; 73/23.31] | 5 Claims |
1. A concentration detector for detecting the concentration of a particular component in a gas, which component forms oxygen
by decomposition, based upon the amount of oxygen formed by the decomposition of the particular component, comprising:
an oxygen-forming unit that forms oxygen by decomposing the particular component;
an oxygen-discharging unit that discharges oxygen from the gas before oxygen is formed by the oxygen-forming unit;
an oxygen-discharging capability-increasing unit that increases the oxygen-discharging capability of the oxygen-discharging
unit when the rate of increase of the oxygen concentration in the gas is greater than a first predetermined rate before oxygen
is formed by the oxygen-forming unit; and
an oxygen concentration-maintaining unit that maintains the oxygen concentration of the gas after the oxygen-discharging unit
discharges oxygen from the gas.
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