Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Reexamination Certificate
2005-06-28
2005-06-28
Doroshenk, Alexa (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
C422S108000, C422S111000, C422S168000, C422S177000, C422S180000, C060S276000, C060S285000, C060S301000, C060S302000
Reexamination Certificate
active
06911184
ABSTRACT:
An NOxstorage-and-reduction type catalyst is used which exhibits a saturated NOxstorage amount of 5 g or more as NO2with respect to 1 liter of a catalyst volume at 500° C., and rich spiking is controlled so that an actual NOxstorage amount of the NOxstorage-and-reduction type catalyst becomes 50% or less of the saturated NOxstorage amount.Since the saturated NOxstorage amount is large, the NOxstorage amount is large even when it is 50% or less, it is possible to prolong intervals of the rich spiking. Then, since NOxstorage component stores NOxpreferentially into the sites which are likely to store and release NOx, a reduction efficiency is high. Therefore, while prolonging the intervals of the rich spiking and sustaining an effect of mileage improvement, it is possible to improve the reduction efficiency of NOx.
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Kubo Shuichi
Matsunaga Shinichi
Saiki Motohisa
Doroshenk Alexa
Kabushiki Kaisha Toyota Chuo Kenkyusho
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