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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshihisa Tsukamoto, Hiromasa Nishioka, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo
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In an exhaust purification system of an internal combustion engine of the present invention, a silver-alumina-based catalyst device and NOX reducing catalyst device are arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a first set temperature T1 on the high temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device. When the temperature of the silver-alumina-based catalyst device becomes a second set temperature on the low temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device.
An exhaust purification system of an internal combustion engine in which the engine exhaust system, a silver-alumina-based catalyst device and NOX reducing catalyst device are arranged, wherein when a temperature of said silver-alumina-based catalyst device becomes a first set temperature on the high temperature side, NOX released from said silver-alumina-based catalyst device is reduced by reducing material to be purified in said NOX reducing catalyst device and when the temperature of said silver-alumina-based catalyst device becomes a second set temperature on the low temperature side, NOX released from said silver-alumina-based catalyst device is reduced by reducing material to be purified in said NOX reducing catalyst device.
Dependencies are inferred from the claim text.