(19)
(11) EP 2 626 528 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
23.10.2013 Bulletin 2013/43

(43) Date of publication:
14.08.2013 Bulletin 2013/33

(21) Application number: 11857419.3

(22) Date of filing: 30.11.2011
(51) International Patent Classification (IPC): 
F01N 3/08(2006.01)
F01N 3/36(2006.01)
 F01N 3/20(2006.01)
F02D 41/04(2006.01)
(86) International application number:
PCT/JP2011/077663
(87) International publication number:
WO 2013/080330 (06.06.2013 Gazette 2013/23)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Toyota-shi, Aichi-ken, 471-8571 (JP)

(72) Inventors:
  • UMEMOTO, Kazuhiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • YOSHIDA, Kohei
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • INOUE, Mikio
    Toyota-shi, Aichi-ken, 471-8571 (JP)

(74) Representative: Kuhnen & Wacker 
Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE


(57) An exhaust purification system of an internal combustion engine is provided with an exhaust purification catalyst which includes an upstream side catalyst and a downstream side catalyst and which makes NOx and hydrocarbons react. The upstream side catalyst has an oxidation ability, while the downstream side catalyst carries precious metal catalyst particles on an exhaust flow surface and is formed with basic exhaust flow surface parts. The exhaust purification catalyst makes the concentration of hydrocarbons vibrate by within a predetermined range of amplitude and by within a predetermined range of period so as to remove the NOX. The upstream side catalyst has a high efficiency temperature at which hydrocarbons can be partially oxidized by a predetermined efficiency. The exhaust purification system controls the temperature of the upstream side catalyst so that the upstream side catalyst becomes less than the high efficiency temperature in the time period of feeding hydrocarbons and the upstream side catalyst becomes a high efficiency temperature or more after feeding the hydrocarbons.