(19)
(11) EP 2 682 581 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

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

(48) Corrigendum issued on:
05.03.2014 Bulletin 2014/10

(43) Date of publication:
08.01.2014 Bulletin 2014/02

(21) Application number: 13173371.9

(22) Date of filing: 24.06.2013
(51) International Patent Classification (IPC): 
F01N 3/20(2006.01)
(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
Designated Extension States:
BA ME

(30) Priority: 03.07.2012 JP 2012149584

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

(72) Inventor:
  • OTA, Hirohiko
    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 emission control apparatus for internal combustion engine, and control method for the exhaust emission control apparatus


(57) An exhaust emission control apparatus for an internal combustion engine includes a urea water addition valve (104) provided in an exhaust passageway (1) and a supply passageway (102) that supplies urea water to the addition valve (104). This apparatus executes a recovery process of recovering an additive present in the supply passageway (102) by driving an electric urea water pump (103) with a vehicle-mounted battery (2) after the engine stops. In the exhaust emission control apparatus, the execution time of the recovery process is variably set on the basis of the battery voltage of the vehicle-mounted battery (2).