(19)
(11) EP 1 306 532 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(48) Corrigendum issued on:
08.10.2003 Bulletin 2003/41

(43) Date of publication:
02.05.2003 Bulletin 2003/18

(21) Application number: 01934501.6

(22) Date of filing: 01.06.2001
(51) International Patent Classification (IPC)7: F01N 3/24
(86) International application number:
PCT/JP0104/661
(87) International publication number:
WO 0201/2688 (14.02.2002 Gazette 2002/07)
(84) Designated Contracting States:
DE FR GB

(30) Priority: 02.08.2000 JP 2000233862

(71) Applicant: Honda Giken Kogyo Kabushiki Kaisha
Minato-ku, Tokyo 107-0062 (JP)

(72) Inventors:
  • OKU, Masaru
    Wako-shi, Saitama 351-0113 (JP)
  • OGASA, Hiroshi
    Wako-shi, Saitama 351-0113 (JP)
  • KOHNO, Mari
    Wako-shi, Saitama 351-0113 (JP)

(74) Representative: Prechtel, Jörg, Dipl.-Phys. Dr. et al
Weickmann & Weickmann Patentanwälte Postfach 86 08 20
81635 München
81635 München (DE)

   


(54) EXHAUST EMISSION CONTROL DEVICE AND EXHAUST EMISSION CONTROL METHOD FOR NATURAL GAS ENGINE


(57) A natural gas engine capable of exhaust emission control over the entire temperature range and at low costs without requiring a complicated structure. An adsorbent (7) is disposed between a fuel tank (4) and a fuel supply port (5) on a suction air passage (2), and NMOG in the fuel gas supplied to the fuel tank (4) is adsorbed by the adsorbent (7) to purify the fuel gas in advance. When the temperature of a catalyst (11) disposed on an exhaust passage (3) reaches an activation temperature, the adsorbent (7) is heated by a heater (9) to a desorption temperature to desorb NMOG from the adsorbent (7) and purify the NMOG by the catalyst (11).