(19)
(11) EP 1 808 594 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:
17.10.2007 Bulletin 2007/42

(43) Date of publication:
18.07.2007 Bulletin 2007/29

(21) Application number: 07100269.5

(22) Date of filing: 09.01.2007
(51) International Patent Classification (IPC): 
F02M 35/12(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 13.01.2006 JP 2006005676
24.01.2006 JP 2006014883
02.03.2006 JP 2006056579
30.03.2006 JP 2006095749

(71) Applicants:
  • DENSO CORPORATION
    Kariya-city, Aichi-pref., 448-8661 (JP)
  • NIPPON SOKEN, INC.
    Nishio-city, Aichi-pref. 445-0012 (JP)

(72) Inventors:
  • Nakayama, Toshiaki DENSO CORPORATION
    Kariya-city Aichi 448-8661 (JP)
  • Fukumori, Sadahito DENSO CORPORATION
    Kariya-city Aichi 448-8661 (JP)
  • Hayashi, Kazuhiro DENSO CORPORATION
    Kariya-city Aichi 448-8661 (JP)
  • Katoh, Naoya NIPPON SOKEN, INC.
    Nishio-city Aichi 445-0012 (JP)
  • Otsubo, Makoto NIPPON SOKEN, INC.
    Nishio-city Aichi 445-0012 (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Intake muffler


(57) A resonator (3) is connected with an intake air pipe (8) and forms a resonant chamber (30) therein. The resonator (3) includes a diaphragm (4), which is generally planar and is disposed between an air passage (20) of the intake air pipe (8) and the resonant chamber (30). The diaphragm (4) forms multiple oscillation sections (40-42,45-51), which have different natural frequencies, respectively.