(19)
(11) EP 1 978 216 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.09.2009 Bulletin 2009/40

(43) Date of publication A2:
08.10.2008 Bulletin 2008/41

(21) Application number: 08005826.6

(22) Date of filing: 27.03.2008
(51) International Patent Classification (IPC): 
F01N 1/08(2006.01)
 F01N 1/16(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 04.04.2007 JP 2007098526

(71) Applicant: Nissan Motor Co., Ltd.
Kanagawa 221-0023 (JP)

(72) Inventors:
  • Maeda, Kazushige
    Atsugi-shi Kanagawa 243-0123 (JP)
  • Sasaki, Akira
    Atsugi-shi Kanagawa 243-0123 (JP)

(74) Representative: Görz, Ingo 
Hoefer & Partner Patentanwälte Pilgersheimer Strasse 20
81543 München
81543 München (DE)

   


(54) Method and apparatus for controlling engine exhaust sound for vehicles


(57) An exhaust sound controlling method including reducing a flow rate of exhaust gas that passes through an exhaust path, to a first flow rate in accordance with increase in engine speed in a first engine speed region, and increasing the flow rate of exhaust gas to a second flow rate in accordance with increase in engine speed in a second engine speed region higher in engine speed than the first engine speed region. An exhaust sound controlling apparatus including a baffle plate and a valve that is operated to open a communication passage that communicates upstream and downstream sides of the baffle plate in an engine starting region, close the communication passage in an idling region and a low engine speed region, and open the communication passage and increase an opening of the valve as the engine speed rises in a high engine speed region.







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