(19)
(11) EP 2 397 662 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.2013 Bulletin 2013/35

(43) Date of publication A2:
21.12.2011 Bulletin 2011/51

(21) Application number: 11169809.8

(22) Date of filing: 14.06.2011
(51) International Patent Classification (IPC): 
F01M 13/00(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: 22.12.2010 JP 2010285450
17.06.2010 JP 2010137849

(71) Applicant: MAHLE Filter Systems Japan Corporation
Tokyo 171-0014 (JP)

(72) Inventors:
  • Kobayashi, Akihiro
    Tokyo, 171-0014 (JP)
  • Mochizuki, Terumoto
    Tokyo, 171-0014 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser 
Leopoldstrasse 4
80802 München
80802 München (DE)

   


(54) Ventilation system and method for supercharged engine


(57) In ventilation system and method for a supercharge engine, in a middle load driving region of the engine in which the boost pressure of position of an intake air passage located at the downstream side with respect to a throttle valve is positive and is lower than a set pressure (P1), with importance placed on the ventilation of a crank chamber, a relatively large quantity of fresh air is introduced into the crank chamber and, on the other hand, in a high load driving region in which the boost pressure is equal to or higher than the set pressure (P1), with importance placed on the engine output, the large quantity of fresh air is supplied to the engine so that, while the deterioration of engine oil within the crank chamber suppressed, the output reduction of the engine in the high load driving region can be suppressed.







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Search report