(19)
(11) EP 2 022 966 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.08.2009 Bulletin 2009/35

(43) Date of publication A2:
11.02.2009 Bulletin 2009/07

(21) Application number: 08009371.9

(22) Date of filing: 21.05.2008
(51) International Patent Classification (IPC): 
F02D 35/02(2006.01)
 F02D 41/24(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: 06.08.2007 IT AO20070589

(71) Applicant: GM Global Technology Operations, Inc.
Detroit, MI 48265-3000 (US)

(72) Inventors:
  • Catanese, Alessandro
    10043 Orbassano (TO) (IT)
  • Parisi, Filippo
    10137 Torino (IT)
  • Pisoni, Eugenio
    10134 Torino (IT)
  • Monferrato, Claudio
    10030 Rondissone (TO) (IT)

(74) Representative: Kraenzmer, Martin 
Adam Opel GmbH Gewerblicher Rechtschutz Patentrecht IPC: A0-02
65423 Rüsselsheim
65423 Rüsselsheim (DE)

   


(54) Pressure monitoring system


(57) A pressure monitoring system for a combustion engine comprises a plurality of combustion chambers (2) and a pressure sensors (5) associated to at least some of the combustion chambers (2). A multiplexer (7) has inputs connected to at least a first one and a second one of said pressure sensors (5). A non-zero phase shift exists between the operating cycles of first and second ones of the combustion chambers (2) associated to said first and second pressure sensors (5). A controller (14) controls the multiplexer (7) to output data from the first pressure sensor (5) while the first combustion chamber (2) is in a predetermined portion of its operating cycle and pressure data from the second pressure sensor (5) while the second combustion chamber (2) is in said predetermined portion of its operating cycle.







Search report