ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEEHUPLSKBAHRIS..MTNORSMESM..................JDIM360 Ver 2.15 (14 Jul 2008) - 1999001/02236809CORRECTED EUROPEAN PATENT APPLICATIONA9A320101124W184deBibliographieenBibliographyfrBibliographieEP10158190.820100329itenenBO2009019820090330IT201011242010472010100620104020101124201047F02M 59/46 20060101AFI20100423BHEP F04B 49/035 20060101ALI20100423BHEP F04B 49/24 20060101ALI20100423BHEP F04B 53/04 20060101ALI20100423BHEP deHochdruckkraftstoffpumpe mit verbesserten MaximaldruckventilenDirect-injection system fuel pump with an improved maximum-pressure valvefrPompe à carburant haute pression avec uen soupape améliorée de pression maximum2Magneti Marelli S.p.A.101100502E7599/10-EPViale Aldo Borletti 61/6320011 Corbetta (MI)ITMancini, Luca Via Bissolati, 5940054, BudrioITDe Vita, Daniele Via G. Verdi, 340024, Castel San Pietro TermeITMattioli, Massimo Via G. Dozza, 5240013, CastelmaggioreITJorio, Paoloet al100021073STUDIO TORTA Via Viotti 910121 TorinoITATBEBGCHCYCZDEDKEEESFIFRGBGRHRHUIEISITLILTLULVMCMKMTNLNOPLPTROSESISKSMTRALBAMERS20101013201041

A direct-injection system fuel pump (4) having : at least one pumping chamber (14); a piston (15) mounted to slide inside the pumping chamber (14) to cyclically alter the volume of the pumping chamber (14); an intake channel (17) connected to the pumping chamber (14) and regulated by an intake valve (18); a delivery channel (22) connected to the pumping chamber (14) and regulated by a one-way delivery valve (23) that only permits fuel flow from the pumping chamber (14); and a drain channel (32) regulated by a one-way, maximum-pressure valve (33), which opens when the fuel pressure in the drain channel (32) exceeds a threshold value, and which has a shutter (34) movable along the drain channel (32), a valve seat (35) engaged in fluidtight manner by the shutter (34), and a spring (36) calibrated to push the shutter (34) into a position engaging the valve seat (35) in fluidtight manner.