(19)
(11) EP 3 115 592 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.01.2017 Bulletin 2017/04

(43) Date of publication A2:
11.01.2017 Bulletin 2017/02

(21) Application number: 16177766.9

(22) Date of filing: 04.07.2016
(51) International Patent Classification (IPC): 
F02M 63/00(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
Designated Validation States:
MA MD

(30) Priority: 08.07.2015 CN 201520490076 U

(71) Applicant: ROBERT BOSCH GMBH
70442 Stuttgart (DE)

(72) Inventor:
  • Chen, Yanlin
    Wuxi, Jiang Su, 214028 (CN)

   


(54) A CONTROL VALVE FOR FUEL INJECTOR AND A FUEL INJECTOR


(57) A fuel injector and a control valve used in it are disclosed. The control valve comprises: a valve seat (1) defining a valve seating surface (3) and a fuel passage (2) extending through the valve seating surface (3), the fuel passage (2) being in communication with an injection valve of the fuel injector and forming a pressure releasing path which is provided for controlling the operation of the injection valve; and a valve element (4) moveable in a longitudinal direction and configured to cooperate with the valve seat (1) to open and close the fuel passage (2); wherein the fuel passage (2) comprises a first passage (2a) and a second passage (2b), both extending in the longitudinal direction, and an a turn-back passage (2d,2e,2f) continuously joined between the first (2a) and second (2b) passages. Erosion of the valve element (4) can be suppressed.







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Search report