(19)
(11) EP 2 474 713 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
26.09.2012 Bulletin 2012/39

(43) Date of publication:
11.07.2012 Bulletin 2012/28

(21) Application number: 10849994.8

(22) Date of filing: 08.11.2010
(51) International Patent Classification (IPC): 
F01L 1/34(2006.01)
(86) International application number:
PCT/JP2010/069858
(87) International publication number:
WO 2012/063312 (18.05.2012 Gazette 2012/20)
(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

(71) Applicant: Toyota Jidosha Kabushiki Kaisha
Aichi 471-8571 (JP)

(72) Inventors:
  • FUJIMURA, Haruhito
    Aichi 471-8571 (JP)
  • YOKOYAMA, Yuu
    Aichi 471-8571 (JP)
  • NUMAKURA, Masaki
    Aichi 471-8571 (JP)

(74) Representative: Kuhnen & Wacker 
Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) CONTROL DEVICE FOR OIL PRESSURE VALVE VARIABLE TIMING MECHANISM


(57) In a hydraulic variable valve timing mechanism comprising a lock pin that locks a vane rotor and a housing against relative rotation in the most retarding phase, a specified angle α is set so that release of the lock pin is started at a time when positive cam torque acts on the vane rotor. When the crank angle reaches the specified angle α1 supply of hydraulic pressure to the advancing oil chamber is started to release the lock pin from the engagement with the lock hole, thereby enabling a reliable release of the lock pin prior to start of change of valve timing.