Invention Application
US20090013944A1 DEVICE FOR CONTROLLING THE MOVEMENT OF A VALVE, IN PARTICULAR OF AN INTAKE VALVE, OF AN INTERNAL COMBUSTION ENGINE 失效
用于控制内燃机的阀门运动特别是进气阀的装置

  • Patent Title: DEVICE FOR CONTROLLING THE MOVEMENT OF A VALVE, IN PARTICULAR OF AN INTAKE VALVE, OF AN INTERNAL COMBUSTION ENGINE
  • Patent Title (中): 用于控制内燃机的阀门运动特别是进气阀的装置
  • Application No.: US12279810
    Application Date: 2007-02-22
  • Publication No.: US20090013944A1
    Publication Date: 2009-01-15
  • Inventor: Stefano Re FiorentinMario Palazzetti
  • Applicant: Stefano Re FiorentinMario Palazzetti
  • Applicant Address: IT Torino
  • Assignee: Fiat Auto S.p.A.
  • Current Assignee: Fiat Auto S.p.A.
  • Current Assignee Address: IT Torino
  • Priority: ITTO2006A000131 20060224
  • International Application: PCT/IB2007/050566 WO 20070222
  • Main IPC: F01L9/04
  • IPC: F01L9/04
DEVICE FOR CONTROLLING THE MOVEMENT OF A VALVE, IN PARTICULAR OF AN INTAKE VALVE, OF AN INTERNAL COMBUSTION ENGINE
Abstract:
The device is adapted to control the movement of a valve (1) of an internal combustion engine comprising a stem (1a) which may move in translation through an opening (2a) of a hollow guide body (2) and which ends in a mushroom head (1b) cooperating in operation with a valve seat (12) provided in a wall (13) of the engine head. The valve (1) may move in translation with respect to the hollow guide body (2) between a retracted position and a forward position in which the mushroom head (1b) respectively closes and opens the associated valve seat (12).The control device comprises an electromagnet (3) adapted, when energised, to retain the valve (1) in the retracted closed position, a first spring (7) associated with the valve (1) and tending to urge it towards the open position, and a second spring (8) also associated with the valve (1) and tending to oppose its transition into the open position. The arrangement is such that when the electromagnet (3) is de-energised, the valve (1) moves in acceleration towards the open position under the action of the first spring (7) until the action of the latter stops, and then the valve (1) moves in deceleration into the open position under the action of the second spring (8).
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