Invention Grant
US07434557B2 Hydraulic valve clearance compensation element 失效
液压阀间隙补偿元件

  • Patent Title: Hydraulic valve clearance compensation element
  • Patent Title (中): 液压阀间隙补偿元件
  • Application No.: US11632811
    Application Date: 2005-06-18
  • Publication No.: US07434557B2
    Publication Date: 2008-10-14
  • Inventor: Peter SailerOliver Schnell
  • Applicant: Peter SailerOliver Schnell
  • Applicant Address: DE Herzogenaurach
  • Assignee: Schaeffler KG
  • Current Assignee: Schaeffler KG
  • Current Assignee Address: DE Herzogenaurach
  • Agent Charles A. Muserlian
  • Priority: DE102004035588 20040722
  • International Application: PCT/EP2005/006590 WO 20050618
  • International Announcement: WO2006/010413 WO 20060202
  • Main IPC: F01L1/14
  • IPC: F01L1/14
Hydraulic valve clearance compensation element
Abstract:
A hydraulic reverse spring valve clearance compensation element (RSHVA) for a valve train of an internal combustion engine comprising: a housing (2), which has a blind bore (3), in which a piston (4) is guided with a tight, sealing clearance; the piston (4) comprises a lower piston part (4a) with a lower piston head (5), which together with the blind bore (3) defines a high-pressure chamber (7), whilst a low-pressure chamber (8) is situated above the lower piston head (5); the pressure chambers (7, 8) being connected by a central axial bore (10) in the lower piston head (5), which is controlled by a control valve (11) arranged on the underside (23) of the lower piston head (5); the control valve (11) comprises a control valve ball (19), upon which a control valve spring (20) acts in the opening direction and the lift of which is limited by a lift-limiting stop (24) of a valve ball cap (21), whereby an RSHVA, the idle lift of which is as independent as possible of the viscosity and hence of the temperature of the lubricating oil is to be created and is achieved in that temperature-sensitive means influencing the closing time of the control valve (11) are provided, which lead to a closing time of the control valve (11) that is largely independent of the lubricating oil temperature of the internal combustion engine.
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