Schaeffler (UK) Ltd · Great Britain

 
 
Components with hydraulic valve lash adjustment

Hydraulic tappet

 

Special characteristics:

  • The tappet is directly activated
  • Very high rigidity
  • Small moving mass due to the manufacturing process
  • High quality surfaces and heat treatment processes in cam contact in order to achieve low friction and high anti-wear protection
  • Highly cost-effective
 
 

Tappet, standard design

  • Very small wall thicknesses using formed steel for the housing and guide funnel allow high fatigue strength and rigidity with small moving mass
 
 

Bottom drain tappet

  • Oil reservoir volume can be used better – improved functional behaviour during engine startup and running
 
 

Anti-drain tappet

  • While the engine is switched off, oil cannot flow out of the outer reservoir – this gives improved functional behaviour during engine startup and running.
 
 

Labyrinth tappet

  • Combination of anti-drain and bottom drain mechanisms
  • Improved functional behaviour during engine startup and running
 
 

3CF tappet design

  • With cylindrical cam contact face – anti-rotation mechanism
  • Simple oil supply
  • 80% reduction in oil throughput by means of plunger guidance
  • Low contact pressures in cam contact
  • High acceleration of opening and closing possible
  • More effective valve lift characteristics possible with identical plunger diameter
  • Identical valve lift characteristics possible with smaller plunger diameter
  • Very low plunger mass
  • Very high rigidity
  • Reduced frictional power