Aside the automatic derivation, integration and balancing of the lift, velocity, acceleration and jerk curves, SimOCam calculates the following results automatically, if desired:

  • Cam outline, i.e. the geometrical cross section of the cam, depending on the valve lift and valve train data.
  • Spring Force, i.e. the valve spring force, in N, in function of the cam position.  In the case of a dynamic spring definition, i.e. where the spring mass is involved in the dynamic behaviour of the spring, this plot will not only show the actual valve spring force (in full line), but also the ideal spring force (in dotted line), obtained if the mass of the spring equals zero.
  • Hertzian pressure in Pa  (N/mē) at the cam/tappet & follower contact.
  • Orthogonal and tangential cam contact force in N, acting on the cam/tappet & follower contact area.
  • Cam contact position, i.e. the displacement of the contact point versus that line, that runs through the cam base circle centre and that is parallel to the valve shaft.
  • Equivalent contact curve radius at the cam/follower & tappet contact point.
    This value is obtained using the following expression of the

Rcam is the local curve radius of the cam at the contact point, and
Rrocker/tappet is the local curve radius on the follower or tappet at the contact point.

  • Local cam curve radius of the cam at the contact point.