Valve Train Simulation

Most of the applied valve train analysis tools are based on in-house developed software packages, specifically tailored for the most common valve train designs. In parallel, when complex 3D arrangements are used, HERON has the license for the well-known CDS™ program.

This technology must be seen as a useful complement to the 1D gas exchange optimisation when new valve timings and subsequently new valve lift curves are requested.

The HERON Approach:

·        Definition of the valve timings and maximum lift height by 1D cycle simulation work

·        Creation of high sophisticated bi-spline based valve lift curve

·        Control and check constrains from the valve train design in terms of stress

·        Definition of the spring characteristic

·        Check for valve-piston clearances

·        Calculation of the forces, stress, and grinding coordinates

Common valve train designs:

·        Flat tapped

·        Rocker arm

·        Finger follower

·        Push rod