SIMPACK

The Hydraulic Lash Adjuster (HLA) provides a detailed representation of an HLA used in valvetrains or as hydraulic tensioner in e.g. chain and belt systems. A detailed description of the oil flow, including the mass effects of a plunger and valve ball, is provided based upon geometry and oil properties.

Gas Force is a Control Element that models the gas forces acting in a cylinder during the combustion process. Acting gas force due to combustion/compression is calculated for a particular firing order (i.e. different engine types). The calculation includes any deviation from the ideal crank angle for each crank pin due to torsion of the possible flexible crankshaft.

This module is based on a 1D multi mass description that includes spring dynamics and nonlinear behavior due to oscillating coil masses and coil-coil contact. The Dynamic Spring Multi Mass Model is a discretized model consisting of rigid masses.

The Simpack SIMBEAM Valve spring Model is based on a 3D flexible Beam description that includes spring dynamics and nonlinear behavior due to coil-coil contact. Widening of springs, twisting of springs, and lateral movement are covered. From a detailed SIMBEAM spring pre-processing model, a 1D segment multi-mass model can be automatically derived in order to achieve high detail in spring vertical behavior, coupled with optimized calculation time.

Simpack Chain enables the user to perform chain system simulations. The module covers roller and bushed chains, silent (or inverted tooth) chains, and smart chains. Full elasticity is available for link-link, link-sprocket, and link-guide contact. All guides can be modeled as flexible bodies. Friction is calculated for all contact definitions, and all calculated quantities (e.g. forces, frictional power) are easy to access.