Page 7 of catalogue Cylinder head covers of Reinz-Dichtungs-GmbH

During the cylinder head cover’s design phase, we simulate the automated assembly sequence in the production line and also consider the packaging aspects. Even recycling issues and clean separation of the materials used is factored in. It’s all part of going the extra mile for the customer at VICTOR REINZ.

Interfaces: »Built-in« understanding

lations. In addition, our wealth of practical experience also streamlines FEA simulations at VICTOR REINZ. We’re able to continuously refine our computing models and simulations to make our programs smarter and more effective. In fact, during FEA calculations in the design phase, all relevant functional parts and critical areas of the entire composite structure and environment of a cylinder head cover module are examined in detail to ensure optimum cylinder head cover development. The virtual test bench 1: 2D analyses and load-balance determination for absolute tightness In the initial testing stage, the profile geometry and gasket groove are optimized by calculating the load curve in the 2D cross-section. Different combinations of geometries and materials are tested in numerous cycles to determine the optimum working range for the cylinder head cover gasket. The aim is to obtain uniform stresses for maximum seal tightness and durability, with simultaneous minimum material creep and stress. Fine tuning between narrow and wide profiles, as well as hard or soft sealing characteristics, is critical, especially with roughnesses or blowholes in the cylinder head.

With isolated cylinder head cover modules, a subsequent axial-symmetric analysis determines the load curves of the isolating elements. Stress calculations enable the characteristics of the elements to be modified precisely to obtain an optimum working range. Special attention is given to the compartmentation of the isolating elements (so called grommets) to prevent damage from excessive compression. The results of the 2D analyses for the cylinder head cover gasket and isolating element permit the load-balance diagram to be determined. This shows the resulting force of the system across the gap between cylinder head and cylinder head cover, assuming an infinitely stiff cylinder head cover module. During assembly, spacer sleeves ensure a creep-free and captive connection and prevent cracks or even breaks in the plastic. Based on a design sealing gap of 1 mm (0.0394 in), the precise functional dimensions and the number of Bolts for the isolating system can be determined.

Cylinder head cover modules from VICTOR REINZ not only fit the Engines for which they are designed, they also fit the 3D computer-design worlds of our customers. We speak the same language as your designers and supply geometrical data of the required cylinder head cover in the specified data format, using the fastest available online data transmission methods.

Finite elements analysis (FEA): Working smarter from the start Much of the time and cost for development required in the past can now be saved with computer component simu-

Force [kN]

10

8

Gasket Isolating element

6

4

2 0 0 0,5 1,0 1,5 2,0 2,5 Stand-Off [mm]

Optimal alignment of cylinder head cover gasket and gasket groove is achieved via 2D-analysis.

Fine tuning of the force deformation curves of cylinder head cover gasket and isolating element (load-balance determination).

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