Text from page 24 of catalogue Cylinder head gaskets
Page 24 of catalogue Cylinder head gaskets of Reinz-Dichtungs-GmbHWAVE-STOPPER ®
Design Concentric »waves« are embossed in the active functional layer of the spring steel sheet around the combustion chamber. Normally, the Wave-Stopper® consists of two to five individual waves. The Wave-Stoppers® characteristics are influenced by the number of waves, their separation, radius, and the sheet thickness. By means of partially terminated waves, the head gasket can be individually adapted to the engine's component stiffness. By varying the wave symmetry, it is possible to ensure symmetrical limitation of bead compression in the different layers at the height specified by the Wave-Stopper®. Depending on the gasket's design, wave height can be varied upwards or downwards. The Wave-Stopper® also permits single-layer (SLS) head gasket designs.
determine the Wave-Stoppers® properties. If the Wave-Stopper® has an elastomer coating, the latter is forced into the wave valleys when compressed, thus forming concentric rings. These provide additional micro sealing around the combustion chamber. Properties: Topographic adaptation In order to take advantage of the entire area around the combustion chamber, an additional height profile can be included in the Wave-Stopper®. For example, the stopper height is then reduced around the head Bolts, thus directing the local excess forces into the areas between the bolts. Consequently, the full elastic adaptation of the Wave-Stopper® is maintained in all areas with different heights. This topographic adaptation creates a highly uniform pressure image. Due to the great degree of design freedom, Wave-Stoppers® can always adapt perfectly to changing engine stiffness. Thanks to this behaviour, pressure peaks are equalized under all operating conditions, and the pressures on the surrounding components are harmonized.
Properties: Elastic/plastic characteristics Wave-Stoppers® exhibit pronounced plastic/elastic characteristics. Height and width of the individual waves
Top sheet Elastomer coating Bottom sheet with wave
Top sheet Elastomer coating Wave-Stopper ® Bottom sheet
Concept with freedom of design – Wave-Stoppers®.
Examples of constructional possibilities for Wave-Stopper® design.