Laser Honing Rising customer expectations and future exhaust and emission laws place extensive requirements gaseoline and diesel engines. The laser honing developed by Gehring has become an international stan- dard. For both diesel and gaseoline engines, the laser structuring of the cylinder is currently applied in the range of the upper piston rever- sal point. The combination of laser structuring and honing of cylinder bore surfaces is known as laser Objective of laser honing In principle, the frictional forces in the tribological system consiting of piston ring and cylinder bore on to the future viability of internal combustion engines, laser honing provides an opportunity to improve exhaust emissions so that the future exhaust limits such as Euro 5 and Euro 6 are easier to achieve. Principles of laser honing The combined honing and laser structuring of cylinder bore surfaces is considered laser honing. During this process the engine block first undergoes the conventional rough and intermediate honing step in order to achieve the desired base profile for the laser structuring. Microscopic pockets, the engine- specific laser structure, are created into the cylinder bore surface by means of a laser beam. The subse- quent final steps, deburring and I. Itoqgfi JBtilug ?- liiiL^mudlaeHonUg Process sequence for the laser structuring of cylinder bores finish honing, remove the melt protrusions arising from the laser processing to create an extremely fine surface. Cylinder bore after laser honing Structure after laser honing Structure after finishing work

Your benefits The advantages of laser honing have been proven in dynamometer and fleet tests as well as in numerous series applications. Due to the smooth cylinder bore surface and the superimposed micropocket structure the tribological system of piston ring - cylinder bore offers numerous customer advantages: • reduction in oil consumption • improvement in emissions • reduction in friction • reduction in wear Laser structuring of connecting rod eyes Principles of laser structuring In addition to improving sliding properties, laser structuring can also be used for other areas of application....