By MAHLE International GmbH

Due to the ever expanding requisites to be met through fuel and diesel engines when it comes to CO2 aid, emission habit, weight, and repair lifestyles, a entire realizing of combustion engine elements is vital this present day. it really is not attainable for a certified in automobile engineering to regulate with out the corresponding knowledge, no matter if that's within the box of layout, improvement, checking out, or upkeep. This technical ebook offers in-depth solutions to questions about layout, creation, and machining of cylinder elements.

¿ Piston rings
¿ Piston pins and piston pin circlips
¿ Bearings
¿ Connecting rods
¿ Crankcase and cylinder liners

Target audience
¿ Engineers in engine improvement and maintenance
¿ teachers and scholars within the parts of mechanical engineering, engine expertise, and motor vehicle building
¿ somebody attracted to technology

The MAHLE team is without doubt one of the most sensible 30 automobile providers and the globally major producer of elements and platforms for the inner combustion engine and its peripherals.

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Extra info for Cylinder components: Properties, applications, materials

Example text

For a given projected bearing surface, the bearing with the higher width/diameter ratio experiences lower oil film 56 3 Bearings pressures, greater minimum oil film thicknesses, and thus more advantageous load conditions. 2 Oil grooves and holes The lubricating oil enters the bearing through grooves and holes. They also have a significant influence on the function of the bearings. They are undesirable in loaded areas, because they increase the maximum oil film pressure and reduce the minimum oil film thickness.

Piston pins made of nitrided steel are especially noteworthy for their outstanding wear resistance. The enrichment of the edge zones with carbon or nitrogen causes an increase in volume, which leads to compressive stresses in the piston pin edge layers. As previously indicated, these residual stresses at the surface have a positive effect on the fatigue resistance of the piston pin. Material or microstructure defects, such as decarburization of the surface, cementite network, missing case hardening of the inner bore, hardening and grinding cracks, or open slag lines are especially critical in these edge zones.

9 shows the spread of the test results for two bearing materials. 10) is used. Wear resistance is particularly dependent on the hardness of the material. Galvanized trimetal bearings can therefore not be compared to bi-metal bearings, because the overlays are very soft. 12). Hardness and the presence of soft phases in the material influence the ranking. 1 Bearing diameter and width Peak oil film pressure (POFP) and minimum oil film thickness (MOFT) are strongly associated with the bearing diameter and bearing width.

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