temperature. A lack of lubrication between the loaded surfaces can also cause plastic deformation of the · cylinder liner surface.

temperature. A lack of lubrication between the loaded surfaces can also cause plastic deformation of the cylinder liner surface. Self-Ignition - The spontaneous or auto-combustion without an external source of heat or ignition. A diesel engine is an example where diesel fuel is ignited without a flame or spark due to ignition under high compression. Shear Load - A shear load is a force that produces a sliding failure between two surfaces moving on a plane parallel to the force. Shear Strength - A material’s ability to resist forces that case the internal structure to fail in shear. Silitec - An Al-Si cylinder bore liner technology using spray-compacted, hypereutectic aluminum-silicon alloy that is cast into aluminum cylinder blocks using a high pressure die casting process. Silitec was used starting in 1996 in the production of Mercedes V6 and V8 engines. Silitec bores require exposure of the silicon particles just as with Alusil or Lokasil bores to prepare the surface the pistons and rings will run on. Sleeve - A sleeve or liner is a cylinder insert that can be installed into an engine block, that once machined and prepared for operation, will support the piston and ring system. Soot - A substance composed of amorphous carbon formed by incomplete combustion. Sulfated Ash - ASTM D 874 tests for sulfated ash as a quantitative measure of ash forming metallic compounds in lubricating oil. Sulfur - Sulfur provides lubricity to fuels and lubricating oils, however, today ultra-low sulfur fuels require lubrication enhancers to be added, especially to offset the lack of lubricity of ethanol enriched fuels over ethanol free fuels. SUMEbore - Cylinder bore coating technology using powdered metal matrix composites allowing for liner- less engines blocks by Oerlikon Metco. It is designed to provide low friction, reduced wear, and increased corrosion resistance where low quality fuels or high exhaust gas recirculation rates are used. TDC - Top Dead Center. When the piston is located at the top-most point of the cylinder bore closest to the cylinder head. Thermal Conductivity - The measure of a material’s ability to conduct heat. Thermal Film - When discussing the formation of ZDDP films as an example, a thermal film forms when there is sufficient temperature to allow for the spontaneous formation of an anti-wear film on a surface in the absence of mechanical activation. Thermal Overload - Condition where the maximum temperature of a component is exceeded resulting in a reduction of operating life of the component or a catastrophic failure. Tining - Originally, tining consisted of applying a thin layer of tin as a wear or scuff barrier between aluminum pistons and aluminum cylinders. The term tinning is loosely used to describe any type of wear barrier applied to the piston. Tribofilm - A film formed on mostly solid surfaces as a result of a chemical reaction of the lubricant components or surface. Under-Eutectic Aluminum - Aluminum with less than 12% silicon content. Viscosity - Measure of a fluid’s resistance to deformation at a given rate, informally referred to as thickness. LN Engineering Technical Library. Copyright ©2019 LN Engineering LLC