COMMERCIALIZING CGI: SinterCast's casting technology moves beyond development phase into series engine head and block production

摘要

Engine design is largely governed by performance objectives and constrained by packaging, durability, fuel economy and emissions requirements. For diesel engines in particular, these conflicting demands are satisfied by increasing the peak firing pressure in the cylinder (P{sub}(max)). The resulting increased combustion load is transferred via the connecting rod to the crankshaft and could ultimately apply a fatigue load to the main bearing region of the engine block. As P{sub}(max) modern passenger car applications has increased from 1958 psi in 1997 to approximately 2500 psi today to satisfy emissions legislation, conventional materials require larger cross-sections to withstand the fatigue loading. This development contradicts demands for weight and packaging, particularly for diesel engines used in on- and off-highway vehicles, where P{sub}(max) targets are well over 2900 psi and cylinder bore diameters are larger.