Crankcase and cylinder liners

Abstract

The crankcase is the central component of the internal combustion engine, containing and connecting the functional groups of the crank drive, and forms a system boundary that seals off the combustion engine externally. It prevents exit of the working medium, coolant, and lubricant, and the entry of moisture and dirt. The crankcase must utilize the given space at the lowest possible part mass, while maintaining sufficient structural stiffness and the shape accuracy of bearing bores and cylinder fit (for replaceable cylinder liners).