Cylinder block

A modern straight-six engine block for a passenger car, integrating the crankcase and all cylinders. The cylinder head bolts to the deck surface at top. Many ribs and bosses can be seen on the side of the casting, as well as the passages for cooling fluid opening into the deck.

A V6 diesel engine block, with both of the cylinder banks as well as the crankcase formed en bloc. The large holes are the cylinders, while the small ones are the mounting holes (round) and coolant or oil ducts (oval).

De Dion-Bouton engine with discrete crankcase but with monobloc integration of the cylinders and heads, circa 1905. A discrete crankcase with upper and lower halves (each its own casting) can clearly be seen, with the bottom half constituting both part of the main bearing support and also an oil sump.[1]

A cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine and often some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase). The term engine block is often used synonymously with "cylinder block" (although technically distinctions can be made between en bloc cylinders as a discrete unit versus engine block designs with yet more integration that comprise the crankcase as well).

单词	Wet liner
释义	Wet liner 英语百科 Cylinder block A cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine and often some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase). The term engine block is often used synonymously with "cylinder block" (although technically distinctions can be made between en bloc cylinders as a discrete unit versus engine block designs with yet more integration that comprise the crankcase as well).
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Wet liner

Cylinder block