Now cars with small displacement engine cylinder block is basically aluminum alloy material.
Cylinder block is the engine of body, bearing of the crankshaft, piston, connecting rod and other components structure, provides the piston running environment, internal mixture combustion in cylinder and generate. Large thrust to the piston downward. Working conditions of the cylinder block is very bad. It needs in the process of combustion pressure and temperature of dramatic change and intense friction of piston movement.
Advantages of aluminum alloy cylinder block:
1. good heat transfer performance, conducive to improve the compression ratio of the engine;
2. reduce the quality of the engine, now the automobile company fuel consumption pressure is relatively large, lightweight is a way to reduce fuel consumption;
Disadvantages of aluminum alloy cylinder block:
1. High cost of cast aluminum cylinder block;
2. In order to improve the wear resistance of the inner surface of the cast aluminum cylinder, special measures must be taken to conduct coating treatment on the inner surface of the cylinder, which also increases the cost.
The advantages and disadvantages of cast iron block are completely opposite to that of cast aluminum block.
Cast iron cylinder material cost and processing cost are low, good strength and stiffness, vibration and noise; Adopt no cylinder liner structure, directly in the cylinder body surface processing, the process requirements are low.
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