Cast aluminum engine advantages and disadvantages

[China Aluminum Network] advantages of cast aluminum engine:
From the point of view of use, the advantage of the cast aluminum cylinder body is its light weight, which saves fuel by reducing the weight. In an engine of equal displacement, using an aluminum cylinder engine can reduce the weight of about 20 kg. Every 10% reduction in the car's own weight, fuel consumption can be reduced by 6% to 8%. According to the newer data, the weight of foreign cars themselves has been reduced by 20% to 26% compared with the past.
In addition to the difference in weight, there are many differences between the cast iron cylinder and the cast aluminum cylinder in the production process. The cast iron production line has a large area, which has large environmental pollution and complicated processing technology. The production characteristics of cast aluminum cylinders are exactly the opposite. From the perspective of market competition, cast aluminum cylinders have certain advantages.
All-aluminum engines are superior to cast iron engines in terms of material and heat dissipation.
Disadvantages of cast aluminum engines:
Because of the lighter weight of aluminum, the structural strength per unit volume of aluminum is smaller than that of cast iron. Therefore, the volume of the aluminum cylinder is usually larger than that of cast iron, and it is difficult to achieve the compactness and small size of the cast iron cylinder.
Corrosion resistance and strength difference As we all know, aluminum is easy to chemically react with the water produced during combustion, so the corrosion resistance is far inferior to that of cast iron cylinders, especially for supercharged engines with higher temperature pressure requirements. In addition to the already stated volume-related conclusions, it is difficult to achieve the strength of a cast iron cylinder using an aluminum cylinder when the vehicle's engine volume requirement is small. Therefore, most high-pressure engines use cast iron cylinders. In these two respects, the aluminum engine is obviously inferior to the cast iron engine.
Higher coefficient of friction The current car engine, in order to reduce the reciprocating component inertia, usually increases the speed and response speed, and most of the pistons use aluminum alloy as a material. If the cylinder wall is made of aluminum. The friction coefficient between aluminum and aluminum is relatively large. For this reason, the performance of the engine will be greatly affected. On the contrary, the cast iron engine will not cause such problems. Therefore, in this respect, the cast iron cylinder body is also superior to the all-aluminum engine.

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