Advantages of aluminum:

Currently, the cylinder blocks of gasoline engines are divided into cast iron and cast aluminum. In diesel engines, cast iron cylinder blocks account for the vast majority. In recent years, with the rapid development of the automobile industry, cars have quickly entered the lives of ordinary people, and at the same time, the fuel-saving performance of vehicles has gradually received attention. Reduce the weight of the engine and save fuel. The use of cast aluminum cylinder can reduce the weight of the engine. From the point of view of use, the advantage of cast aluminum cylinder block is light weight, which can save fuel by reducing weight. In an engine of the same displacement, the use of an aluminum-cylinder engine can reduce the weight of about 20 kilograms. For every 10% reduction in the vehicle's own weight, fuel consumption can be reduced by 6% to 8%. According to the latest data, the weight of foreign cars has been reduced by 20% to 26% compared with the past. For example, Focus uses an all-aluminum alloy material, which reduces the weight of the vehicle body, and at the same time enhances the heat dissipation effect of the engine, improves the efficiency of the engine, and has a longer life. From the perspective of fuel saving, the advantages of cast aluminum engines in fuel saving have attracted people's attention. In addition to the difference in weight, there are also many differences between cast iron cylinder blocks and cast aluminum cylinder blocks in the production process. The cast iron production line occupies a large area, has a large environmental pollution, and has a complicated processing technology; while the production characteristics of cast aluminum cylinder blocks are just the opposite. From the perspective of market competition, cast aluminum cylinder blocks have certain advantages.

Advantages of iron:

The physical properties of iron and aluminum are different. The heat load capacity of the cast iron cylinder block is stronger, and the potential of cast iron is greater in terms of engine power per liter. For example, the output power of a 1.3-liter cast iron engine can exceed 70kW, while the output power of a cast aluminum engine can only reach 60kW. It is understood that the 1.5-liter displacement cast iron engine can meet the power requirements of the 2.0-liter displacement engine through turbocharging and other technologies, while the cast aluminum cylinder engine is difficult to meet this requirement. Therefore, many people can also explode amazing torque output when driving the Fox at low speed, which is not only conducive to the start and acceleration of the vehicle, but also enables early shifting of gears to achieve fuel-saving effects.　　Aluminum cylinder block still uses cast iron material for a part of the engine, especially the cylinder, which uses cast iron material. The thermal expansion rate of cast aluminum and cast iron is not uniform after the fuel is burned, which is the problem of deformation consistency, which is a difficult problem in the casting process of cast aluminum cylinder blocks. When the engine is working, the cast aluminum cylinder engine equipped with cast iron cylinders must meet the sealing requirements. How to solve this problem is a problem that cast aluminum cylinder block companies pay special attention to.