What Materials Are Used in Car Engines?
1 Answers
Engine materials are generally divided into two types: cast iron engines and aluminum engines. Differences between cast iron engines and aluminum alloy engines: Cast iron engines: Cast iron engines exhibit minimal thermal deformation. For engines operating under prolonged high-temperature and high-pressure conditions, cast iron engines offer excellent heat resistance and are less prone to deformation. Additionally, cast iron engines are easier and cheaper to repair when worn out, and they are more convenient to manufacture compared to aluminum alloy engines. However, they are heavier and have inferior heat dissipation compared to aluminum engines. Aluminum alloy engines: Compared to cast iron engines, aluminum alloy engines are lighter and dissipate heat faster, aligning with the current focus on environmental protection and fuel efficiency. The lightweight nature of aluminum alloy engines effectively reduces the engine's own weight, contributing to relatively better fuel economy. Faster heat dissipation plays a crucial role in protecting the engine, which is why most passenger car engines now use aluminum alloy engines. However, compared to cast iron engines, aluminum engines are more prone to deformation under heat, have higher maintenance costs, and more complex repair procedures.
