What are the special requirements for engine valves in new energy vehicles?

Material Selection: To reduce weight and enhance performance, engine valves are increasingly utilizing high-performance materials such as PEEK (polyether ether ketone) films.

1. Lightweight and High-Performance Materials

• Material Selection: To reduce weight and enhance performance, engine valves are increasingly utilizing high-performance materials such as PEEK (polyether ether ketone) films. PEEK films are known for their high-temperature resistance, chemical resistance, and excellent tribological properties, which can replace traditional metal valve plates, thereby reducing weight and improving fuel efficiency.

• Environmental Materials: Environmental standards for 2025 have set higher requirements for automotive components, prohibiting or restricting the use of materials containing harmful substances such as lead, mercury, and cadmium. Engine valves must also comply with these environmental requirements.

2. Efficient Combustion and Energy Conservation

• Variable Valve Timing and Lift Technology: To improve combustion efficiency and reduce emissions, engine valves need to be equipped with variable valve timing (VVT) and variable valve lift technologies. These technologies can dynamically adjust the valve opening time and lift according to the engine's operating conditions, thereby optimizing combustion efficiency.

• High Precision Control: New energy vehicles have higher precision requirements for engine valve control to ensure efficient combustion and low emissions under various operating conditions.

3. Durability and Reliability

• Durability Requirements: Engine valves in new energy vehicles need to have higher durability to withstand long-term high-load operation. This requires valve materials and designs to withstand high temperatures, high pressures, and high-frequency opening and closing.

• Quality Standards: Engine valves must meet strict international and national standards, such as ISO/TS16949 and GB/T 13827-2019, to ensure their quality and reliability.

4. Intelligence and Integration

• Intelligent Control: With the development of intelligent and autonomous driving technologies, engine valve control will become more intelligent. The valve system needs to be deeply integrated with the engine control unit (ECU) to achieve more precise control.

• Integrated Design: Engine valve design will become more integrated, reducing the number of components and improving system reliability and maintenance convenience.

5. Adaptation to New Energy Power Systems

• Hybrid and Plug-in Hybrid Vehicles: In hybrid and plug-in hybrid vehicles, engine valves need to adapt to frequent start-stop operations, which pose higher requirements for valve durability and response speed.

• Fuel Cell Vehicles: For fuel cell vehicles, engine valves need to have good sealing and corrosion resistance to accommodate the use of special fuels such as hydrogen.

In summary, new energy vehicles have higher requirements for engine valves, which not only need to meet the requirements of lightweight and high-performance materials but also need to have the capabilities of efficient combustion, energy conservation, high durability, intelligent control, and adaptation to new energy power systems. These requirements are driving continuous innovation and upgrading of engine valve technologies.