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Hollow Valve for an Engine

Energy, Cleantech & Environmental
Engineering & Physical Sciences
College
College of Engineering (COE)
Researchers
Zhao, Ji-Cheng
Licensing Manager
Zinn, Ryan
614-292-5212
zinn.7@osu.edu

TS-040523 — A coolant-free valve with a hollow vacuum cavity which reduces heat conduction and improves the efficiency of engines

Valves are essential components of engines that regulate intake of fuel and air and removal of combustion products. Solid valves conduct a significant amount of heat, which reduces the efficiency of the combustion process. Previous hollow valve designs fill the inner chamber with low-melting metal…

The Need

Valves are essential components of engines that regulate intake of fuel and air and removal of combustion products. Solid valves conduct a significant amount of heat, which reduces the efficiency of the combustion process. Previous hollow valve designs fill the inner chamber with low-melting metal coolants that prevent damage to the valve head and prolong the life of the valve. However, these designs also decrease the efficiency of the engine. There is a need for a high efficiency valve unsusceptible to heat damage.

The Technology

Dr. Ji-Cheng Zhao from the Department of Materials Science and Engineering, has invented a coolant-free valve with a hollow vacuum cavity. The valve reduces heat conduction so more combustion heat is used to perform useful work, thus improving the efficiency of the engine. The coolant-free valve is coated with a thermal barrier on the external surface of the valve that is in contact with the combustion chamber of the engine to further improve efficiency. In addition, the design requires less manufacturing steps compared to current hollow valves, which results in more manufacturing flexibility and lower production costs.

Commercial Applications

  • Combustion Engines
    • Automotive
    • Electricity generation

Benefits/Advantages

  • Improved efficiency
  • Improved heat conduction
  • Fewer manufacturing steps