Open Source Piston Engine Conceptual Design

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  • Exhaust gas recirculation - reduces peak in-cylinder temperatures, reducing NOX [1]
  • Electronic valves - eliminates need for camshaft and rockers, allowing higher simplicity, and 30% efficiency gain.
  • DIY campless - [2]
  • Camless engines are not yet available, outside of some large diesels. [3]
  • Free piston engine - drives a working fluid directly, without crankshaft
  • Stelzer engine - 2 opposing combustion chambers with middle pumping chamber. [4]. Pertinent popular references - [5] and [6]
  • Free piston engine linear generator (FPEG) - [7]
  • Hydrogen-powered linear generator is reportedly as efficient as fuel cells - [8]

References

  1. ↑ https://en.wikipedia.org/wiki/Exhaust_gas_recirculation
  2. ↑ http://rbowes1.11net.com/dbowes/index.htm
  3. ↑ https://hackaday.com/2016/02/16/where-are-all-the-camless-engines/
  4. ↑ https://en.wikipedia.org/wiki/Stelzer_engine
  5. ↑ https://timesmachine.nytimes.com/timesmachine/1983/06/27/257969.html?pageNumber=53
  6. ↑ https://books.google.co.uk/books?id=FeMDAAAAMBAJ&pg=PA62&lpg=PA62&dq=stelzer+engine&source=bl&ots=aGh4T-XMpP&sig=Ajz06elbtD8LeNBc7NGlPnsvD8o&hl=en&sa=X&ei=bRAUVcvXAcHlUraEhLAO&sqi=2&ved=0CF0Q6AEwDA#v=onepage&q=stelzer%20engine&f=false
  7. ↑ https://www.roadandtrack.com/car-culture/a6326/out-of-turn-toyota-engine/
  8. ↑ https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535bf.pdf
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