Open Source Piston Engine Conceptual Design: Difference between revisions

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=Basics=
*This page is focused on pre-dev research on the [[Open Source Piston Engine]]
*The Youtube Channel "Engineering Explained" has great information, and explanations on all sorts of engine related stuff, especially developing technologies
=Emissions Contol=
*[[Diesel Exhaust Pollutants]]
*Exhaust gas recirculation - reduces peak in-cylinder temperatures, reducing NOX <ref>https://en.wikipedia.org/wiki/Exhaust_gas_recirculation</ref>
*Exhaust gas recirculation - reduces peak in-cylinder temperatures, reducing NOX <ref>https://en.wikipedia.org/wiki/Exhaust_gas_recirculation</ref>
*[[DEF]]
*[[Catalytic Converter]]
=Piston/Combustion Chamber Layouts=
*Electronic valves - eliminates need for camshaft and rockers, allowing higher simplicity, and 30% efficiency gain.
*DIY campless - <ref>http://rbowes1.11net.com/dbowes/index.htm</ref>
*Camless engines are not yet available, outside of some large diesels. <ref>https://hackaday.com/2016/02/16/where-are-all-the-camless-engines/</ref> -from 2016, is this still relevant, looking into this right now
**Seems to be one supercar coming out with it, and a company developing it for that car, may be in other designs?
***[https://www.roadandtrack.com/new-cars/future-cars/a26098563/koenigsegg-hybrid-supercar-camless-freevalve-engine/ The article on the obscenely expensive car]
***[[Freevalve]]
***Seems to be a pnuematic system?
****From their website:
"Previous fully variable valve actuation engines use either electro-magnetic or electro-hydraulic to open the poppet valves.
Instead of using these actuator types, Freevalve uses electro-hydraulic-pneumatic actuators combined with advanced sensor techniques.
As a result, Freevalve has overcome all of the typical challenges faced by other cam-less techniques."
==Free Piston==
*Free piston engine - drives a working fluid directly, without crankshaft XMpP&sig=Ajz06elbtD8LeNBc7NGlPnsvD8o&hl=en&sa=X&ei=bRAUVcvXAcHlUraEhLAO&sqi=2&ved=0CF0Q6AEwDA#v=onepage&q=stelzer%20engine&f=false</ref>
*Free piston engine linear generator (FPEG) - <ref>https://www.roadandtrack.com/car-culture/a6326/out-of-turn-toyota-engine/</ref>
*Hydrogen-powered linear generator is reportedly as efficient as fuel cells - <ref>https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535bf.pdf</ref>. Discusses linear generator configuration fired on both sides. Also discusses compression ignition of non-diesel fuel - via homogeneous (premixed) charge - (HCCI) . Peter Van Blarigan, Sandia Labs {{sme}}
==Stelzer Engine==
*Stelzer engine - 2 opposing combustion chambers with middle pumping chamber. <ref>https://en.wikipedia.org/wiki/Stelzer_engine</ref>. Pertinent popular references -
<ref>https://timesmachine.nytimes.com/timesmachine/1983/06/27/257969.html?pageNumber=53</ref> and <ref>https://books.google.co.uk/books?id=FeMDAAAAMBAJ&pg=PA62&lpg=PA62&dq=stelzer+engine&source=bl&ots=aGh4T-
=Ignition Methods=
*Conventional Gasoline (spark ignition_
*Diesel (Compression, flame triggered via fuel addition)
*Homogeneous charge compression ignition - </ref>https://www.intechopen.com/books/advances-in-internal-combustion-engines-and-fuel-technologies/homogenous-charge-compression-ignition-hcci-engines</ref>
**Uses pre-mixed fuel-air (via external/port injection, with ignition solely due to pressure + temperature increase)
**Main challenges seem to be
***Making the precise "mix"
***Keeping the engine temperature in the proper zone, as too hot causes premature ignition (knocking)


=References=
=References=

Latest revision as of 17:13, 25 May 2020

Basics

  • This page is focused on pre-dev research on the Open Source Piston Engine
  • The Youtube Channel "Engineering Explained" has great information, and explanations on all sorts of engine related stuff, especially developing technologies

Emissions Contol

Piston/Combustion Chamber Layouts

  • 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] -from 2016, is this still relevant, looking into this right now

"Previous fully variable valve actuation engines use either electro-magnetic or electro-hydraulic to open the poppet valves.

Instead of using these actuator types, Freevalve uses electro-hydraulic-pneumatic actuators combined with advanced sensor techniques.

As a result, Freevalve has overcome all of the typical challenges faced by other cam-less techniques."

Free Piston

  • Free piston engine - drives a working fluid directly, without crankshaft XMpP&sig=Ajz06elbtD8LeNBc7NGlPnsvD8o&hl=en&sa=X&ei=bRAUVcvXAcHlUraEhLAO&sqi=2&ved=0CF0Q6AEwDA#v=onepage&q=stelzer%20engine&f=false</ref>
  • Free piston engine linear generator (FPEG) - [4]
  • Hydrogen-powered linear generator is reportedly as efficient as fuel cells - [5]. Discusses linear generator configuration fired on both sides. Also discusses compression ignition of non-diesel fuel - via homogeneous (premixed) charge - (HCCI) . Peter Van Blarigan, Sandia Labs Sme.png

Stelzer Engine

  • Stelzer engine - 2 opposing combustion chambers with middle pumping chamber. [6]. Pertinent popular references -

[7] and [8]https://www.intechopen.com/books/advances-in-internal-combustion-engines-and-fuel-technologies/homogenous-charge-compression-ignition-hcci-engines</ref>

    • Uses pre-mixed fuel-air (via external/port injection, with ignition solely due to pressure + temperature increase)
    • Main challenges seem to be
      • Making the precise "mix"
      • Keeping the engine temperature in the proper zone, as too hot causes premature ignition (knocking)


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://www.roadandtrack.com/car-culture/a6326/out-of-turn-toyota-engine/
  5. ↑ https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535bf.pdf
  6. ↑ https://en.wikipedia.org/wiki/Stelzer_engine
  7. ↑ https://timesmachine.nytimes.com/timesmachine/1983/06/27/257969.html?pageNumber=53
  8. ↑ https://books.google.co.uk/books?id=FeMDAAAAMBAJ&pg=PA62&lpg=PA62&dq=stelzer+engine&source=bl&ots=aGh4T-

    Ignition Methods

    • Conventional Gasoline (spark ignition_
    • Diesel (Compression, flame triggered via fuel addition)
    • Homogeneous charge compression ignition -
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