Open Source Piston Engine Conceptual Design
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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 [1]
- DEF
- Catalytic Converter
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
- Seems to be one supercar coming out with it, and a company developing it for that car, may be in other designs?
- The article on the obscenely expensive car
- Freevalve
- Seems to be a pnuematic system?
- From their website:
- Seems to be one supercar coming out with it, and a company developing it for that car, may be in other designs?
"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
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
- ↑ https://en.wikipedia.org/wiki/Exhaust_gas_recirculation
- ↑ http://rbowes1.11net.com/dbowes/index.htm
- ↑ https://hackaday.com/2016/02/16/where-are-all-the-camless-engines/
- ↑ https://www.roadandtrack.com/car-culture/a6326/out-of-turn-toyota-engine/
- ↑ https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535bf.pdf
- ↑ https://en.wikipedia.org/wiki/Stelzer_engine
- ↑ https://timesmachine.nytimes.com/timesmachine/1983/06/27/257969.html?pageNumber=53
- ↑ 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 -