6 cylinder radial variable compression engine (new design)
Posted: Sun Oct 27, 2019 1:38 am
Hi folks I am designing a new engine, from scratch.
http://lkcl.net/engine - it is effectively a standard 2 stroke however it is six cylinder (double opposed) radial, and it is a variable compression ratio using chain driven TR8 lead screws exactly like on a 3D printer.
Clearly, it could be done mechanically, however the plan is to later do an augmentation using the Dyer 1921 "water injection" patent, which will involve adding a fuel injector as well as a single exhaust valve, and some method of stopping fuel on every alternate stroke. This may therefore require 12 fuel injectors: 6 for fuel, 6 for water.
Leaving that aside for now, initially I need to be able to run up to 6 spark plugs (simple 50cc Briggs and Stratton 0.5in diameter), read off a timing wheel, and, like a 3D printer, drive a stepper motor (NEMA8 5v 0.3A steppers) and also read off a linear potentiometer (in case of stepper skipping).
Does FreeEFI have onboard steppers or can anyone recommend a suitable board to plug into the Adapt9S12X? 6 will (eventually) be needed.
Yes, I do embedded software so programming is not a problem.
One problem: I have absolutely no clue as to what the best (simplest, off the shelf) sensor wheels are, where to get them, or what the best off the shelf electronic spark coils are, or how to drive them. Am currently in Canada.u
The nice thing is however that all of this is entirely being done from scratch, so literally anything can be chosen.
Suggestions welcomed as to what parts and driver boards would work, and where of course the FreeEFI and driver boards can be bought.
Tia,
L.
http://lkcl.net/engine - it is effectively a standard 2 stroke however it is six cylinder (double opposed) radial, and it is a variable compression ratio using chain driven TR8 lead screws exactly like on a 3D printer.
Clearly, it could be done mechanically, however the plan is to later do an augmentation using the Dyer 1921 "water injection" patent, which will involve adding a fuel injector as well as a single exhaust valve, and some method of stopping fuel on every alternate stroke. This may therefore require 12 fuel injectors: 6 for fuel, 6 for water.
Leaving that aside for now, initially I need to be able to run up to 6 spark plugs (simple 50cc Briggs and Stratton 0.5in diameter), read off a timing wheel, and, like a 3D printer, drive a stepper motor (NEMA8 5v 0.3A steppers) and also read off a linear potentiometer (in case of stepper skipping).
Does FreeEFI have onboard steppers or can anyone recommend a suitable board to plug into the Adapt9S12X? 6 will (eventually) be needed.
Yes, I do embedded software so programming is not a problem.
One problem: I have absolutely no clue as to what the best (simplest, off the shelf) sensor wheels are, where to get them, or what the best off the shelf electronic spark coils are, or how to drive them. Am currently in Canada.u
The nice thing is however that all of this is entirely being done from scratch, so literally anything can be chosen.
Suggestions welcomed as to what parts and driver boards would work, and where of course the FreeEFI and driver boards can be bought.
Tia,
L.