[jhein]

https://www.aquariusengines.com/technology/

[jhein]

Only 20 parts. Only 1 moving part. Air cooled. No oil. 57 mpg. Service once every 50k miles. Wow.

https://www.autocar.co.uk/car-news/t...ydrogen-engine

[JSchmitz]

That is amazing, out of the box, engineering there! Thanks for posting it!

[TAKerry]

Looks like the same principle as the Knight sleeve valve engine.

[Formulabruce]

When I was a we Lad, my grandfather took me to a fair in upstate PA. He showed me some Hit and Miss engines that were mesmerizing to me to watch. He said something that has stuck with me. He said " look at the work it is doing AFTER you hear the " hit" . It was on a belt running a corn grinder for chicken feed, and running a DC car generator which was charging a battery with some lights hooked up. This may have been more efficient than anyone knew at the time.
The linear engine posted here looks like something BMW would have invented. That said, to make electricity, that linear motion has to be converted to a rotation and that has not been shown.
The 2 stroke principle is solid, has been used in Diesel engines for over half a century.
I would like to see those " bearings" that look like bushings.
I can see the rebuild kit now.. sleeve for rod, nrw rings and new " bearings". I wonder what it runs at for speed ( not RPM) AND how many watts its capable of.
Just as an aside, GM put Roots blowers on 2 strokes to improve power long ago..
This could be a great invention, and supplement / charge the new Sodium ion batteries which hold 10x the power of current Lithium ones.

[jhein]

Originally Posted by Formulabruce

... to make electricity, that linear motion has to be converted to a rotation and that has not been shown.

I was wondering the same thing but apparently there are linear generators. I just found this stuff. Very interesting.

http://www.wolfhartindustries.com/linearg1.htm

https://youtu.be/0_QBl6-_jJU

[jhein]

In the video they show a cylindrical part that goes on one end of the motor that the piston rod goes into. On the generator component they show a corresponding cylinder on the end of it that sits up against the cylinder on the engine If there is a magnet on the end of the piston rod and another magnet in the cylinder on the generator, that would create the reciprocating, linear motion in the generator needed to create the field.

https://youtu.be/gUgv2_v2TPc

[jhein]

OK, scratch what I said about the magnets above. If you watch the original video I posted at the 54 second mark, at the very end it shows how the engine is coupled to the linear generator.

https://www.aquariusengines.com/technology/

[Half-Inch Stud]

No cooling system shown, so the hollow rod must have coolant running to the piston. No Skirt to keep piston rings set will promote metal joint fatigue at the Rod.

Oil lube: like a giant exhaust valve stem. Might be fickle for reliability. Sealing vs controlled wipe

Overall, the CAD has purpose to solicite investment. A real working engine is needed for stress testing to dial-in (develop) the cooling flow, lubrication, and attain/mitigate failure modes. That is where my enthusiasm is high if involved, and quite low if not involved.

The "reciprocating" aspect has to deal with a very high decelleration such as a crank rounding BDC, to avoid shock. Well, i didn't see the solution so have to assume there is no solution. If there were a solution then the ricipro solution would/could re-apply itself to traditional Internal conbustion engine.

Yet the strored energy in a flywheel is all the reason why the reciprocating crankshaft solution is quite good. I would like to see this linear engine's linear power take-off design solution, and understand if it is with or without a flywheel effect.

[jhein]

Originally Posted by Half-Inch Stud

No cooling system shown, so the hollow rod must have coolant running to the piston. No Skirt to keep piston rings set will promote metal joint fatigue at the Rod.

Oil lube: like a giant exhaust valve stem. Might be fickle for reliability. Sealing vs controlled wipe

Overall, the CAD has purpose to solicite investment. A real working engine is needed for stress testing to dial-in (develop) the cooling flow, lubrication, and attain/mitigate failure modes. That is where my enthusiasm is high if involved, and quite low if not involved.

The "reciprocating" aspect has to deal with a very high decelleration such as a crank rounding BDC, to avoid shock. Well, i didn't see the solution so have to assume there is no solution. If there were a solution then the ricipro solution would/could re-apply itself to traditional Internal conbustion engine.

Yet the strored energy in a flywheel is all the reason why the reciprocating crankshaft solution is quite good. I would like to see this linear engine's linear power take-off design solution, and understand if it is with or without a flywheel effect.

They say it's air cooled and uses no oil. Uses some type of graphite rings? They also say that it is "low frequency". The mass of the piston is small and the rod is hollow so also low mass. The concept of a flywheel is obviously good for a rotating engine that has to turn something else to do work. I would guess that this engine is very low power. A traditional generator engine needs power to turn the flywheel and generator and maintain RPM under varying load. Since this generator doesn't rotate, it just pushes a lightweight shaft back and forth, it just doesn't take much power to do that.

[JSchmitz]

Originally Posted by Half-Inch Stud

No cooling system shown, so the hollow rod must have coolant running to the piston. No Skirt to keep piston rings set will promote metal joint fatigue at the Rod.

Oil lube: like a giant exhaust valve stem. Might be fickle for reliability. Sealing vs controlled wipe

Overall, the CAD has purpose to solicite investment. A real working engine is needed for stress testing to dial-in (develop) the cooling flow, lubrication, and attain/mitigate failure modes. That is where my enthusiasm is high if involved, and quite low if not involved.

The "reciprocating" aspect has to deal with a very high decelleration such as a crank rounding BDC, to avoid shock. Well, i didn't see the solution so have to assume there is no solution. If there were a solution then the ricipro solution would/could re-apply itself to traditional Internal conbustion engine.

Yet the strored energy in a flywheel is all the reason why the reciprocating crankshaft solution is quite good. I would like to see this linear engine's linear power take-off design solution, and understand if it is with or without a flywheel effect.

Maybe the decel is mitigated by a cushion like used in air cylinders. There's a small piston on the rod that closes off the main exhaust port. The remaining air has to pass through an adjustable orifice. Kinda like shock valving.

[Tom Vaught]

I have seen 50 of these types of engines over the years presented to corporations:
They are all "Looking for large amounts of money", lol).
All I will say about these types of engines.

Another one: https://www.trussty.com/2015/12/the-...f-huttlin.html

Tom V.

[george kujanski]

For a generator, there needs to be relative motion of a conductor with a magnetic field. Doesn't matter which moves, the conductor or the field, or the type of motion. linear or rotary, as long as the conductor sees a time-rate-of-change of the field.

george

[Half-Inch Stud]

Originally Posted by Tom Vaught

I have seen 50 of these types of engines over the years presented to corporations:
They are all "Looking for large amounts of money", lol).
All I will say about these types of engines.

Another one: https://www.trussty.com/2015/12/the-...f-huttlin.html

Tom V.

The study of air pumps could be a life-long hobby, or some folks a career. Some folks even get good at it.

So i was impressed by this angel labs engine when it came out. https://www.angellabsllc.com/mytengine.html
There was an excel file of the engine that i received, that the excel contsined a wire drawn engine that rotated (animated in excel) and ran so you could study analytically. I was amazed at the excel doing mechanical design animation! Anyway, i think the engine needs an external scotch yoke to make the pistons return for inhale and compression to happen.

Wonder if the Thread Posted engine has a working metal model?