Free Piston range extender

[AER]

motorlad said:

two-stroke free piston does not have the dead pumping loses of piston/crank arrangements. Anyone who knows about engines will tell you that. And power is generated on both strokes of the piston in Toyota's free piston engine. You cannot understand something so simple.

Clearly power cannot be generated on both strokes of the two-stroke cycle even with the Toyota free piston engine magic applied. The power is only available from the expanding gasses on one stroke. On the other you have power absorption by the gas exchange and gas compression. Without any flywheel effect anywhere (masses, springs, what-have-you) chances are the "generator" will have to turn into a "motor" to drive the compression stroke. In any case, the single phase sinusoid will be a very wonky looking thing indeed making rectification an EE's nightmare!

motorlad said:

Get out the business. Have you tried delivering milk?

Is this an insult or a recommendation? Did someone put the business away somewhere? If you're an english teacher, I'd suggest you take up milk delivery instead. They usually come with Victorian EVs, you know!

[Auntieroll]

English teacher, his/her posts sound more like an English student!,certainly not a student of Engineering.

Motorlad clearly values modern hope over "antiquated Victorian" engineering knowledge,of which he is clearly grossly ignorant.

Perhaps when he outgrows his short trousers he may understand something of the fundamentals of technology he
advocates instead of blindly regurgitating PR "puff" that he read while drinking his school milk.

Edited by Auntieroll on Wednesday 14th January 09:35

[anonymous-user]

motorlad said:

two-stroke free piston does not have the dead pumping loses of piston/crank arrangements.

It has exactly the same "Pumping losses" as just like a piston engine with a crankshaft, it has to fill it's cylinder with air, before it can compress it.

motorlad said:

And power is generated on both strokes of the piston in Toyota's free piston engine.

As AER mentioned, no it isn't. The fuel is only burnt, and heat released and work done on the downward firing stroke. In the case of this engine using an air spring, some of that energy release is "stored" in the compressed air, used to return the piston to the top of it's stroke. Unfortunately, as this cannot be a 100% adiabatic process, some of that energy is lost to heat, and so this it not 100% efficient. (just like with a conventional rotational crankshaft, which stores some of the firing energy in it's inertia, and uses that to return the piston to the top of it's travel.

motorlad said:

Anyone who knows about engines will tell you that.

It is extremely clear that you know nothing about engines unfortunately.

[motorlad]

AER said:

motorlad said:

two-stroke free piston does not have the dead pumping loses of piston/crank arrangements. Anyone who knows about engines will tell you that. And power is generated on both strokes of the piston in Toyota's free piston engine. You cannot understand something so simple.

Clearly power cannot be generated on both strokes of the two-stroke cycle even with the Toyota free piston engine magic applied.

But it is. When the piston returns it creates electrical power. That is obvious. Of course, the gas spring will absorb some energy but will throw the piston back up producing electrical power. No exploded fuel throws the piston back up, it is all from the energy released in the one combustion chamber at one end (in the Toyota engine). In a 4-stroke cycle in the antiquated technology you adore, three out of the four strokes are a complete drag adding to the hopeless efficiency.

Rectification is not a nightmare as free piston Stirlings do just this and are available on the market.

AER said:

Is this an insult or a recommendation?

Recommendation. You must be impressed by my English. Thank you.

Auntieroll said:

English teacher, his/her posts sound more like an English student!

Another one impressed. Thank you.

I clearly value modern engineering over "antiquated Victorian" engineering for sure. Not to see that the current piston/crank engines are an anachronism does display poor knowledge and ignorance. Please keep up with current events as you may have to change careers.

Thinking just slightly out of the box is something which is beyond some. That is sad.

Max_Torque said:

motorlad said:

Anyone who knows about engines will tell you that.

It is extremely clear that you know nothing about engines unfortunately.

Your lack of basic conceptual engineering thought I find amazing, especially from people who say they work in the business. That is sad.

Edited by motorlad on Wednesday 14th January 16:43

Edited by motorlad on Wednesday 14th January 16:45

[anonymous-user]

ok, I'm out.

[motorlad]

"The most difficult subjects can be explained to the most slow-witted man if he has not formed any idea of them already; but the simplest thing cannot be made clear to the most intelligent man if he is firmly persuaded that he knows already, without a shadow of doubt, what is laid before him."
-- Leo Tolstoy

[Pumaracing]

Play nicely children! I'm not sure why this topic is so contentious. It seems to have technical merit but has become the victim of keyboard warriors and inflated egos.

[chuntington101]

stevieturbo said:

Batteries are improving ???

My phone still doesnt last a bloody day on a charge !

I think we all need little nuclear reactors in our cars, then we can use electric

Haha I thought that when I read it! However that's probably due to the power of the phones now rather than the battery.

[AER]

motorlad said:

"The most difficult subjects can be explained to the most slow-witted man if he has not formed any idea of them already; but the simplest thing cannot be made clear to the most intelligent man if he is firmly persuaded that he knows already, without a shadow of doubt, what is laid before him."
-- Leo Tolstoy

Indeed. You seem convinced you understand power and energy, however a statement like this below makes it obvious you have no feel for how the different forms of energy flow through a system.

motorlad said:

But it is. When the piston returns it creates electrical power. That is obvious. Of course, the gas spring will absorb some energy but will throw the piston back up producing electrical power. No exploded fuel throws the piston back up, it is all from the energy released in the one combustion chamber at one end (in the Toyota engine).

[stevieturbo]

Pumaracing said:

Play nicely children! I'm not sure why this topic is so contentious. It seems to have technical merit but has become the victim of keyboard warriors and inflated egos.

I was actually wondering where you were....as it sounded like some abuse was needed lol

It's something Ive never heard of before, and it looks interesting whether good or bad.

Every setup has good points and bad, but at least people are still looking for and trying to develop different power sources.

But I still really like my V8

[The Vambo]

A bit late to the party I know but I would bet my bks that the OP is TheFuture from the end of this thread,

http://www.pistonheads.com/gassing/topic.asp?h=3&a...

Same arguments with the same posters about the same subjects.

[dudleybloke]

The Vambo said:

A bit late to the party I know but I would bet my bks that the OP is TheFuture from the end of this thread,

http://www.pistonheads.com/gassing/topic.asp?h=3&a...

Same arguments with the same posters about the same subjects.

My thoughts too.