[stian1979]

Originally Posted by Matra et Alpine

You got any actual figures.
All that I remember about it was platitudes.
ANd nobody says theire idea is a dog

You are AGAIN thinking of only one issue at a time>
The problem is only when you first start up. AS SAID, you would size the battery to manage the peak. You dont' accelerate a car for 20 seconds
Sorry but you're missing the whole point by being single-thinking. Build in what the Stirling engien is doing durign the acceleration of the vehicle and what it is doing durign coast and steady speed ?
Nobody's sayign there are NO batteries but it wouldn't need the SHED LOAD that current hybrids are running

Even if allowed to run at optimim efficiency, then an Otto will be WELL short of the efficiency of a Stirling -- or another "imporoved" combustion engien

First balancer shafts are requried because of the ROTATION rpbblems.
Do you grasp that ?
So it is ONLY reciprocating weight that is the problem and the only part of a Revetec is the PISTON -- no strong conrod or crank out there
So you first recognise that it's a fraction of teh nromal engien weight. So you've done THE MOST IMPORTANT step already which is minimising the mass. Then if necessary they would apply for balance by multiple cylinders -- jstu in teh same way a V8 manages optmimum any paired Revetec piston seupt should.

That's a simplification that only works as long as you're not trygin to maximise the power output or the efficiency. Sadly I believe you've forgotten more than you think
2-strokes are the moust inviromental engines.
BS and you provide the answer yourself - as I had already said.

Rubbish You can't make an oil have long chains to maxinmise lubrication AND burn efficiently. You are thinking of only one thing at a time again.
let's now jsut save me the hassle. You're wrong.

NO it doens't !!!
You are wrong.,
You are NOT thinking of the whole system again>
A crank does not match the optimal piston pressures because of the angles !! This is what the Revetec designer ( and many others over hte decades ) is trying to recover energy better.
Sorry, think about the CRANK positin as well as piston and do the vector force calucaltion and see how much is goin in to provide OUTPUT force.

Because you've NOT actually looked at the force vectors in all the components.
Do it, you will learn and understand.

Yeah but why is a ball bearing coming in to it ?
Do you mean NEEDLE bearings ?
Needle bearings can handle the pressures.
I think you are still thinking of only one thing at a time. Different materials could provide it, perhaps sacrificial. Oil bath coud deliver it at higher speeds onto the mating surface. WOudl still need strong material tho as it won't benefit from pressure build up from rotation the way a crank does.
But as you are not clearly aware the forces beign talked abotu are the SAME as a normal Gudgeon Pin on a piston is handling
So how come it survives there and yet won't here ??
MATERIALS and oil supply -- the challenge will be having ENOUGH pressure to ensure a minium thicnkess of oil to ride on.

No I'm not thinking at one thing at the time, but you are or like to think I am.

If you during aceleration neads to brake down because of a unekspected event and the acelerate again, your batteries would runn empthy befour the stirling would be able to take the load. Why do you think your so smart? don't you think there would be a hybrid stirling on someones model program allready if it was sutch a smart idea or are you one of those that belive there is a big conspiracy to keep up the oil price and sale?

A stirling is relative easy to build and sheap so it's clearly not a good idea since no one used it. I only see them as a way of energy recovery. Maybe you think that this hybrid thing is a new thing, but in the shipindustrie diesel generators running electric motors are a old idea from 1940. It only have advantage in load changing contitions and If the Stirling was a great idea This is probartly the place it would pop up first.

Yes I do understand that 1/2 and 1/2 is the simplefyed version, but do I really have to feed you everything in detail?
I understand why we got balance shafts and I also understand why counter weights are added to the crank. It's to counteract oscilating forces from the piston and 1/2 of the conroad(simplefyed version) How do you plan to fitt them to a revetec crank??? How will you counteract forces with a counter weight on a shaft rotating 1 time for every 6 time the force is aplied?
If you had a 4-cyl the engine would twist so to make vibrations not bother driver or/and pasangers you would nead a flat 8 who the hell would put that into there car?Packaging like you have pointed out yourself.
Just in case you stil don't understand the diference bewen a boxwe and a revetec.

Packaging like you have pointed out yourself.

Nedle bearing's solve one problem, but only one. They still are not that happy about contamination in the oil unlike plain bearings that can handle some of it. They are just like the ballbearing not 100% round and you ad two new disadvantages and that is that they can't handle that high speed's and if they go wrong they can relly go wrong.
If you want to adapt plain bearing's for this aplication how would you do that? How do you want to make the surface big enough to get a hydrodynamical lubrication that will not brake. Maybe you think I only think at one thing at the time and I think you come up with problems instead of sulutions.

Again there is no gain in this construction. The only smal gain is that it can make heat from combustion into work befour it transmits into the cooling system. This is a peoblem that will be solved annyway when the fuel price make ceramics worth there price. I can also ad to the discusion that fuel don't exsplode, but it combust. At the time 40-50% of the stroke is done it's stil hydro carbons burning and ading energy and at this time the convencional crank is at it's maximum angle. so this is energy the revetec will transforme into rotation when it has only 50% of it's optimal angle.

1-1=0

P.S clearly your knowledge about 2-strokes is limited to Honda MB-5 and Yamaha DTR-50.
Did you hear about Cumer, Wickmann, B&W, Sulzer, Detroit Diesel or GM Diesel at all?
About the lubrication oil for cylinders You defently not know what this is about, do you really think that all two strokes use oil mixed in there fuel? Worng! as for using syntetic oil I actualy atended a cource with Mobil Oil where use and qualety of oil's where the ishue. If you can use a syntetic oil you can get a bether lubrication so you can use less oil to do the same job and that will my friend reduce the problem of burned oil. Do some back ground studys befour opening you mouth.