Technical Discussion on Power re:Honda engines

modern combustion engines are allready extreemely efficient.

-2ds

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Originally Posted by 2ds

modern combustion engines are allready extreemely efficient.

-2ds

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Really?

Last time I checked they were around the 25% efficient mark.......wouldn't call that efficient!

you see it doesn't sound efficient but think about it this way, how far can you move your car (say 1 ton of steel and plastic) with one litre of petrol ? maybe 10km with very average fuel cnsumpion ?

now i'll give you 1 litre of milk and we'll see how far you can push your car ?

electric motors have much greater effciency at 90%+ but current battery technology is woefull as far as energy density goes. as soon as someone creates a really good battery we can kiss internal combustion good bye..

-2ds

petrol engines are around 25% efficient.....they loose most of the other 75% as heat. Can't really compare petrol to milk ;)

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Originally Posted by wynode

Really?

Last time I checked they were around the 25% efficient mark.......wouldn't call that efficient!

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:thumbsup:


even then, 25% is pretty high. I did tests on a holden camira engine (yes i know holden) and it came up 18% efficient. It sounds good saying you can move a car and passengers 400kms from a tank of petrol but it's not.

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Originally Posted by Phantasm

I currently dont see any engine that features fuel efficiency, linear power production across the rev range, aswell as high levels of torque across the rev range.

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That's true, less fuel gives a softer bang so yeah, less torque.

[QUOTE=Savant

That's true, less fuel gives a softer bang so yeah, less torque.[/QUOTE]


not always maximus

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Originally Posted by wynode

petrol engines are around 25% efficient.....they loose most of the other 75% as heat. Can't really compare petrol to milk ;)

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25% is high and my point is still valid. the fact that you can move so far on so little fuel is very important. there is litereally nothing better given range needs and effciency needs.

think about the fact that we are also converting a liquid into mechanical energy to move the car. how much effciencydo you expect ?

-2ds

on 7 beers, u could move like a whole car urself ads :) .... plus two rims ;)

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Originally Posted by 2ds

25% is high and my point is still valid. the fact that you can move so far on so little fuel is very important. there is litereally nothing better given range needs and effciency needs.

think about the fact that we are also converting a liquid into mechanical energy to move the car. how much effciencydo you expect ?

-2ds

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Not really converting liquid into mechanical energy. The liquid is going under a chemical change (liquid to gas) and the result of that moves the car. And 25% is not high at all! 25%, come on. only 1/4 of all available energy is being used! The rest goes to heat, noise, exhaust fumes etc. Big waste!


Andy, i don't know of any case where less force gives higher toque. But i haven't seen many of your experiments heh.