How are engines so efficient?

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Topic: How are engines so efficient? (Read 11754 times)

nyet

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	Re: How are engines so efficient? « Reply #15 on: October 10, 2016, 12:07:14 PM »

Quote from: dokalanyi on September 26, 2016, 12:50:58 PM

And the cluster shows between 0.9 and 1.5 when Drive is engaged. If the calculation is right, then engines are still pretty darn efficient

I guess I don't understand what you mean by "darn efficient".


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TijnCU

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	Re: How are engines so efficient? « Reply #16 on: October 10, 2016, 02:47:15 PM »

Sorry to burst your bubble, but a big cargoship with a 2 stroke diesel running of crude oil is way more efficient than any petrol car on the market. That puts things in a strange perspective, doesnt it Grin

Petrol internal combustion is not what I would call super efficient.


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nyet

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	Re: How are engines so efficient? « Reply #17 on: October 10, 2016, 02:50:37 PM »

Quote from: TijnCU on October 10, 2016, 02:47:15 PM

Petrol internal combustion is not what I would call super efficient.

Agreed. A 100% efficient 2.7t should be able to make 1000hp, easy


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nyet

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	Re: How are engines so efficient? « Reply #18 on: October 10, 2016, 06:03:10 PM »

For reference, because this thread is making my head hurt.

https://en.wikipedia.org/wiki/Engine_efficiency


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dokalanyi

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	How are engines so efficient? « Reply #19 on: October 11, 2016, 12:23:24 PM »

I guess what I meant by efficient was, the theoretical calculation which doesn't account for energy loss comes close to the actual observed value. Not efficient as in harvesting energy from fuel


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nyet

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	Re: How are engines so efficient? « Reply #20 on: October 11, 2016, 12:26:24 PM »

Quote from: dokalanyi on October 11, 2016, 12:23:24 PM

I guess what I meant by efficient was, the theoretical calculation which doesn't account for energy loss comes close to the actual observed value. Not efficient as in harvesting energy from fuel

That isn't efficiency, that is science (properly) meeting with reality Tongue

If your fuel trims are near zero, the theoretical value for injector time matches the actual requirement. Nothing miraculous about that; that is the purpose of having an ECU in the first place

It has nothing to do with energy loss. A certain amount of air measured requires a certain amount of fuel mass for stoich.

The engine could be 1% efficient or 100% efficient, that amount is the same.


« Last Edit: October 11, 2016, 12:28:23 PM by nyet »	Logged

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