What does the 3.0 liter engine?

[RyanHeo]

Hi, guys.
Suddenly I just wonder the meaning of the engine size like my car is 3.0 liter, brother's truck 5.8 liter. What does the number mean? I'm studying about my engine because I have plan to swap my engine next year. Would let me know what the number told me?

Thanks.

 

[timish]

The number is the displacement of the cylinders, how much volume the engine capacity is.

Check www.wikipedia.org for more

 

[RyanHeo]

I knew the V6 or V8 mean how many cylinders there are.
What I want to know the the number of liter.
If 3.0 liter engine mean does it need to 3.0 liters of gas to run? I tried to find the meaning of the liters but I couldn't.
Thanks.

 

[dwendt44]

Multiply liters by 61 to get cubic inches.
3.8 X 61 = 231.8. Rounded to 232c.i..
1 liter is 1000 c.c.

 

[AcuraTech]

3.0 = 3000 Cubic Centimeters which is the volume of the combustion chambers of the engine. So therefore a bigger number would represent a bigger engine. People pretend this is the end all be all, but it isn't. It's just a basic measure. More important is how efficient the engine is.

 

[Camu Mahubah]

http://en.wikipedia.org/wiki/Engine_displacement

Click it. This should help.

 

[Anduril]

That number is basically the size of the working (combustion) area of the engine. While it's generally true that larger engines produce more power and require more fuel to do so, there are some exceptions to that as well.

 

[va3ux]

3.0 liters is the approximate total *volume* (not area) of all 6 cylinders. The volume of one cylinder is volume of the cylinder when the piston is a bottom dead center. The height of the cylinder is formed by the top of the piston (at bottom dead center) and the top of the block. And of course volume is measured in cubic centimeters (1000 cc's = 1 liter) or cubic inches.

The volume of the combustion chambers is a whole 'nother matter. Combustion chamber volume is very small compared to the cylinder volume. I don't know whether the manufacturers include combustion chamber volume in the total volume spec for the engine, or not.

Please ignore the replies that state the engine displacement is the "area of the combustion chambers" or the "volume of the combustion chambers". Neither of this is correct.

 

[Anduril]

I said combustion area; i.e. the whole of the engine where combustion takes place.

 

[mechtech2]

Look at it like lung capacity.
More displacement is like bigger lungs - more air in and out.
In a car, this usually equates to more power.

 

[va3ux]

Quote:

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I said combustion area; i.e. the whole of the engine where combustion takes place.

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I saw what you said. That's why I said what I said.

(Can anybody follow what I just said !?)

 

[XS650]

Quote:

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Quote:

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I said combustion area; i.e. the whole of the engine where combustion takes place.

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I saw what you said. That's why I said what I said.

(Can anybody follow what I just said !?)

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I follow it.

This is a technical forum. It's a shame when technical words are tortured, misused and abused, even when they just get waterboarded.

 

[RyanHeo]

Thanks guys.

 

[javacontour]

Quote:

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3.0 liters is the approximate total *volume* (not area) of all 6 cylinders. The volume of one cylinder is volume of the cylinder when the piston is a bottom dead center. The height of the cylinder is formed by the top of the piston (at bottom dead center) and the top of the block. And of course volume is measured in cubic centimeters (1000 cc's = 1 liter) or cubic inches.

The volume of the combustion chambers is a whole 'nother matter. Combustion chamber volume is very small compared to the cylinder volume. I don't know whether the manufacturers include combustion chamber volume in the total volume spec for the engine, or not.

Please ignore the replies that state the engine displacement is the "area of the combustion chambers" or the "volume of the combustion chambers". Neither of this is correct.

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This is correct. Combustion chamber is not the same is displacement.

Displacement is the volume displaced by the movement of the pistons in the cylinder bore.

Or as was stated in the wiki link:

Quote:

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Engine displacement is defined as the total volume of air/fuel mixture an engine can draw in during one complete engine cycle; it is normally stated in cubic centimetres, litres or cubic inches. In a piston engine, this is the volume that is swept as the pistons are moved from top dead centre to bottom dead centre.

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