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pgfpro 06-15-2022 11:04 AM

Fuel drop size pic 45mpg visualization
 
1 Attachment(s)
I was wondering what the amount of fuel would look like on my 2.0L engine while getting 45 mpg. This is for one cylinder, one cycle.

Pretty darn crazy how small it is. ;)

This weekend I'm going to test what the amount of heat it takes to get full atomization on my fuel generator.

oil pan 4 06-15-2022 11:18 AM

Seems like a lot. How much does it weigh?

pgfpro 06-15-2022 11:40 AM

1 Attachment(s)
Quote:

Originally Posted by oil pan 4 (Post 669612)
Seems like a lot. How much does it weigh?

Crap nice catch that was the wrong pic lol

freebeard 06-15-2022 12:03 PM

Nice wood finish in the background.

oil pan 4 06-15-2022 04:23 PM

Now I can see that being less than 15:1 of the air in a 250cc cylinder at around 1/2 atmospheric pressure.
1L of air weighing about 1gm, but it's only half an atmosphere, each cylinder is 1/4 that, should be looking at about 0.008gm or less of fuel there.

pgfpro 06-15-2022 08:11 PM

Quote:

Originally Posted by freebeard (Post 669614)
Nice wood finish in the background.

LMAO

pgfpro 06-15-2022 09:36 PM

Quote:

Originally Posted by oil pan 4 (Post 669626)
Now I can see that being less than 15:1 of the air in a 250cc cylinder at around 1/2 atmospheric pressure.
1L of air weighing about 1gm, but it's only half an atmosphere, each cylinder is 1/4 that, should be looking at about 0.008gm or less of fuel there.

Here is the math I used.


33:1 AFR
100kPa Intake pressure
4.75 lbs/min total air
0.144 lbs/min total fuel or 65.41 grams/min total
65.41 grams/60 to get seconds = 1.09 grams/sec total for all four cylinders

2800rpm/2 = 1400 cycles per minute
1400/60 = 23.33 cycles per second
1.09grams/sec / 23.33 = .0467grams for 1 cycle all four cylinders
.0467grams/4cylinders =.0117grams for one cylinder and one engine cycle.

I then used a calc online for compounds and it converted .0117grams to 0.01 milliliters for petrol. I then looked up IV gtt numbers and found that 11 drops = 0.55ml.

I tried to simulate the IV drops so its probably not to the gnat's ass lol

freebeard 06-15-2022 11:11 PM

Quote:

LMAO
I was completely serious. The 'wrong' picture had a black finished frame. This one has a really tight miter joint.

If you zoom in and fill the frame I'd be less likely to go off topic.

pgfpro 06-18-2022 12:31 PM

2 Attachment(s)
Quote:

Originally Posted by pgfpro (Post 669611)
I was wondering what the amount of fuel would look like on my 2.0L engine while getting 45 mpg. This is for one cylinder, one cycle.

Pretty darn crazy how small it is. ;)

This weekend I'm going to test what the amount of heat it takes to get full atomization on my fuel generator.

Well just finished my fuel atomization test. I used 87 pump E10 gasoline. At 120*F full visible droplets right side pic. At 252*F no visible droplet or even fog left side pic, so I would say it's in a gas state.


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