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Finding The 100 MPG Carburetor Or What is 100% MPG?
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dot  The graphic below is courtesy of [http://www.fueleconomy.gov/feg/atv.shtml].  Go to that page for detailed info on all of the losses.
dot  Free MPG form for tabulating your car's Miles Per Gallon.  www.neprimer.com/ePress/articles/2007/MPG.pdf


     This calculation is only a "What if" because the chart does not show the actual Work Out as a percentage.  It only shows the "losses".
    Assuming the "TOTAL Work Output" = 5.8 % , then let's assume that that equals 20 MPG and that 1 gallon of gas costs $3/Gal. and where Gasoline: US gallon =  HHV = 125,000 Btu/gallon [HHV = Higher Heating Value.].
      [ 20 MPG out / 5.8 % out  = 3.448 mpg / 1.0 % .  And 1.0% of $3 = $0.03 .  In other words:  1.0% = 3.448 mpg and = $0.03]
    Then filling in the table from left to right:

#########
 
LOSSES
 
MPG
Cost/G
BTU's
(k)
Total In:
100.0%
344.8
$3.00
125.0
    Standby/Idle Losses
 - 17.2%
   
- .516
-21.5
    Accessories  Losses
 -  2.2%
 
-2.75
    Engine Losses:
 - 62.4%
  -81.8%
-282.1
-2.454
-78.0 
Driveline In:
   18.2%
 
    Driveline Losses: 
 -  5.6%
 
    Drag Losses: 
 -  2.6%
 
    Rolling Losses:
 -  4.2%
 -12.4%
   -42.7
  - .372
-15.5 
TOTAL LOSSES:  
-94.2%
-324.8
-2.826
 -93.5 
20 MPG
$ .174
 31.5 
If "TOTAL Work Output" = 5.8%  = 20 MPG = $ .174

    Again, this says that a gallon of gas in a "20 mpg" car typically expends 94.2% or 324.8 mpg and $2.82 of $3.00/gal. to "losses".

    If the 1000° F exhaust gases were used for auxiliary steam engine propulsion with the same losses, what would be the resulting MPG?
    Before you think you are going to get something for nothing, you should consider the process of "Diminishing Returns".  In this example this says that if you get auxiliary steam power out, it will reduce the fuel required to go from A to B; therefore, the exhaust gasses are less and the auxiliary steam power available will be less.  Here's a patented example: http://en.wikipedia.org/wiki/Crower_six_stroke ; but simpler methods might be available.

Personal Notes on Hydrogen blended with gasoline for internal combustion engines.
  :
[0.]    
Video Link of Genepax's Water Powered Car from Reuters. Accessed June 15, 2008  [I think they use microwaves to split H2O b/c they say they don't use a cataylist.]

[1.]     "The burning of conventional fuels such as petrol (gasoline), wood, and coal converts the fuel into substances with less energy (see enthalpy of formation).  Energy is released.   In the case of most fossil fuels, combustion can be represented with the following chemical equation:
 CH4 + 2 O2 → 2 H2O + CO2     Water is a waste product."

     "Spontaneous chemical processes do not create energy, they release it by converting unstable bonds into more stable bonds and/or by increasing entropy.  Water is such an abundant chemical compound in part because it has very stable bonds that resist most reactions.  In order for water to participate in a reaction that produces energy, high energy compounds must be added to carry the current and make H2O bonds easier to break.  For example, it is possible to generate the combustible fuel hydrogen by adding sodium bicarbonate [NaHCO3.] to water.   See [3.] below.

[2.]     "As already noted, water, particularly when ions are added (salt water or acidic water) can be electrolyzed (subject to electrolysis). When driven by an external source of voltage, H+ ions flow to the cathode to combine with electrons to produce hydrogen gas in a reduction reaction. Likewise, OH- ions flow to the anode to release electrons and an H+ ion to produce oxygen gas in an oxidation reaction.
      In molten sodium chloride, when a current is passed through the salt the anode oxidizes chlorine ions (Cl-), which release electrons to the anode. Likewise the cathode reduces sodium metal (Na+), which accept electrons from the cathode and deposits on the cathode as sodium metal. valence shell.  Table Salt as the catalyst. \/
      NaCl dissolved in water can also be electrolyzed. The anode oxidixes chlorine ions (Cl-), and Cl2 gas is still produced. However, instead of sodium metal, aqueous sodium hydroxide (NaOH) is produced, which stays dissolved in the water. Some of the water will also be electrolyzed, producing H2 gas.  The oxygen is found in the hydroxide ion which combines with the sodium ions to make the sodium hydroxide.

The net equation is: 2 H2O (l) + 2 NaCl (aq) --> Cl2(g/aq) + 2 NaOH (aq) + H2 (g)"   [http://en.wikipedia.org/wiki/Electrolytic_cell ]
          (l) = liquid ; (aq) = aquious ? ;  (g/aq) = gas/aq? ;  (g) = gas

[3.] The Electrolysis of Water ;  chemical equations with explanation.
[4.] Sodium bicarbonate  ; as the catalyst;  "is the chemical compound with the formula NaHCO3."
[5.]  List: http://www.rexresearch.com/auto2/hydrassist.htm ;
[6.]  Brown's Gas ; http://peswiki.com/index.php/Directory:Brown%27s_Gas ;

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Finding The 100 MPG Carburetor Or What is 100% MPG?  The answer is dependent upon the power conversion efficiency of your vehicle and your driving habits.
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