--water/fuel vapourization thermo-dynamic factors--

 the issue--

   i believe the reason a car requires a choke in the morning, to start well, is not from there being more air in the charge( air-fuel mixture), due to the cold air having less molecules in it...

   but...instead, i suggest that there is, in fact, less gasoline that the air can hold in suspension( vapourized), from the changing "dew-point", of the atmosphere in the vehicle's intake manifold( causing fuel "pooling" in the intake), yes, the air has less collisions per-second( see "molecular harmonics" post), but not less molecules per-cubic inch( i believe air not to be any lighter if the temperature is increased) for this reason, more gas must be added to the mixture, to create a charge( vapourized fuel), rich enough, to allow fuel/air to reach the combustion chamber, in proper proportions, and ignite...( without the fuel "dropping out of suspension", in the vapour)--

   this principal is shown in water vapour as well, with the concept of a "dew-point", i feel that fuel vapours also behave in this manner, and that there is a "fuel vapour dew-point", with similar tendencies as that of water--

  --the numbers--

    liquid "dew points"( thermo-dynamics) calc--


     (grams x milliliter)
       (root liquid's)               (cubic inches)
          (weight)          %           (of air)        =         (humidity)
           10 x 1           %                1           =               10


                                     (# of collisions)                          (root liquid's)
                                        (per sec)                             (condensate temp)
           (humidity)    +        (temp)        -       (psi)    =      (dew-point)
                10          +          20f           -         1      =           29f


    i feel that lower numbers of collisions per-second( slower molecular movement), causes there to be larger gaps between the moving molecules, reducing molecular surface tension( see "molecular harmonics" post), causing the heavy "root liquid's" molecules to "drop out of suspension" in the vapour( at lower temps), or at higher temps, due to the weight of each droplet in suspension being too heavy to remain aloft( vapourized)--

   also, i feel that if greater psi( pressure), is put on the air , or atmosphere, suspending a "root liquid's" weight( per-cubic inch), the additional pressure compresses the "root liquid" from the suspension( vapour), to condensate--

    --this calc shows the "dew point"( temp of condensate), of any liquid, in suspension( vapour), and may be of use to auto makers, suppliers, or users, of gasoline/diesel fuels( quantifying the amount of ethanol that may added to gas, with good vapourization, is an example)--

  i have not "real-world" studied this calc yet, but it looks good on paper...

  --best wishes, john kruschke--

 (cs)