I’m not sure if this is outdated knowledge, but in order for the liquid fuel to ‘burn’ in the combustion chamber (CC) of an ICE, it must have oxygen attached. One major function of a carburetor is to mix the liquid droplets with O2 from the air. The problem is that the liquid fuel (regardless of how small the droplets are) has considerably more mass than the O2, and if there are any sharp bends in the intake manifold, the O2 has less inertia and can make those turns whereas the heavy liquid fuel droplets cannot, and you get fuel-air-separation. Liquid droplets w/o attached O2 will not ‘burn’. There are several ways that the industry has reduced the fuel-air-separation problem:
- Fuel injection which does a much better job of atomizing the liquid fuel, and injecting it closer to CC so less likely to get separation. - Intake manifolds which eliminate (as much as possible) any bends in the passageways. -Mark From: Eric Walker [mailto:eric.wal...@gmail.com] Sent: Sunday, April 22, 2012 10:05 PM To: vortex-l@eskimo.com Subject: Re: [Vo]:Ignition On Sun, Apr 22, 2012 at 9:59 PM, <mix...@bigpond.com> wrote: Actually, the liquid gasoline never burns. Only vapor burns. This is true in an engine as well. The smaller the droplets, the more easily they evaporate and provide the necessary vapor. Does this follow from the fact that the reaction is an oxidation reaction, in which oxygen is required? Since insufficient oxygen is contained in the liquid, only vapors oxidize? Eric
