How does a carburetor work? FINAL COPY?
(2012-02-04 15:20:21) 1. Says: Ok, i was watching how it's made and they showed how a carburetor is made. What got me really confused was when they attached the accelerator pump arm. I know that air is more denser than fuel so they made a booster/jet. I understand that a diaphragm pushes the fuel out of the jet into the chamber. What i also understand is that when you press the gas the butterfly discs open. My question is 1. Is the correct? 2. Is the diaphragm and butterfly discs connected? 3. What is the mechanism?Please help and don't put one word answers or stupid owns like "well what do you think?".
Also how does the accelerator pump work?
Mechanical electrical etc
Is there a diaphragm, piston or something else as the accelerator pump?2. Says: The pump, which is usually just a diaphram, sitting under float bowl, will fill with gas and as said, squirts some out when the throttle is pressed. The butterfly opens at the same time and air can flow thru the venturi. Since it takes a second for the air to create a vacuum and suck gas out of the jet, the gas that the pump squirted out keeps the engine running smoothly.
There are youtube videos that explain the operation
http://www.youtube.com/results?search_query=carburetor+accelerator+pump&oq=carburetor+accel&aq=1&aqi=g2&aql=&gs_sm=c&gs_upl=6586l18791l0l21570l16l16l0l4l1l0l333l1973l5.3.1.3l12l03. Says: First thing air is NOT denser than fuel - think about that for a minute - air is gaseous while fuel is a liquid.
When you step on the pedal the butterfly are connected together so both work together.
When you step on the pedal you create a vacuum drawing air in the engine. But as you do so it creates too much air & not enough fuel (correct ratio is about 14 parts air& 1 part fuel) so to get back to the correct ratio the pump gives a small shot of fuel.
It works mechanical with a diaphragm altho some have electrical parts to them.4. Says: The accelerator pump is just that a little mechanical pump on/in the carburetor that is attached to the accelerator pedal through linkage. When you step on the gas it squirts out a little extra fuel so that the engine speeds up smoothly without a stumble effect. Hence the term accelerator pump!
Some use diaphragm pump some use small piston like pumps. To know for sure I would need the brand of carb or make and year of vehicle to know for sure. My 87 samurai has a small piston accelerator pump, the 79 Chevy truck I had had a diaphragm accelerator pump on its quadrajet carb.5. Says: with a name like that you would think you would know. Carbs are complicated. The density of gasoline is alot higher than air by over 700 kg/m3 i believe not the other way around. they made the "booster jet" because when you go WOT there would be a huge delay possible stall without that feature because the engine would go extremely lean without it. and yes everything that moves in the carb is "connected" in some way. that way only the accelerator cable has to be connected for everything to work...other than the choke if it is cable operated and even if it is electric or temp controlled it is usually connected below the throttle cable but still they are all connected together. just look it up on wikipedia....carbs are too complicated and no one on here will type out how they work Tag: How does a carburetor work? FINAL COPY?