Feri Pribadi webdevelopers AKU Belajar: carburettor

1 Februari 2013

carburettor

carburettor 


Category: ARTICLES, Info & Tips, Automotive, Tips & Tricks

Carburetor, a tool that in English is called carburetor which means fogging. That is a part or component of a motor that works to change the fuel from liquid or gaseous or liquid into spray / smog.Where is the carburetor, should be able to mix the fuel and air with a special ratio is 1: 14.7, means mixing with a scale, 1gram fuel with 14.7 grams of oxygen ...Why turn up 14.7 points ....????Yup, the rate of 14.7 in the can from the stoichiometric combustion of the fuel tank with oxygen.C7H16 + 14.7 O2 -> 7 CO2 + 8 H2O.It is a simplification of the chemistry between gasoline combustion with oxygen ...-* Maximum output power ratio.On the machine that seseungguhnya, if we replace the air and fuel ratio of about 13: 1, or may be a mixture of rich, then we will be the ratio of the maximum power output.* Ratio of maximum fuel efficiency.Meanwhile, when we change the ratio of the fuel in the opposite direction, that is 16: 1 or poor. Then we will see the ratio of the maximum fuel efficiency.From 2 to the above, we can conclude, if we want to fish greater power, then we will be playing in the ratio of rich ... But if we want that economizes fuel efficiency, then we will be playing in poor mix.Very hard to get a mix of poor but powerful ... Definitely one to be sacrificed ...Carburetor Basic Principles.------At the suction step, wherein the piston moves from TDC toward BDC resulted sucked air through the air filter, then through the carburetor and into the cylinder. Using a negative pressure or a vacuum from an enlarged chamber when the piston drops down, then when the air flow, the carburetor Meng-atom-ization of fuel.In a carburetor, there is an area that is experiencing a narrowing funnel or what we call "venturi", when air passes through this venturi tunnel, the air velocity in the venturi area will increase, but instead the air pressure will decrease ...By law bernaulli once I learned that, where ...P / € Vkuadrat + / 2 + g.Z = constantP = pressure (kPa)V = velocity (m / s)Z = height (m)So it is clear that the velocity is inversely proportional to the pressure in a pipe flow.Now, with the venturi principle had led to venturi area decreased pressure, even under atmospheric pressure environment .. Well this pressure difference causes the energy difference between the area venturi carburetor with fuel bowl area ...That the energy will flow from the high point to a low point ...Pressure on gasoline carburetor bowl is normal atmospheric pressure, whereas the pressure in the venturi area under atmospheric pressure .. So moved was the fuel of gasoline in the carburetor bowl to the venturi area that has a lower pressure ... so that gasoline will go up through the main jet and will ter-atom-ization into mist or spray.Types of Carburetors.-----For variable venturi carburetor manifold, the diameter of the venturi is adjusted by throttle valve (skepticism).Variable venturi type is divided into two types of construction of the venturi.1.Tipe PV or piston valve (manual skepticism).2.Tipe CV or constant velocity (vacuum).Carburetor Type PV.In some variable venturi type carburetor, opening in the venturi area of ​​change with the rising and falling piston valve or skepticism.In this PV type carburetor, skepticism or piston valve also acts as a throttle valve to regulate the amount of air flow.When the clip operated throttle and throttle valve (skepticism) rise to the top, the area of ​​the opening of the venturi increases so that the air flow up.Negative pressure that is generated by the velocity of the air flow at the venturi sucking fuel through the nozzle play. When the throttle clip (gas) is returned, then skepticism will go down by the pressure of the spring skepticism.Carburetor CV TypeApart from that form venturi piston, the amount of air flow is controlled by a butterfly plate (like a circular plate choke carburetor). When we pulled the gas, it will open the butterfly plate, causing increased air flow and skepticism (throttle valve) will be raised due to the negative pressure in the venturi area ... At the same time the fuel nozzle out through play.In this type, the air velocity in the venturi kept so nearly constant.In two carburetors has its own effectiveness.Carburetor type of PV has good acceleration, but the composition of the gas mixture is not ideal .. While the CV carburetor has an ideal blend composition but less good for acceleration.

http://racingtechnology.blogspot.com/2009/10/karburator.html

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