Carburetor equipped vehicles have been around for ages. Its simple framework means a carb is easier and more cost effective to manufacture and maintain. Hence, it has been the ideal fuel delivery system for engines since the late 1800s.
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The primary job of a carburetor is to mix air and fuel in a certain ratio and deliver it to the combustion chamber (or cylinder). A carburetor works by intercepting the flow of air to your motorcycle’s cylinder. Basically, after the piston compresses it creates a low-pressure vacuum which pulls in the air-fuel mixture through a tube in the carburetor. This “tube” is designed to become narrower towards the end which in turn increases the pressure of the air flowing through it. The low pressure also forces fuel to be pulled in from a tiny reservoir in the carburetor which then mixes with the air flow, thus creating an air-fuel concoction that burns in the cylinder. This phenomenon is called the Vacuum Venturi Effect.
On the downside, a carburetor is purely mechanical and doesn't rely on an Electronic Control Unit (ECU) to monitor and tweak the system. In fact, the air-fuel mixture in a carburettor is constant and can only be tweaked or altered by physical adjustments to the carburetor jets. Moreover, a carburettor cannot understand and change the air-fuel mixture according to a particular situation. For example, you would notice a drastic drop in power if you were to climb high altitudes with the bike where the air is thin. At those heights, the engine requires more oxygen for combustion which isn’t supplied by the carb, resulting in a drop in power. But as you head back to sea level, the system starts functioning normally again.
Carburetors are long-lasting and are made of lighter materials. Also, they do not require any electrical components for installation and are thus easier to install and maintain.
A fuel injection sprays calculated spurts of fuel directly into the combustion chamber. The fuel is forced through a small nozzle under pressure in the combustion chamber where it ignites and produces the power stroke. Basically, during combustion the piston compresses the air-fuel mixture in preparation for ignition which is know as a power stroke. Fuel injection systems are inherently more precise, as they mix air and fuel better and deliver them in finely atomised particles. The ECU along with multiple sensors calculate variables to constantly adjust the exact amount of air and fuel mixture required to be burned in the cylinder. This results in better fuel efficiency and swifter response from the engine.
#Carburetor #FI #Differences
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1 окт 2024
