flooded machine is an internal combustion engine that has been given a very rich mixture of air fuel that can not be turned on. This is caused by a mixture that exceeds the explosive upper limit for certain fuels. The engine in this condition will not start until a very rich mixture has been cleaned. It also allows the machine to stop operating due to this condition.
Machine flooding is a common problem with car carburettes, but newer fuel injection is immune to problems when operating within normal tolerances. Floods usually occur when starting, especially in cold conditions or because the accelerator has been pumped. This can also occur during early heat; High temperatures may cause fuel in the carburetor's floating space to evaporate into the inlet cuff, causing the air/fuel mixture to exceed the upper explosive limit. High-temperature fuels can also produce steam locks, which are not associated with floods but have similar symptoms.
A severe form of machinery occurs when excessive liquid fuel enters the combustion chamber. This reduces the volume of the combustion chamber dead and thus puts a heavy load on the starter motor, thus failing to start the engine. Damage (due to excessive compression and even dilution of lubricating oil with fuel) may also occur. This condition is known as a "flood out" machine. Possible causes of too much liquid fuel in the engine include a damaged float carburetor that does not close the fuel-in-needle valve, or the debris caught in the needle valve prevents it from sealing.
The fluid inside the internal combustion engine is very detrimental because it does not fluid. Although not the most common cause, highly flooded engines can produce hydrolocks. A hydrolock occurs when the liquid fills the combustion chamber to the point that it is impossible to change the crankshaft without a machine failure or one of its vital components.
The conventional medicine for a flooded carburetor engine is continuing to hold the full open throttle (full power position) while continuing to crank the engine. This allows maximum airflow through the engine, dousing a fuel mixture that is too rich from the exhaust. If the exhaust system is hot enough to autignit, there may be a fire; this can be seen as fire flowing through the exhaust system. On fuel injected engines, ignoring the throttle (no fuel) when it begins to allow electronic logic systems to produce the correct fuel mixture, often based on exhaust gases. Some fuel injection computers interpret the 'pump' throttle to show the stagnant engine, and change the air fuel mix accordingly. In a carburetor engine equipped with an accelerator pump (which advances fuel flow to match air consumption under fast throttle acceleration), 'pumping' the throttle will force excess fuel into the engine, further flooding it.
In the worst case, excess fuel can cause sparkplugs, sometimes requiring cleaning or replacement before the engine is turned on. This is most likely to happen to a carburetor engine in cold weather, once the running engine has been shut down for a while before restarting. Doing so may cause the choke to configure the mixture to start a cold engine, even though the actual temperature is higher, resulting in too much mix and flooding machine.
Video Flooded engine
See also
- Steam Key
Maps Flooded engine
References
Source of the article : Wikipedia
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