2007-01-20 22:55:05 · 5 answers · asked by tocrank 1 in Cars & Transportation ➔ Boats & Boating
A reed valve is used in carburaters on two cycle engines. The are thin metal pieces fitting over an open port the same shape as the reed.Hope this helps.
2007-01-20 23:02:09 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Reed valves are commonly used in two-stroke engines to control the fuel-air mixture that is admitted to the engine crankcase. As the piston rises in the cylinder the resulting vacuum opens the valve and admits the fuel-air mixture. As the piston descends, it raises the crankcase pressure causing the valve to close to retain the mixture and pressurize it for its eventual transfer through to the combustion chamber.
Given the fact that they operate via air pressure alone, reed valves are not as precise as rotary valves since physical inertia causes them to open later than the optimum time. Manufacturers have attempted to address this in part by creating multi-stage reeds with smaller, more responsive reeds within larger ones that provide more volume later in the cycle.
The repeated flexing of the valve material eventually causes metal versions to fatigue and fail to seat properly while fiberglass ones will merely snap off and be digested by the engine.
2007-01-21 00:40:45 · answer #2 · answered by Mysdak 2 · 3⤊ 0⤋
best way to explain reed valves is to cast your memory back to music class and the clarinet, the reed would have to be placed at the mouth peice so the right sound could be made when you blew wind over it, the valve would vibrate as the air passed over it and it disturbed the airflow to change it's sond.
The same applies to reed valves in 2 stroke engines, the piston inducts air from the carnkcase which draws fuel from the carb. the carb is mounted to the cylinder barrel and the barrel is designed with ports which direct fuel to carnkcase and then onto combustion chamber, between where the carb is mounted to the barrel there is a set of reeds which helps atomise and mix the fuel as it passes over the vibrating reeds
2007-01-20 23:08:34 · answer #3 · answered by gsf1200 5 · 0⤊ 1⤋
what will said also used in small air compressors. as suction happens they pull back and allow air in, then when pressure comes they push forward and seal. therefore holding pressure. the higher the pressure the tighter the seal
2007-01-20 23:10:18 · answer #4 · answered by vettle1 3 · 0⤊ 0⤋
Its a little metal or fiberglass flap that help gas asperate
2007-01-20 22:59:24 · answer #5 · answered by ChristiCarlClub 2 · 0⤊ 1⤋