2013 MOTORCYCLE VALVES ( Valve )

Valves ( Valve )

Well, in this discussion I try to discuss about the valve motorcycle ... let us see what is meant by the valve and what does it do...^_^ Valve actuated by a valve mechanism , which consists of :- Shaft cam- Trunk suppressor- The spring cover- Roll the adjusting boltValve located on the motor only four steps , while two step motors generally do not wear the valve . Valve on motorcycle four step mounted on the cylinder head . Task valve for opening and closing the combustion chamber . Each cylinder is equipped with two types of valves ( suction and exhaust ) Opening and closing of the second This valve is set with a cam shaft is called the shaft ( camshaft ) .So -cylinder four-stroke engine requires two cam , which cam intake valve and exhaust valve cam . Cam shaft rotated by a crankshaft through the transmission gears or chains . Cam shaft rotates with half the speed of rotation of the crankshaft . Thus , the diameter of the gears on cam shaft is twice the diameter of the gear on the crankshaft . because The trajectory of the pen trajectory and a half times the crank shaft cam .The valve is made of a hard material and easily deliver heat . Valve receives high heat and pressure and is always moves up and down , thus requiring high strength. In addition it should be resistant to heat valves and friction . Function to decide the actual valve and connect cylinder space above the piston to the outside air during the needed . Because the combustion process in the cylinder gas engine must takes place in a sealed combustion chamber . If to happen gas leaks even a little , then the combustion process will be interrupted . Therefore, the valves should be tightly closed when burning gas takes place . Intake valve and exhaust valve -shaped fungus ( mushroom ) and called " poppet valve " . Intake valve receives combustion heat , valve thereby experiencing uneven expansion which will result in density may reduce the effectiveness of the holder valve. To improve the efficiency of intake holes are usually made as big as possible. Meanwhile the pressure relief valve also receive heat, pressure higher heat received, it will reduce effectiveness of density as well, so consequently the valve seat easy to wear and tear occurs. To avoid this, the looseness (clearance) between the valve stem and stem head made ​​larger. To distinguish the intake valve exhaust valve can
seen in both diameter, intake valve diameter is generally more greater than the exhaust valves. Of various cross sections illustrated valve lets see Figure 1 valves on the image below, there is shown where mounted valves, and other components that accompany it in installation.

 

Figure 1. valves and other components
accompanying time installed

 As shown in the picture other parts of the valve are valve head. Valve head has a very important role,
because he must still work well, although the temperature fluctuations. Field above the valve head is called a shield. The form there is concave and convex there. Called concave shield shield trumpet and is usually used as an intake valve. while the shield convex is used as a relief valve for more power high. Also mounted on the valve springs. Valve springs assigned to close the valve in accordance with the motion of the lever leverage away from the tip of the valve stem.