Camshafts and Crankshafts
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Cams and Crank
Every engine needs a cam and a crankshaft. Cams and cranks generally driv ethe engine and allow the engine to rotate and gain rpm.
Camshafts/Crankshafts
Camshafts are used in piston engines to push down the poppet valves. The cams on the camshaft are lobes which push down the rods or poppet valves. The cams force open the valves as they rotate on the rod. The valves control the flow of fuel intake and exhaust. There are some engines where the camshaft drove the distributor, oil pumps, and fuel pumps. Also in the earlier fuel injection systems the cams would control the fuel injectors. In a two stroke engine the valves are opened up once per rotation of the crankshaft. In a two stroke engine the camshaft and crankshaft rotate at the same time. Four stroke engines the valves only open half as often therefore two full rotations are used.
The crankshaft or crank for short is a rod type revolver which revolves to push down the pistons into the cylinders. The flywheel is connected to the crankshaft and revolves the crankshaft. Sometimes a torque dampener is at the end to smoothen out the rotation and keep the linear push of the pistons.
-Crankshaft and camshaft relationship
The valves or poppet valves control the flow of fuel intake and exhaust they must open and close at the right time of when the piston decides to take in and compress. Since the pistons and the poppet valves are in relation the crankshaft and camshaft is connected to each other. The camshaft and crankshaft is either connected with a timing belt, timing chain, directly, or through a gear system. The camshaft makes one revolution for every two revolutions of the crankshaft.
