The following camshaft wholesale, camshaft manufacturers and camshaft brand companies will introduce the relationship between crankshafts and camshafts.
(1) The upper camshaft is placed on the cylinder head, which is commonly used in passenger car engines. Main advantages: less moving parts, short transmission chain from camshaft to valve, high rigidity of the whole mechanism, suitable for high-speed engines. The main disadvantage is that the transmission distance between the camshaft and the crankshaft is long, and the toothed belt drive or chain drive is generally used.
(2) The central camshaft is located on the upper part of the cylinder block. Compared with the lower camshaft type: the push rod is reduced (or the push rod is shorter), thereby reducing the reciprocating mass of the valve train, increasing the rigidity of the mechanism, and more suitable for high-speed engines.
(3) The lower camshaft is located in the crankcase. Main advantage: The camshaft is closer to the crankshaft and is generally driven by a pair of gears. Main disadvantages: many moving parts, long transmission chain from camshaft to valve, poor rigidity of the whole mechanism, mostly used in low-speed engines.
