1
What is?
is a cylindrical rod of the camshaft, a plurality of the above cast cam for driving a valve. One end of the camshaft bearing support and the other end is connected to the drive wheels.
2
Function
is a part of a camshaft of the engine valve mechanism, responsible for driving the valve opening and closing time, timed to ensure that the engine cylinder intake fresh combustible mixture in the work, and promptly exhaust gas after combustion is discharged cylinder.
3
Type
is now generally used in automotive engines overhead camshaft, according to the number of overhead camshaft, into single overhead camshaft and double overhead camshaft. Mixing the intake and exhaust valves are arranged on a cam shaft, i.e., single overhead camshaft (SOHC). Intake and exhaust valves in the breakdown of two camshafts, i.e., double overhead camshaft (DOHC).
4
disadvantages
All single overhead camshaft valve by a cam shaft driven by a jack , but in different location in the inlet valve, the operation accuracy can not be maintained, the effect is slightly less. The double overhead camshaft can get better performance, but to be equipped with a multi-cam shaft. DOHC manufacturing process complexity, high cost; simple single overhead camshaft structure, durability, and can be adapted to both the general customer power requirements, can be adapted to the requirements of its economy.