So as not to bore the car fanatics, I will keep the following description brief.
A camshaft is found in a car engine that enables the opening and closing of valves as the engine rotates to enable combustion — bringing in the fuel (intake valve) and expelling what’s left after combustion (exhaust valve).
I have embedded a video below illustrating the purpose of a camshaft.
The important thing to know about a camshaft is that it cannot operate on valves or cylinders independently of the others. The rotation of the engine moves the camshaft through the same motion every time. As a result, a camshaft creates efficiency limitations.
Enter the camless engine!