Okay kiddo, have you ever played with a toy car or a remote-controlled car? Imagine that inside the car, there is a little machine that decides when the car should go faster or slower, and when it should turn left or right. That machine is called the engine, and it has an important part called the camshaft that helps it make those decisions.
But sometimes, people want to make the engine even better and more efficient, so they take out the camshaft and use a special computer system instead. This way, the engine can change how much air and fuel it needs to make the car go faster or slower, and it can also decide when to open or close the valves inside the engine.
This is called a camless engine, and it's like having a really smart brain controlling the car instead of just a simple machine. It can make the car go faster, use less fuel, and even reduce pollution. Isn't that cool?