Crankshaft
![Image](https://lh4.googleusercontent.com/-RwMvFaHOn-8/TXy0UvuVSxI/AAAAAAAAAQg/mj1JSD3lfOI/s320/crankshaft-324x205.jpg)
Crankshaft The crankshaft is a rod that is connected to the pistons in an engine. As the pistons move up and down due to combustion, they rotate the crankshaft. This rotational force travels down a car's drivetrain and eventually powers the car.