What is the name of the tool used to remove the valve of automobile engine?

This is called valve spring disassembly frame.

The valve spring dismounting rack is a special tool for dismounting the overhead valve spring. When in use, the disassembly bracket is pressed on the valve, the pressure ring is aligned with the valve spring retainer ring, and then the handle is pressed, so that the valve spring is compressed. At this point, you can remove the lock pin or lock piece of the valve spring, slowly loosen the handle, and take out the valve spring retainer and puller.

Puller is a special tool to remove the gear or bearing installed on the shaft with interference fit. The commonly used puller is manual, and a pressure screw and a claw are installed on the rod-shaped bow fork. When in use, a gasket is placed between the shaft end and the compression screw, the gear or bearing is pulled by the claw of the puller, and then the compression screw is tightened, so that the gear and other interference-fit installation parts can be pulled down from the shaft.