RPM Variable Solenoid Engine

The solenoid engine project works on electromagnetic principles of a solenoid. A solenoid is copper coil. The wire is tightly folded multiples to form a solenoid coil. When electrical charge is supplied to the solenoid, it creates a magnetic flux as the current passes through it. The solenoid engine is V4 engine. There are four solenoids as cylinders and there is one piston in each solenoid. The metal pistons inside the solenoids react to the magnetic field created by the solenoids when current is flowing through. When the electrical current is no more flowing through the solenoid, the pistons fall back down to their original position due to gravity. As a result, the piston moves in a linear motion. The pistons are connected to the crankshaft. When the pistons move in a specific sequence, the crankshaft rotates. The linear motion has been converted to rotary motion using this mechanism. The RPM of the engine was controlled by adding a potentiometer to control the resistance of voltage provided to the solenoids. Therefore, controlling how fast the engine operates.