Explain Nexus on Instagram: "A car engine converts fuel into motion through controlled explosions inside its cylinders. First, air and fuel are mixed and drawn into the engine. The piston then compresses this mixture, making it more powerful. A spark plug ignites it, causing a small explosion that pushes the piston downward. This movement turns the crankshaft, which ultimately rotates the wheels. Finally, the engine expels exhaust gases, and the cycle repeats many times per second to keep the ca