What makes car moves

The drive shaft runs the length of the vehicle into a transfer case. The rotation moves the gears within the transfer case, which is a part of the rear axle. The turning drive shaft sends power to the rear axle and wheels, activating them and making them move the car forward. The system of engine, crankshaft, transmission, drive shaft, transfer case, and axle all work together to turn the wheels. The wheels and tires attach to the vehicle with lug nuts and bolts and stop with disc brakes.

In the case of four-wheel-drive trucks, there will be two transfer cases at the front and rear axle. The transmission will engage each transfer case independently of each other. Almost all of today's internal-combustion engines to keep it simple, we'll focus on gasoline powerplants here are of the four-stroke variety. Beyond the combustion stroke, which pushes the piston down from the top of the cylinder, there are three other strokes: intake, compression, and exhaust. Engines need air namely oxygen to burn fuel.

During the intake stroke, valves open to allow the piston to act like a syringe as it moves downward, drawing in ambient air through the engine's intake system. When the piston reaches the bottom of its stroke, the intake valves close, effectively sealing the cylinder for the compression stroke, which is in the opposite direction as the intake stroke.

The upward movement of the piston compresses the intake charge. In today's most modern engines, gasoline is injected directly into the cylinders near the top of the compression stroke. Other engines premix the air and fuel during the intake stroke. In either case, just before the piston reaches the top of its travel, known as top dead center, spark plugs ignite the air and fuel mixture. The resulting expansion of hot, burning gases pushes the piston in the opposite direction down during the combustion stroke.

This is the stroke that gets the wheels on your car rolling, just like when you push down on the pedals of a bike. When the combustion stroke reaches bottom dead center, exhaust valves open to allow the combustion gases to get pumped out of the engine like a syringe expelling air as the piston comes up again. When the exhaust is expelled—it continues through the car's exhaust system before exiting the back of the vehicle—the exhaust valves close at top dead center, and the whole process starts over again.

A car moves by converting the potential chemical energy of gasoline into kinetic energy at the wheels. This is done by a process of burning gasoline, which produces expansion of gas and exhaust of waste gases. When gasoline is injected into the cylinder and mixed with air and ignited, it produces an explosion that rapidly expands the gases in the confined cylinder. Thus the four-stroke process is compression, ignition, power, exhaust. Without them, the car's wheels would rapidly spin on the road without moving the car forward.

The wheels would also damage the asphalt road. Tires are made of a special hardened rubber that fits tightly around the car wheels rubber is liquid without being hardened first. Not all cars are powered by internal combustion engines. In recent years electric cars have been the focus of increased attention as an alternative to gasoline-powered vehicles. They get their energy from electricity, which provides the power to turn the car's wheels.

What Makes the Wheels Move on a Car? Parts of a Motor.