![]() Engines are often known by the number of cylinders they have. The cylinder is what the piston moves up and down in. This all takes place in the combustion chamber, a small space between the top of the piston and the cylinder. When an electrical charge is passed through them, they generate a spark that ignites a mixture of fuel and air. In most engines they’re caused by spark plugs (one per piston, but occasionally two). ![]() All sorts of things are connected to the crankshaft, including the gearbox and transmission. The up and down motion of the pistons and rods is converted into a rotary motion by the spinning crankshaft. These rods are attached to a much larger and extremely strong piece of metal at the bottom of the engine that lies at right angles to them. How does a car engine make power?Ī sequence of highly controlled explosions pushes down pistons (they look like upturned mugs) that are attached to metal rods, called connecting rods. They are there in the sense that they help give the car’s engine life, but they are not directly involved in the business of making power. That being so, when we consider how a car engine works we can ignore many of the extra parts (the water pump, the alternator, the starter motor and so on) that many people would also consider to be a part of the engine. ![]() The dictionary defines an engine as a machine with moving parts that converts power into motion. ![]()
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