=The pistons are very much like the pedals on a bicycle. They are attached to a device called a cam shaft that allows the downward thrust of one piston to cause another piston to move back up to be ready to be pushed down again... sort of like pedals on a bicycle. The ignition is timed in a manner that allows the sequential firing of the spark plugs to cause the cam shaft to rotate smoothly.==To see what a cam shaft looks like, imagine placing a series o bicycles side by side and welding the pedals of each bike to the pedals of the bikes next to it. Cut off the outter two pedals of the two bikes on the end and what you'll have will be a cam shaft. A piston is attached to each of the welded pair of pedals and the cut off ends are connected to the front wheels in a front wheel drive. There are other components in a real car but that's a high level picture that should help to answer your question.=Evan Was Here
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The Stirling engine was invented by Reverend Dr. Robert Stirling and patented by him in 1816.It is an engine that gets it's power from the movement of heat energy from a hot place to a cold place. It consists of two cylinders, the first one is called the displacement cylinder and the second one is the power cylinder.The displacement cylinder has two sections, a hot section and a cold section, the piston in the displacement cylinder is a loose fit so that air or gas can pass by when it is moving, the purpose of this piston is to move the air or gas from the hot section to the cold section and back to the hot section hence "displacing it".Second is the power cylinder containing a double acting piston that is connected to a crankshaft fitted with a fly wheel.When the displacing piston moves to the cold part of the cylinder, the largest volume of air or gas is in the hot part of the displacement cylinder, where it will heat up and expand to a higher volume and push the power piston outwards, when the displacement piston moves to the hot side of the cylinder the air or gas moves over to the cold side of the cylinder, where it will cool down and shrink to a smaller volume and form a vacuum that sucks the power piston in the opposite direction.
The cylinder's intake valve opens to let in a pre-mixed dose of atomized fuel and air. The cylinder moves upward, squeezing this mixture from it's original size to about 1/8th of it's original size. At the top of the stroke, a spark plug is timed to fire, the spark of which ignites the fuel/air mixture causing it to burn rapidly (it does not explode, it burns), and produces a huge volume of gasses that forcibly push the piston back down - this energy is transmitted through gears to the wheels of the car.
These are main functions of Cylinder Liners.(1)Formation of sliding surfaceThe cylinder liner, serving as the inner wall of a cylinder, forms a sliding surface for the piston rings while retaining the lubricant within. The most important function of cylinder liners is the excellent characteristic as sliding surface and these four necessary points.(1)High anti-galling properties(2)Less wear on the cylinder liner itself(3)Less wear on the partner piston ring(4)Less consumption of lubricant(2)Heat transferThe cylinder liner receives combustion heat through the piston and piston rings and transmits the heat to the coolant.(3)Compression gas sealingIt is necessary that a cylinder liner which is hard to transform by high pressure and high temperature in the cylinder.A cylinder wall in an engine is under high temperature and high pressure, with the piston and piston rings sliding at high speeds. In particular, since longer service life is required of engines for trucks and buses, cast iron cylinders that have excellent wear-resistant properties are only used for cylinder parts.Also, with the recent trend of lighter engines, materials for engine blocks have been shifting from cast iron to aluminum alloys. However, as the sliding surface for the inner cylinder, the direct sliding motion of aluminum alloys has drawbacks in deformation during operation and wear-resistance. For that reason, cast iron cylinder liners are used in most cases.See the related link for further information.
The gas Engine is a 4 stroke engine, Nother words the piston must make 4 stroke's to run. Here's the 4 strokes. Entake, compression, power and exhaustWhen you turn the engine over with the starter a piston starts moving, As it starts going down the intake valve starts opening witch lets air and fuel come into the cylinder. That's the intake stroke.When the piston is compleatly down the intake and exhaust valves are closed, When the piston starts back up it will compress the air and fuel, this will be the compression stroke. As soon as the piston reaches the top of the cylinder the spark plug fires witch Explodes the air and fuel mixture that's in the cylinder and drives the piston down. This will be the power stroke. When the piston is all the way down and starts up again, The exhaust valve will open and the piston will push the exhaust gases out into the exhaust pipe. This will be the exhaust stroke. Then the piston starts down, intake valve opens and it does all over again.I hope you understand now. This is all happin real fast
As the piston rises it compresses the fuel-air mixture and simultaneously sucks fuel and air into the crankcase. A little bit after top dead center, the spark plug fires the compressed mixture forcing the piston back down. As the piston travels down, it uncovers the exhaust and intake ports. The fuel-air mixture in the crank case is forced into the cylinder and blows most of the exhaust gas out by the time the piston starts upwards again and covers the exhaust port. The piston continues upwards to compress the fuel-air mixture and the next cycle starts. There is a very nice animation at the link, below.