Automotive Mechanics: How A Car Works

2635 words - 11 pages

Learning how a vehicle works can be very helpful to learn to get to see how everything comes together and makes a vehicle run properly. There are a few main components that allow a vehicle to run properly such as the engine, cooling system, drive train, brakes, electrical system and the exhaust. It’s very important that all of these components work properly for the vehicle to run efficiently. Without one of these components the vehicle may not run at all or it will run but will not be able to stop or may be polluting the earth more than usual. That’s why it is so interesting to know how all the components of an efficient running vehicle come together for that smooth peaceful ride.
A vehicle must have an engine of some kind in order to convert gasoline, diesel, or some other kind of fuel source in to motion, which will propel the vehicle forward. Gasoline engines now use internal combustion, which burns the fuel inside the engine. Currently gasoline powered cars or trucks use a four-stroke combustion cycle to convert gasoline into motion. The four strokes of the cycle are the intake stroke, compression stroke, combustion stroke, and the exhaust stroke. This cycle is completed in the cylinders of the engine, which consist of pistons that are connected to the crankshaft by connecting rods. During the intake stroke the piston starts at the top, the intake valve will open letting in the proper amount of air and gasoline. It only takes a tiny drop of gasoline to make the process work. Next the piston moves back up to compress the mixture of fuel and air; this is called the compression stroke. After the compression stroke comes the combustion stroke. On this stroke, when the piston reaches the top the spark plug will ignite the air/fuel mixture creating an explosion which drives the piston back down. When the piston hits the bottom of this stroke, which is the exhaust stroke, the exhaust valve will open allowing the exhaust to go out through the tail pipe. After the four strokes are completed this process repeats propelling the vehicle. Basically the cylinders are the heart of the engine with pistons inside which allow the combustion cycle to be completed. Different vehicles can have different amounts of cylinder. Vehicles can have either a four, six, or eight cylinder engine, which can be arranged in three different ways. Engines can have their cylinders arranged in an inline, v, or flat position. At the top of these cylinders are spark plugs, which supply the spark for the combustion of the air/fuel mix. This spark must occur at the right time for the combustion cycle to work properly. There is an intake and an exhaust valve at the top of the cylinder also that let air and fuel in and exhaust out at the proper time. These valves are closed during combustion so the chamber is sealed. Inside or the cylinder a piston fits insider that moves up and down to complete the combustion cycle. Between the piston and the cylinder wall...

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