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Cylinders And Pistons
The third stroke begins with a spark. A spark plug on top of the cylinder ignites the compressed air-fuel mixture, causing a rapid expansion of gases. This pushes the piston downward, which “cranks” the crankshaft.
The size of an engine is reflected in the number of cylinders it has. For example, an economy car, such as the Honda Civic, will usually have 4 cylinders; a family car, like the Toyota Camry, may have 6 cylinders; and an SUV, such as the Chevrolet Tahoe, might offer 8 cylinders.
As an example of the crankshaft’s operation, consider the pedals of a bicycle. As you move your legs up and down, their force causes the crank to rotate. In turn, the rotating crank causes the wheels to rotate. This propels the bike forward. So too does the force of the pistons cause the crankshaft to rotate, which ultimately causes the wheels of your car to turn.
The second stroke is aimed at compression. The piston begins to move upward, compressing the air and fuel within the combustion chamber. This stroke ends when the piston has reached the top of cylinder.
Your Engine’s Combustion Cycle
Your car’s engine is a complex assembly that requires ongoing maintenance. While [url=http://www.1855sacramento.com/woolrich.php]woolrich outlet[/url] most [url=http://www.mxitcms.com/tiffany/]tiffany[/url] repairs should be performed by a trained mechanic, being familiar with its operation is valuable.
The fourth and last stroke is focused on moving the exhaust gases out of the combustion chamber. The valvetrain opens the exhaust valve while the piston moves upward. This forces the gases from the chamber. When the piston reaches the top, the exhaust valves closes, and a new cycle begins.
Now that we’ve covered how the engine’s main components work, and the tasks each performs, it’s easy to understand the assembly’s 4-stroke combustion cycle. The first stroke begins with the piston moving toward the bottom of the cylinder. The valvetrain, controlled by the camshaft, opens the intake [url=http://www.mxitcms.com/abercrombie/]abercrombie[/url] valve to allow fuel to enter the combustion chamber. The valve closes when the [url=http://www.gotprintsigns.com/abercrombiepascher/‎]abercrombie soldes[/url] piston reaches the bottom of the cylinder.
The valvetrain encompasses all of the components that influence the opening and closing of the intake and exhaust valves. It essentially controls the [url=http://www.thehygienerevolution.com/barbour.php]barbour paris[/url] timing of air and fuel as they move into and out of the cylinders (though technically, the valvetrain is [url=http://www.gotprintsigns.com/abercrombiepascher/‎]abercrombie pas cher[/url] controlled by the camshaft). [url=http://www.mquin.com/giuseppezanotti.php‎]giuseppe zanotti soldes[/url] Rocker arms, lifters, pushrods, and other parts work together to open and close the valves at precise moments to facilitate the combustion cycle (described below).
Crankshaft
Overview Of The Parts That Comprise Your Vehicle’s Engine
When [url=http://www.ilyav.com/isabelmarant.php]isabel marant pas cher[/url] intermittent engine problems surface, few [url=http://www.rtnagel.com/airjordan.php]nike air jordan pas cher[/url] people know how to troubleshoot them. One of the reasons is because few understand how a car engine works. There are several components that must work seamlessly together in order to generate and transmit the energy needed to propel your vehicle. If one of them malfunctions, the assembly will fail to perform effectively. In some cases, your car will leave you stranded at the side of the road.
Valvetrain
As the piston moves up and down, a thin coat of oil covers its surface, providing lubrication. If oil manages to get past the rings, and enter the combustion chamber, your engine’s performance will suffer. In some cases, the assembly may sustain damage, and need to be overhauled.
Each cylinder contains a piston, which moves up and down inside the chamber. As the piston moves upward, it compresses an air-fuel mixture within a small space called the combustion chamber. The bottom [url=http://www.achbanker.com/homes.php]hollister france[/url] of the piston is attached by a connecting rod to the crankshaft (we’ll describe this component in a moment). The crankshaft’s housing is called the crankcase, which is filled with oil. Oil is prevented from entering the combustion chamber by a series of rings on the piston.
The crankshaft is a component to which each piston is connected. As the pistons move up and down in their respective cylinders, their connecting rods “crank” the crankshaft, causing it to rotate. As it rotates, it produces the power needed to move your vehicle.
In this article, we’ll introduce the main parts of your engine, and explain how each contributes to the assembly’s operation. We’ll also describe [url=http://www.mnfruit.com/doudounemoncler.php]moncler pas cher[/url] them in the context of your engine’s 4-stroke combustion cycle.
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