Car Exhaust Systems - Information On How They Work

By Tom Johnson

Without the internal combustion engine, our cars would not operate the way we are used to. And without our car's exhaust system, the combustion engine would not operate properly at all. Once the combustion stroke is complete, the gases that are created must have an escape route or they will become trapped inside the engine and cut off the oxygen supply. It is the responsibility of the exhaust system to take away these emissions from the engine and do so in a quiet and efficient manner. Following is how a car's exhaust system works.

The quiet aspect of an exhaust system is handled by one or more mufflers. A small explosion results from the compression of fuel and air in an internal combustion engine, and though not very large, it still creates a racket. We usually do not comprehend just how loud this fire is until we are next to a car that has a hole in its muffler. It is enough to drown out the very thoughts in our own heads, much less render the radio useless. The muffler cancels this noise out either by way of a restrictive tube passing through insulation materials, or by using noise cancellation technology. Whatever sound frequencies are left over are whisked out of the tail pipe at the rear of the car and as far away from the driving compartment as possible.

Unburned fuel is the source of the emissions that a car's exhaust system removes from the vehicle. Research on these unburned hydrocarbons has shown a possible adverse effect on the atmosphere, and the catalytic converter is employed to help reduce the danger. This device captures the emissions and re-burns them at a designated temperature. The resulting nitrogen and oxygen exit through the tail pipe. Oxygen sensors are found at various junctures of the exhaust system, and they relay how much oxygen is detected to the car's computer. The computer, based on this information, then regulates the amount of fuel deposited into the engine. A continuous and steady air to fuel ratio is maintained in this way.

A vital piece of the proper operation of an engine is back pressure. The exhaust manifold creates this back pressure, and therefore power, by only allowing so much waste gas to escape. The engine does not have to strive as hard as a result, and its performance is increased. The manifold captures the gases via a process called exhaust scavenging, and if an exhaust is installed that is too large, then excess air will escape and performance suffers.

Without the exhaust system, cars would not run properly or at all. If the emissions created from the explosion of fuel and air were not taken away, the engine would run horribly, if it ran at all. They create a quieter ride for the occupants of the car, and with the use of a catalytic converter, they lessen the gases released into the atmosphere. A car's exhaust system is as vital as any other for a car.

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1 Response to "Car Exhaust Systems - Information On How They Work"

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