EVAPORATIVE EMISSION CONTROL SYSTEM (EVAP SYSTEM) IN CARS

Hello auto owners, it interesting to be with us for another auto-informative Thursday. Its great cos we are winding down to the weekend, and a lot of auto repairs jobs will be going down over the weekend too. So i would love to draw you attention to what i discovered,and what lot of car owners, mechanics, ignore possible because they know or don't understand it.

THE LOCATION OF THE EVAP SYSTEM IS FOUND UNDER THE FUEL TANK

We are going to be talking about the EVAP (evapourative emission control system). Lets get down to the basic to understand the concept of emission control.

                                              

                                              Controlling Emissions

The fuel we put in our cars contains more than 150 chemicals, including benzene, toluene and sometimes even lead. These ingredients can cause dizziness, breathing problems and headaches when they're inhaled. Inhaling large amounts of gasoline fumes can even cause death. On top of all that, evaporated gasoline is one of the leading causes of smog and air pollution.

For these reasons, car makers are required to install systems on their vehicles that HA typical system consists of a small canister full of charcoal, valves, hoses, vents in the fuel lines and a sealed fuel tank cap. When fuel evaporates inside the gas tank, the excess vapors are transferred to the charcoal canister. They're stored there until they can safely be transferred back to the engine to be burned with the normal air-fuel mixture.

When that's ready to happen, a valve creates a vacuum that draws the vapors into the engine. Fresh air is also drawn in through the vents and valves to mix with the vapors for better combustion. These systems can be controlled mechanically, or like on most on newer cars, through the engine's computer. The computer tells the valves when to purge the canister of vapors. This typically happens when the car is in motion, rather than at idle. It's just one example of some of the behind-the-scenes technology that you'll likely never see or feel.

As you may expect, things can go wrong with the EVAP system, too. If the canister fails to purge or does so under the wrong conditions, it can hamper the performance and emissions of your vehicle. When this happens, you may find that the entire system needs to be replaced.

Up next, we'll learn more about gasoline evaporation and discuss what you can do to reduce it in your own vehicle mitigate gasoline evaporation. Environmental regulation in the United States began in earnest in the early 1970s, and as a result, cars have had evaporative emission control (EVAP) systems ever since. These systems are designed to store and dispose of fuel vapors before they can escape into the atmosphere.

 SIGNS OF A FAULTY EVAP SYSTEM

Check Engine Light

A defective canister purge solenoid may also set off a Check Engine Light. If the computer detects any problem with the purge solenoid circuit or signal, it will set off the Check Engine Light to alert the driver that a problem has occurred. A Check Engine Light can also be caused by a wide variety of other problems, so it is recommended to have the vehicle scanned for trouble codes to be sure.

The canister purge solenoid is an emissions component and is therefore an important piece in making sure that the vehicle meets emission requirements. For this reason, if you suspect that your canister purge solenoid may be having a problem, have the vehicle diagnosed by a professional technician, such as one from Your Mechanic, to determine if the canister purge solenoid or vacuum hose needs to be replaced.

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