Welcome to Emissions Guide
Section 71 Environment Protection Act Air Emissions Article
. For a permanent link to this article, or to bookmark it for further reading, click here.
How An Evaporative Emissions Control System Works
from:The evaporative emissions control system is part of the emissions control system that works to prevent harmful hydrocarbons and hazardous gases to be released from the operation of your vehicle. The evaporative emissions control system is not just in use when your vehicle is running, it also works when your vehicle is turned off.
Gas is a very easily evaporated substance and tends to turn from a liquid into a vapor at lower temperatures that many other substances. Until vehicles were equipped with the evaporative emissions control system component, there was a significant amount of liquid gas in the fuel tank that simply turned into vapor and was vented or released into the air. It was estimated that before 1970 when evaporative emissions control system programs were put in place, about twenty percent of all hydrocarbons released into the air were from gasoline evaporation from vehicle gas tanks.
The evaporative emissions control system turns what used to be an open system into a closed system, trapping the vapor in a canister. Both the gas tank as well as the carburetor vent into the canister that is filled with charcoal. When the vapor from the gasoline moves through the canister it sticks to the charcoal, which is a type of filter. The tiny vapor particles are held into the charcoal but when the vehicle is started again the suction produced by the engine will pull the vapors back into the engine. This vapor is then burned in the engine as part of the combustion of the motor, resulting in a cleaner burning engine.
In order for the evaporative emissions control system to work correctly, the system must be completely sealed. This includes a sealing gas cap to the outside of the vehicle. If the seal is damaged in some way, the system does not work properly and will trigger the "check engine" light to come on. Once this happens, taking the vehicle to a technician who can then check the on-board diagnostic system will confirm that there is a gas cap seal problem. Simply replacing the gas cap typically fixes the problem and ensures that the evaporative emissions control system is working correctly. Another common problem is a sticky valve to the canister, which will result in an improper air fuel ratio and poor vehicle performance. The valve can also stick open, result in incorrect fuel mixtures as well. Finally the filter to the charcoal canister can also become plugged. This is typically seen as a decrease in power and acceleration when the vehicle is being driven. Even if the engine light does not come on, this filter and the valve should be checked during all tune-ups.
Section 71 Environment Protection Act Air Emissions Specific links
Section 71 Environment Protection Act Air Emissions News
Proposed sand mine draws all parties to open house (video) - LaSalle News Tribune
Proposed sand mine draws all parties to open house (video) LaSalle News Tribune The three-hour open house at Illinois Valley Community College allowed visitors to meet with officials with the Illinois Environmental Protection Agency, Department of Natural Resources, Historic Preservation Agency and owners and consultants with ... |
Spring Magic Today (holiday weekend T-storms, 90 by Sunday?) - Minneapolis Star Tribune (blog)
Spring Magic Today (holiday weekend T-storms, 90 by Sunday?) Minneapolis Star Tribune (blog) Here's an excerpt of a story at Bloomberg BNA: "The Environmental Protection Agency will hold two public hearings May 24 in Washington, DC, and Chicago on Clean Air Act new source performance standards that would limit carbon dioxide emissions from new ... |
Oil Regulation 2012 - United States: Getting The Deal Through - JD Supra (press release)
Oil Regulation 2012 - United States: Getting The Deal Through JD Supra (press release) Under the Clean Air Act Section 211(o), as amended by the Energy Independence and Security Act of 2007 (EISA), the Environmental Protection Agency (EPA) is required to annually establish specific annual volume standards for cellulosic biofuel, ... |
BUSINESS IN BRIEF 24/5 - VietNamNet Bridge
BUSINESS IN BRIEF 24/5 VietNamNet Bridge In addition, as businesses face more difficulties, signs of deflation and low growth rates, together with other social and environmental problems are the real obstacles for the achievement of the overall objectives and targets of the 2012national ... |
East Africa: 'Probama' Sentiment Four Years Later - AllAfrica.com
East Africa: 'Probama' Sentiment Four Years Later AllAfrica.com The pro-Obama sentiment is echoed in other parts of the East African community as well: a 2011 Gallup Poll found that 83% of Kenyan respondents approved of American leadership, as did 79% of Ugandan respondents, 75% of Tanzanian respondents and 71% of ... |