subject: How Vehicle Emissions Repairs and Testing Began [print this page] Vehicle emissions control and testing became an issue in the United States from the 1950s until the present time. Many state and local governments have conducted studies concerning air pollution and found that car and auto emissions contributed a significant amount to this environmental problem. The state of California was the first to take auto emissions control to a serious level of importance, creating the California Air Resources Board and the U.S. Environmental Protection Agency back in the late 1960s. Both organizations created and enforced the rules and regulations for auto emissions control.
There had been efforts to control the pollution created by cars and vehicles before emissions testing became a big issue. There was the PCV system, or the positive crankcase ventilation system, designed to draw crankcase fumes in unburned hydrocarbons that are a precursor to smog. It draws the fumes into the engine's intake tract and they will be burned instead of getting released unburned into the air. The positive crankcase ventilation system was installed on new 1961 cars sold in California. New York also made it a law as California did by the following year. The PCV system became a standard part on all vehicles worldwide by 1964.
Then came the first legislated exhaust pipe emission standards brought out by the State of California for the 1966 cars sold in the area. The whole of United States followed suit with the law for model year 1968. Year after year after that, the standards were further improved and tightened, and more and more states are writing vehicle emissions repair and testing into their laws.
The improvement and tightening of the emissions standards led to efficiency issues with the vehicles end engines. In response to this, advancements were also made regarding engine efficiency and vehicle technology. The improvements included changes in the engine design, more precision in engine ignition and fuel metering, and also computerized engine management. The advancements also led to a reduction in the toxicity of exhaust breathed out of the engine, although generally it is still not enough to meet vehicle emissions standards.
The presence of catalytic converters also became significant in vehicle emissions. The catalytic converter is a device placed in the exhaust pipe and it is used to convert hydrocarbons and other toxic gases into less harmful elements. It uses a combination of platinum, palladium, and rhodium in this process.
The latest state that added emission repairs and testing to their standards is Idaho. Not all areas in Idaho follow, however. Only Ada County and Nampa have made the emissions control a requirement for all drivers. Emissions testing has already begun on June 2010 and all cars from 1981 to 2005 are required to be tested for emissions control. Hybrid cars are an exception to this new law in the state of Idaho.
Smog and air pollution has become an increasing problem in Kuna and Canyon County in Idaho, which is why the law has finally been approved and passed in the state. The emissions control standards were not welcome when it was introduced, but it does not seem as if everybody is unhappy about it. Residents of Kuna and Canyon County has been expecting the emissions control requirement, knowing that it was just a matter of time that the law will be passed. There are presently no problems with the vehicle emission repair and emissions testing in Idaho.
