Ads
related to: catalytic converter emissions fix
Search results
Results from the WOW.Com Content Network
A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually used with internal combustion engines fueled by gasoline or diesel, including lean-burn engines, and ...
Commercial selective catalytic reduction systems are typically found on large utility boilers, industrial boilers, and municipal solid waste boilers and have been shown to reduce NO x by 70-95%. [1] More recent applications include diesel engines, such as those found on large ships, diesel locomotives, gas turbines, and automobiles.
As emission control strategies grew more sophisticated and effective, the amount of unburned and partially burned fuel in the exhaust stream shrank, and particularly when the catalytic converter was introduced, the function of secondary air injection shifted. Rather than being a primary emission control device, the secondary air injection ...
On 25 November 2015, Volkswagen said the fix involved a minor hardware modification to the car's air intake system, alongside a software update. [166] This low-cost solution contradicted earlier speculation regarding the possible fitting of new injection nozzles and catalytic converters. [165]
The emissions system works in a series of steps: A diesel oxidation catalyst reduces the amounts of carbon monoxide (CO) and hydrocarbons (HC) released from the exhaust. A DeNO x catalytic converter begins a preliminary removal of oxides of nitrogen. A particulate filter traps and stores soot particles, burning them off when the filter gets full.
The main drawback of lean-burning is that a complex catalytic converter system is required to reduce NOx emissions. Lean-burn engines do not work well with modern 3-way catalytic converter —which require a pollutant balance at the exhaust port so they can carry out oxidation and reduction reactions—so most modern engines tend to cruise and ...
Ads
related to: catalytic converter emissions fix