These measurements together provide a very accurate way of measuring the combustion efficiency of an engine. Of the many molecules and compounds coming out of the tailpipe, the EPA is primarily concerned with five of them: Carbon dioxide (CO2) Oxygen (O2) Carbon monoxide (CO) Hydrocarbons (HC) Oxides of nitrogen (NOx) One of the most effective ways to resolve emissions issues is by sampling the exhaust gases: This is carried out to ensure that the exhaust gases emitted by any vehicle are within the permitted levels stipulated by both national and European laws. The exhaust gas analyser is used for measuring 4 gases, oxygen (O2), carbon monoxide (CO), carbon dioxide (CO2) and hydrocarbons (HC) as well as calculating lambda (λ) a measure of air/fuel ratio. Use of Car Exhaust Gas Analyzer. Car Exhaust - Air Pollutants. Air is mostly made of two elements, oxygen (O2) and nitrogen (N2). In order to guarantee smooth and error-free use, the hoses must have certain properties. For the most part, none of these chemical compounds are harmful; however, environmentalists argue that excessive amounts of carbon dioxide promote the formation of the greenhouse effect. The root cause of the problem is an engine which is emitting excessively high NOx emissions. Let’s take a look at a few. Recommendations, Documents and Guides are developed by Technical Committees. However, there is considerable interest in the composition of motor coach exhaust gases on the part of manufacturers and operators. Total safety is ensured by permanent and reliable protection of the valve and the regulator when used in mobile applications. | ' : ''}}{{lede.tags.join(', ')}}, Carbon monoxide (CO) – An odorless, tasteless, poisonous gas, carbon monoxide can cause a variety of health problems and even death. (Vehicle Test is also referred to as MOT (UK), APK (NL), Bilprovning (S)). Smaller type refillable cylinders (5 and 10 liter water capacity) can be equipped with an advanced built-in regulator for easy handling. Unfortunately, engines do not run perfectly, and as a result, they also produce three by-products commonly referred to as the "terrible trio" of automotive pollutants. If gasoline engines burned their fuel as efficiently as possible, they would produce three by-products: water vapor (H2O), carbon dioxide (CO2) and nitrogen (N2). Privacy Policy | Terms of Use Exhaust gas emission testing is a process where test equipment is used to measure the gases produced by a cars engine. Sound waves and pressure waves are the same thing - they are caused by the movement of the gas but they travel through it. Standard range of mixed gases in portable cylinders available from stock, designed in partnership with analytical OEMs. | ' : ''}}{{lede.tags.join(', ')}}, readings that would indicate a properly functioning engine, but a converter that is not lighting off, due to contamination or physical damage, <.5% Balanced with <.5 CO, but normally not zero, <.5% Balanced with <.5 O2, but normally not zero, 14.7 Parts air to 1 part fuel or gasoline, co2 is an indicator of complete combustion, Single cylinder misfire in a 4-cylinder engine reduces reading by 25%, 02 reading should be close to but often slightly lower than CO reading (well within .1% of CO), High readings indicate a lean condition that can result in a false P0420 code, CO reading should be close to but slightly higher than the O2 reading (well within .1% of O2), High readings indicate rich condition and are an indicator of incomplete combustion, High HC reading can result in excessive carbon restricting the converter, If high HC readings exist along with O2 readings, a misfire or cylinder imbalance may be inferred - This may cause the converter to overheat and the shell to glow red and discolor, resulting in substrate meltdown, Lower HC readings are always better for engine and converter efficiency, Slightly lean conditions are the main reason for high NOx readings, Exhaust leak prevents converter from reducing NOx efficiently, NOx is normally tested on a dyno with engine at partial load, Lambda is a more accurate indicator than AFR because it is actual balance of air to fuel, Converter requires Lambda to be between .98 and 1.02 to light off but will not work at peak efficiency unless Lambda is between 0.995-1.005, 14.6-14.8 Is acceptable as long as Lambda is 1, Lambda is a better measurement because it indicates true air to fuel balance, It isn’t a theoretical target like AFR of 14.7:1.
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