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Tiredness, eye irritation and breathing discomfort are just some of the effects of accentuated pollution, Mainly we great urban centers. A NGK, world's largest manufacturer and specialist in spark plugs, warns that the oxygen sensor, also known as a Lambda probe marketed with the NTK brand also in the replacement market, is responsible for analyzing the condition of burning and fuel economy of the vehicle, and plays a fundamental role in controlling pollutant emission.
The sensor analyzes oxygen levels in engine escape gases and informs the quality of the air/fuel mixture to the vehicle control unit (ECU). After comparing this concentration with ambient air, The module makes the ideal adjustment of the amount of fuel injected into the combustion chamber, promoting the best performance ratio, consumption and emissions.
NGK recommends an annual oxygen sensor assessment, or every 30.000 km, by a trained professional. In regions where environmental vehicle inspection is mandatory, As in São Paulo (SP), the orientation should be followed in unpretentibly, to avoid surprises during the survey.
“The consumer should also be aware of poor fuels, that can influence the proper functioning of the part, as well as other vehicle components ”, afirma Hiromori Mori, NGK Technical Assistance technician.
second probe
Em 2011, The installation of a second probe became mandatory in light vehicles powered by gasoline, ethanol or CNG (Vehicular natural gas). The rule was determined by Resolution 354/2004, CONAMA (National Environment Council).
Installed in the vehicle exhaust system, This sensor evaluates the gases that have already gone through the action of the catalyst. The second probe is part of the OBD-BR2 system, On-Board Diagnostics (from English, on-board diagnosis system), that does not act directly on the information about the mixture, but checks if the first and catalyst are achieving the expected results in the control of vehicle emissions. When the second probe malfunctions, due to contamination or need to exchange, The warning light is light on the vehicle panel, indicating that there are problems in the emission control system.
Each vehicle has a suitable oxygen sensor model, According to the NGK NTK application table. For more information or questions, The company offers consumer service by calling 0800 197 112 (free call) e no site www.ngkntk.com.br.
vehicle inspection
NGK reinforces that spark plugs and ignition cables are responsible for the total burning of fuels and oxygen sensors, by analyzing the burning of the car's fuel, determining factors for approval in environmental vehicle inspection, created to control polluting gas emissions. In the municipality of São Paulo, for example, Vigorary since 2009.
The Faculty of Medicine, University of São Paulo (USP) recently presented a study showing a reduction of 47,6% in carbon monoxide emission (CO) and 39% in hydrocarbons (HC), of light vehicles powered by gasoline, inspected in 2012. Flex vehicles had reductions of 55,7% co and 33,3% HC. Between the motorcycles, Emissions' falls were 35% CO and 39% HC.
Another interesting fact of the study is the positive impact of emission reduction achieved in the last three years. Vehicle inspection avoided 1,395 deaths and 1,813 hospitalizations, caused by air pollution, generating savings of R $ 320 million to the city.