BS6 Emission Standards in India 2020| Diesel Engine Technology Explained

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Source: www.theguardian.com

The new BS6 is an Indian government regulation that sets emission standards for vehicles. The government enforces BS6 norms from April 2020 will make the vehicle’s pollution-free that means to enhance environment-friendly vehicles.

The main thrust of the new BS6 regulation is to set lower limits to vehicle emissions in internal combustion engines produces pollutants in the form of carbon monoxide (CO), hydrocarbons (HC), particulate matter (PM) and nitrogen oxides (NOx) these poisons gasses are harmful to health and environment.

The main effect of these pollutants are breathing in raised levels of CO, NOx, HC can reduce immunity and to lung infections. This can cause problems such as wheezing, headache, dizziness, vomiting, and nausea, coughing, colds, flu, bronchitis and heart diseases

In order to reduce pollutants, technology for emission standards in diesel vehicles are a diesel oxidization catalyst to reduce poisons gas like carbon monoxide and hydrocarbons, selective catalytic reducer and diesel exhaust fluid for, nitrogen oxides, and a particulate filter for soot. These all elements are added to the exhaust system and also fuel-grade BS6 fuel ultra-low sulfur diesel in diesel vehicles which means altogether reduces pollutants from IC engines.

New BS6 Diesel Engine Technology Explained

  • Diesel Oxidization Catalyst (DOC)
  • Diesel Particulate Filter (DPF)
  • Selective Catalytic Reducer and Diesel Exhaust Fluid (DEF & SCR)
  • Diesel Oxidization Catalyst

    Source:www.nettinc.com .com
    Diesel Oxidization Catalyst

    The diesel oxidation catalyst is designed to oxidize

  • Carbon monoxide to Carbon dioxide
  • Hydrocarbons to CO2 and H2O
  • Soluble Organic Fraction to CO2 and H2O
  • Soluble organic fraction, SOF, is defined as the fraction of particle mass soluble in organic solvents like Toluene or Dichloromethane.

    Diesel Particulate filter

    Source: www.rac.co.uk

    A diesel particulate filter(DPF) is a filter that captures and stores exhaust soot (some refer to them as soot traps) in order to reduce emissions from diesel cars.

    Diesel particulate filters normally remove 85% and under certain conditions can secure soot removal efficiencies approaching 100%. Some filters are single-use, designed for disposal and replacement once full of accumulated ash filter.

    DPF

    Others are designed to burn off the accumulated particulate either passively over the use of a catalyst or by active means such as a fuel burner which heats the filter to soot combustion temperatures, together with an extra fuel injector that injects fuel to react with a catalyst element to burn soot in the diesel particulate filter.

    Selective Catalytic Reducer

    Source:www.dieselforum.org

    Selective Catalytic Reduction (SCR) is an advanced emissions control technology that injects Diesel Exhaust Fluid (DEF) through a catalyst into the exhaust stream of a diesel engine. The fluid source is usually automotive-grade urea. The DEF sets out a chemical reaction that converts nitrogen oxides into nitrogen, water and tiny amounts of carbon dioxide (CO2), natural components of the air into the atmosphere through the vehicle tailpipe.

    SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere. It is called “selective” because it reduces levels of NOx using ammonia as a diffuse within a catalyst system. The chemical reaction is known as “reduction” where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream. SCR technology alone can achieve NOx reductions by up to 90 percent.

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