Thanks to the EGR system, the NOx emission in diesel engines can be reduced by up to 50% . However, in this method, combustion is worsened, engine performance decreases, and other pollutants, especially particulate emissions (PM) slightly increases.
How much NOx does a diesel produce?
On average a new diesel car emits over 800mg/km of nitrogen oxides driving in town compared to the limit of 80mg/km.
How do you reduce NOx in a diesel engine?
NOx emission can be reduced by primary methods such as retard injection, fuel nozzle modification, change of compression ratio, water direct injection, water emulsification, exhaust gas recirculation (EGR) and secondary method such as selective catalytic reduction (SCR).
How can I lower my NOx emissions?
Process modifications include using specially designed low-NOx burners, reburning, combustion staging, gas recirculation, reduced air preheat and firing rates, water or steam injection, and low excess air (LEA) firing. These modifications are capable of reducing NOx emissions by 50 to 80%.
How do you calculate NOx emissions?
The NOx charge will be calculated by applying a per-milligramme per-kilomtere matrix to the officially recorded manufacturer emissions levels of NOx per kilometre. The charges will be incremental and will work on a sliding scale calculating the cars NOx emissions in milligrams per kilometre (mg/km).
Which is worse CO2 or NOx?
While diesel engines emit LESS CO2 than their petrol equivalent, they emit MORE NOx. … The very things that make diesel engines produce less CO2; high combustion temperatures and lean burning, in turn produce higher levels of NOx. More diesel engines brought down CO2 emissions significantly, but increased NOx levels.
Why do diesels produce more NOx?
Why do diesel engines produce more NOx than petrol engines? … Diesel engines operate at a higher temperature and pressure than petrol engines. These conditions favour the production of NOx gases. The quantity depends on the volume and duration of the hottest part of the flame.
How can I reduce my diesel emissions?
An excellent way to reduce diesel emissions is to install a selective catalytic reduction (SCR) onto your car. The job of the SCR is to convert gases from NoX to either nitrogen or water vapour. This advanced emissions control technology system adds ammonia to the exhaust gases.
Can you run nitrous on a diesel?
Nitrous oxide injection, used as intended, is relatively safe for use in diesel engines. Diesel engines tend to be significantly more robust than a standard gasoline engine and therefore can withstand higher cylinder pressures without the tendency to experience a catastrophic failure.
What does burning diesel release?
Diesel fuel is a mixture of hydrocarbons which—during an ideal combustion process—would produce only carbon dioxide (CO2) and water vapor (H2O). Indeed, diesel exhaust gases are primarily composed of CO2, H2O and the unused portion of engine charge air.
What is NOx fail?
engines failing NOx caused by lean condition. General Motors Multiport Fuel Injection engines may fail emissions standard testing due to excess Oxides of Nitrogen levels in the exhaust gas. Here are some steps to determine and correct the cause of high NOx emissions.
Why is NOx so bad?
Nitric oxide (NOx)
NOx can cause serious health damage to humans, including respiratory diseases. NOx is also responsible for smog and the typical brown cloud that covers larger cities and produces poor air quality. … NOx reacts with volatile organic compounds in the presence of sunlight and forms ground-level ozone.
Does a catalytic converter reduce NOx?
Catalytic converters in diesel engines do not work as well in reducing NOx. One reason is that diesel engines run cooler than standard engines, and the converters work better as they heat up.