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Reducing CO2 Emissions From Internal Combustion Engines

FUTURE TECHNOLOGY

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  • Environment Technologies
Under the Nissan Green Program 2010, the company is working to raise the efficiency of internal combustion engines to the ultimate level. Nissan is developing technologies to cut engine emissions of CO2 by 30%* from the current level by 2015. (*Note: Goal for the engine itself)

Reducing CO2 emissions from gasoline engines

Nissan is using three approaches in developing a range of technologies to raise engine efficiency:
  • More efficient combustion (higher cycle efficiency)
  • Lower intake and exhaust resistance (less pumping loss)
  • Easier rotation (lower friction)
Further development of VVEL is significant to pumping-loss reduction. Combustion method improvements which lead to HCCI are particularly important in attaining high cycle efficiency.
Reducing CO2 emissions from gasoline engines

Actions to improve cycle efficiency

In raising cycle efficiency, as determining the state of combustion in progress is vital, it is necessary to simulate each combustion stage. Nissan has developed various simulation technologies to this day. For the development of HCCI, the ultimate combustion system, offering both higher fuel efficiency and cleaner exhaust, the company has developed a HCCI combustionsimulation system, which creates a high speed three-dimensional representation of chemical reactions in the HCCI combustion process.
Actions to improve cycle efficiency
 

NISSAN TECHNOLOGY MAGAZINE