Emissions reduction in diesel engines


Emissions reduction without compromising performance

“The real challenge, however, for us has been designing cleaner diesel engines to reduce NOx and PM emissions while maintaining performance.”

Historically, modifications in engine design to reduce NOx have tended to increase particulates, fuel consumption and reduce performance.

Cummins has developed a system for controlling combustion through new bowl geometry and improved fuel injection. Power ratings are maintained and improved, without increases in engine displacement or fuel consumption, which also decreases mechanical stress and thus reduces maintenance requirements and costs.

Fuel injection improvements equate to greater efficiency and less fuel being consumed when the engine is idling, starting up from cold or performing load changes. Cummins’ new technology uses high-pressure common rail fuel systems and provides fast response consistently.

The introduction of microprocessor-based (computerised) control has enabled generator set manufacturers to greatly improve fuel efficiency and power output while decreasing emissions. This is what maintains optimum combustion efficiencies; fuel quantity is more tightly controlled, as is injection timing and turbo-charger boost pressure.


Alain Charles Publishing, University House, 11-13 Lower Grosvenor Place, London, SW1W 0EX, UK
T: +44 20 7834 7676, F: +44 20 7973 0076, W: www.alaincharles.com

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