Are You Ready for Sub-23NM?

The European Union and other countries such as China and India have regulations (e.g. Euro 6/VI, China 6) for measuring solid particles larger than 23nm. Studies have shown that some newer engine technologies, such as Gasoline Direct Ignition (GDI) engines and Compressed Natural Gas engines, emit solid particles in the 10 to 23nm range. The next phase of particle number regulations (post-Euro 6/VI) will lower the particle size threshold from 23nm to 10nm.

Whether you are developing a new engine, tuning an existing engine to optimize emissions, or evaluating the performance of a diesel or gasoline particulate filter, the new Engine Exhaust Particle Measurement System is the ideal tool for the accurate measurement of the size distribution and number concentration of solid particles coming from any type of engine.

	Application	Application Challenges
	Comply with upcoming Sub-23nm PN regulations	Post Euro 6/VI PN regulations will reduce lower particle size to 10nm, so engines will need to be tested for total solid particle number emissions for particles larger than 10nm
	Increased particle emissions during cold start	Real Driving Emission (RDE) Testing will include a cold start event in the test procedure. This will require aftertreatment systems optimization and new engine calibration
	Performance of DPF/GPF devices	DPF/GPF filters have variable performance as a function of loading, and can have high particle emissions during regeneration events
	Brake particle emissions	As engines get cleaner, particle emissions from other sources, such as brakes and tires, will contribute a larger fraction of the total vehicle emissions
	Aircraft turbine emissions	New international regulations (CAEP/11) for particle emissions from aircraft engines include limits for the number of solid particles larger than 10nm
	Non-road machinery emissions	Stage V regulations for non-road machinery (diesel and spark ignition engines) regulate solid particle number emission limits for several engine categories

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