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Study on CRT-based Filter Tech & Particle Emissions from Euro III Engine: Volvo Test 2002

Investigating the impact of CRT-based filter technology on particle emissions from an Euro III engine using Swedish Class 1 fuel D-5. The study will involve two driving cycles (ESC and ETC) and consider Fuel D-4 if budget permits. Volvo tests were conducted in 2002 to analyze steady states and identify problems, such as issues with dilution factors and temperature control due to water cooling. Solutions were implemented to address these uncertainties. The study highlights the importance of stabilizing dilution factors to ensure accurate measurements.

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Study on CRT-based Filter Tech & Particle Emissions from Euro III Engine: Volvo Test 2002

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  1. Volvo test plans • Euro I D-1 EN590 1500 ppm S D-4 EN590 8 ppm SD-5 Swedish Class 1 Stationary (ESC)Transient (ETC) • Euro III D-2 EN590 300 ppm S D-4 EN590 8 ppm SD-5 Swedish Class 1 Stationary (ESC)Transient (ETC) • Study the influence of CRT-based filter technology on particle emissions from an Euro III engine. Swedish Class 1 fuel (D-5) and two driving cycles (ESC and ETC) will be used. Fuel D-4 will also be tested if budget allows once the final sampling and testing protocol has been defined by WP-300.

  2. Volvo test performed during 2002 Euro III D-2 EN590 300 ppm S D-4 EN590 8 ppm SD-5 Swedish Class 1 Stationary (ESC)Transient (ETC)Five steady states

  3. Problems and uncertainty factors. • Problem with primary dilutor – required modification as per Dekati drawing. • Water cooling of the primary diluter caused the temperature control to be difficult. • CPC required a very high dilution factor (11 250). • Pressure-spikes in the beginning of the measurement period due to air dryer. • 2 different ELPI’s were used – results do not correlate. • Dilution factor during SS points not stable – reduced as exh. temperature reduced.

  4. Problem with fixing dilution factor: A

  5. Problem with fixing dilution factor: B • This was not initially noticed or known to be a problem. • In initial tests the primary dilution factor dropped to below 8. • A very long stabilization time was required to prevent this with subsequent testing. • As exhaust temperature drops, density increases causing a greater mass of gas to be drawn into the diluter since it is based on volume flows.

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