Euro VI-d Compliant Diesel Engine's Sub-23 nm Particle Emission

Area of Science:

• Environmental Science
• Automotive Engineering
• Analytical Chemistry

Background:

• Transportation is a major source of hazardous air pollution.
• Stricter emission regulations like EURO VII are driving advancements in exhaust after-treatment technology.
• Current Solid Particle Number (SPN) measurement ranges may not fully capture all relevant particles.

Purpose of the Study:

• To analyze the theoretical and practical differences in measuring particles above 10 nm versus above 23 nm.
• To evaluate the impact of different particle counting principles on emission measurements.
• To assess the implications for upcoming EURO VII emission standards.

Main Methods:

• Comparative analysis of measurement principles for particle counters.
• Engine bench measurements using two distinct particle counting devices.
• Evaluation of soot particle counting across different size thresholds.

Main Results:

• Extending the lower measurement range for tailpipe particle emissions increased reported values by 20%.
• Diesel Particulate Filter (DPF) filtration efficiency remained high, exceeding 99%.
• Differences in particle counter sensor principles affect measurement outcomes.

Conclusions:

• The upcoming EURO VII legislation's SPN requirements could be more stringent due to extended measurement ranges.
• Sensor technology and measurement principles are critical for accurate particle emission assessment.
• Accurate particle measurement is essential for verifying the effectiveness of emission control technologies.