Project scope Palais des Nations, Geneva, Switzerland TASK 1 - - PowerPoint PPT Presentation

6 April 2006 1

Project scope

TASK 1 – Assessment of WNTE concept in current GTR

• Existing driving patterns data for representative categories of

vehicle type and application (from WHDC database)

• Simulation of PM and NOx emissions per category using

current PHEM model (Euro 3 engine map)

• Graphical presentation of emissions in/outside the NTE

control zone

OCE Informal Document No. 49 Fourteenth Plenary Meeting of the Working Group On Off-Cycle Emissions 6 June 2006 Palais des Nations, Geneva, Switzerland

6 April 2006 2

Project scope

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Time [s] Positive Engine Work [kWh] Cumulated emissions (with 30 seconds rule) [g] Cumulated emissions (without 30 seconds rule) [g]

within WNTE zone

• utside WNTE zone

Output of Task 1:

• Timeshare in/outside the NTE control zone
• Positive work in/outside the NTE control zone
• Emissions in/outside the NTE control zone
• Effect of interval length on these shares of time/work/emissions

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Project scope

TASK 2 – Assessment of NTE concept for future HD engines Based on:

• Limited amount of existing data for Euro 4/5 engines (quantitative)
• Expert views on Euro 5/6 engines behaviour/calibration (qualitative)

Resulting in:

• Identifying possible limitations in NTE zone proposal

TASK 3 – Review of the effectiveness of WHDC and WNTE concepts as a whole

• Coverage of ‘higher risk’ areas
• Elimination of defeat devices and/or irrational control strategies
• Identifying possible limitations

6 April 2006 4

Project scope

TASK 4 – Consider rationale for improving NTE definitions:

• Changing engine speed limit of NTE zone
• Review of carve outs (e.g. 30% power, PM carve out)
• 30 seconds interval
• Review of compliance factor (1.25, 1.5 or other)

TASK 5 – Assessment of ambient temperature and pressure boundaries

• Analysis of existing on-road measurements
• Expert view for future engine technology

TASK 6 – Review of alternative NTE concepts Including (but not limited to):

• Work-based window
• Compliance factor (based on BSFC instead of torque)

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Examples

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Results for NOx and PM (truck/trailer in rural driving)

Engine speed (norm.) Engine torque (norm.)

Relative NOx contribution

• 0.2
• 0.1

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4

00

NTE zone

Vehicle: Truck with trailer Engine: Euro 3 (average) Driving cycle: Rural Shifting: Economic/fast

Engine speed (norm.) Engine torque (norm.)

Relative PM contribution

• 0.2
• 0.1

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.

00

NTE zone

Vehicle: Truck with trailer Engine: Euro 3 (average) Driving cycle: Rural Shifting: Economic/fast

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Results for NOx and PM (city bus in urban driving)

Engine speed (norm.) Engine torque (norm.)

Relative NOx contribution

• 0.2
• 0.1

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4

00

NTE zone

Vehicle: City bus Engine: Euro 3 (average) Driving cycle: City Shifting: Economic/fast

Engine speed (norm.) Engine torque (norm.)

Relative PM contribution

• 0.2
• 0.1

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.

00

NTE zone

Vehicle: City Bus Engine: Euro 3 (average) Driving cycle: City Shifting: Economic/fast