Highly Efficient EAS for Future Diesel Application

Transcription

1 AVL List GmbH (Headquarters) Highly Efficient EAS for Future Diesel Application 1. International Exhaust Gas and Particulate Emissions Forum Wancura, Hadl, Wieser, Weißbäck, Krapf, Mitterecker

2 Content Project Motivation Aftertreatment Layout Challenge to achieve lowest Emissions Development Results Vehicle Summary and Next steps 2 Februar 218 2

3 Content Project Motivation Aftertreatment Layout Challenge to achieve lowest Emissions Development Results Vehicle Summary and Next steps 2 Februar 218 3

4 NOx Project Motivation 11 low dynamic Valid RDE cycle RDE cycle high dynamic & speed Challenges RDE min Ultra low load cycle NOx target RDE max and 16km/h RTS95 Temperaturemanagement in low load city operations Aggressive driving style Low NEDC RDE moderate Load WLTC High Too high temperature and space velocity for aftertreatement due to Heavy weight, small engine Long time high speed driving e.g. German Highway Smooth Driving Influence Dynamic, Speed Straight Route External Conditions Curvy Route Borderline areas to be focused on 2 Februar 218 4

5 Project Motivation GEN1 GEN1 Optimization for SULEV3 Closed coupled SDPF ECAT as heating measure and LNT support GEN2 Base is GEN1 GEN2 EAS and engine adapted to RDE boundaries Additional 2nd Urea dosing for high load operation 2 Februar 218 5

6 Content Project Motivation Aftertreatment Layout Challenge to achieve lowest Emissions Development Results Vehicle Summary and Next steps 2 Februar 218 6

7 E-CAT E-CAT Aftertreatment Layout Aftertreatment layout SULEV3 GEN1 UREA Dosing LNT SDPF SCR ASC TP Aftertreatment layout with Dual Urea dosing GEN2 1st UREA Dosing 2nd UREA Dosing LNT SDPF SCR SCR ASC TP 2 Februar 218 7

8 Content Project Motivation Aftertreatment Layout Challenge to achieve lowest Emissions Development Results Vehicle Summary and Next steps 2 Februar 218 8

9 Temperature EAS Challenge to achieve lowest Emissions Low pressure EGR Temporary e-machine assistance Power reduction Major challenges: High power and high mass flow Optimum EAS efficiency EAS efficiency Increase of EAS volumina 2 nd UREA Dosing Automatic upshift Space velocity 2 Februar 218 9

10 Temperature EAS Challenge to achieve lowest Emissions Low pressure EGR Temporary e-machine assistance Power reduction Major challenges: High power and high mass flow Optimum EAS efficiency EAS efficiency Increase of EAS volumina 2 nd UREA Dosing Automatic upshift Low temperature thermomanagement Space velocity E-Cat, Early Exhaust Valve Open, Cylinder deactivation ICE torque stabilization for LNT purging Temporary e-machine generator load 2 Februar 218 1

11 Temperature EAS Challenge to achieve lowest Emissions Low pressure EGR Temporary e-machine assistance Power reduction Major challenges: High power and high mass flow Optimum EAS efficiency EAS efficiency Space velocity Increase of EAS volumina 2 nd UREA Dosing Automatic upshift Low temperature thermomanagement Catalyst aging Reduction of LNT aging by e-machine assistance during purging Avoidance of Drop To Idle events Assistance and optimized operation strategy (mild hybrid) E-Cat, Early Exhaust Valve Open, Cylinder deactivation ICE torque stabilization for LNT purging Temporary e-machine generator load 2 Februar

12 Temperature EAS Challenge to achieve lowest Emissions Low pressure EGR Temporary e-machine assistance Power reduction Major challenges: High power and high mass flow Optimum EAS efficiency EAS efficiency Space velocity Increase of EAS volumina 2 nd UREA Dosing Automatic upshift Low temperature thermomanagement Catalyst aging Reduction of LNT aging by e-machine assistance during purging Avoidance of Drop To Idle events Assistance and optimized operation strategy (mild hybrid) E-Cat, Early Exhaust Valve Open, Cylinder deactivation ICE torque stabilization for LNT purging Temporary e-machine generator load 2 Februar

13 Content Project Motivation Aftertreatment Layout Challenge to achieve lowest Emissions Development Results Vehicle Summary and Next steps 2 Februar

14 Development Results Vehicle Single SCR Dosing without ECAT 2 Februar

15 Development Results Vehicle Single SCR Dosing without ECAT Cycle boundaries Moderate driven, v*a+ = 15.8m²/s³ Without ECAT Single UREA dosing Aged aftertreatment 2 Februar

16 Speed [km/h] NOx emissions [g] Temperature [ C] Development Results Vehicle Single SCR Dosing without ECAT Cycle boundaries Moderate driven, v*a+ = 15.8m²/s³ Without ECAT Single UREA dosing Aged aftertreatment Results: The LNT can convert 3% of the total NOx, with the main focus in the city part The SDPF is reaching a NOx conversion of 47% The passive underfloor SCR/ASC can support the system to a total NOx conversion of 89% LNT_T ( C) SDPF_T ( C) SCR_T ( C) NOx_EO NOx_dsLNT NOx_dsSDPF NOx_TP Speed 3% 47% 89% EO LNT SDPF TP time [s] 2 Februar

17 Development Results Vehicle Single SCR Dosing without ECAT Cycle boundaries Moderate driven, v*a+ = 15.8m²/s³ Without ECAT Single UREA dosing Aged aftertreatment Results: Without the usage of the ECAT in the city and rural part it is possible to reach a CF of.4 Due to the high temperature at the SDPF in the motorway part the CF is above 1.5 Fuel consumption 6.8 l / 1km Urea consumption 1.33 l / 1km 2 Februar

18 Development Results Vehicle Single SCR Dosing with ECAT 2 Februar

19 Development Results Vehicle Single SCR Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 16.m²/s³ With ECAT Single UREA dosing Aged aftertreatment 2 Februar

20 Speed [km/h] NOx emissions [g] Temperature [ C] Power E-Heater [kw] Development Results Vehicle Single SCR Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 16.m²/s³ With ECAT Single UREA dosing Aged aftertreatment Results: With the support of the ECAT the LNT can convert 4% of the total NOx, with the main focus in the city part The SDPF is reaching a NOx conversion of 5% The passive underfloor SCR/ASC can support the system to a total NOx conversion of 92% LNT_T ( C) SDPF_T ( C) SCR_T ( C) NOx_EO NOx_dsLNT NOx_dsSDPF NOx_TP Speed 3% 4% 47% 5% 89% 92% EO LNT SDPF TP time [s] 2 Februar 218 2

21 Development Results Vehicle Single SCR Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 16.m²/s³ With ECAT Single UREA dosing Aged aftertreatment Results: The ECAT is improving the total NOx conversion in the city and in the rural part CF below.3 The ECAT is not able to change the behavior in the motorway part CF is still above 1.5 Fuel consumption 6.6 l / 1km Urea consumption 1.29 l / 1km 2 Februar

22 Development Results Vehicle Dual UREA Dosing with ECAT 2 Februar

23 Development Results Vehicle Dual UREA Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 15.m²/s³ With ECAT Dual UREA dosing Aged aftertreatment 2 Februar

24 Speed [km/h] NOx emissions [g] Temperature [ C] Power E-Heater [kw] Development Results Vehicle Dual UREA Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 15.m²/s³ With ECAT Dual UREA dosing Aged aftertreatment Results: The LNT performance is unchanged by using the 2 nd urea dosing 4% In the rural part the SDPF dosing is reduced and by that the conversion is reduced to 42% By improving the NOx conversion in the motorway part the overall NOx conversion is 97% LNT_T ( C) SDPF_T ( C) SCR_T ( C) NOx_EO NOx_dsLNT NOx_dsSDPF NOx_TP Speed Cycle_NOx_EO_3 mg/km 611 Cycle_NOx_dsLNT mg/km 366 Cycle_NOx_dsSDPF mg/km 215 Cycle_NOx_TP mg/km 17 Preferred operation window for SDPF 4% 4% 5% 42% 92% 97% 1 st UREA dosing 2 nd UREA dosing EO LNT SDPF TP time [s] 2 Februar

25 Development Results Vehicle Dual UREA Dosing with ECAT Cycle boundaries Moderate driven, v*a+ = 15.m²/s³ With ECAT Dual UREA dosing Aged aftertreatment Results: The NOx conversion in the city and rural part is not effected by the second dosing unite CF still below.3 With the second dosing unite in the underfloor a CF below.3 is possible Fuel consumption 6.6 l / 1km Urea consumption 1.27 l / 1km 2 Februar

26 Content Project Motivation Aftertreatment layout Challenge to achieve lowest emissions Development Results Vehicle Summary and Next steps 2 Februar

27 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea NOx - CF NOx - CF NOx - CF Summary Development Results 1 City Motorway Total Without the ECAT CF.8 2 Februar

28 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea NOx - CF NOx - CF NOx - CF Summary Development Results 1 City Motorway Total Without the ECAT CF.8 Including the ECAT CF.7 2 Februar

29 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea 1 Urea incl. ECAT incl. 2nd Urea NOx - CF NOx - CF NOx - CF Summary Development Results 1 City Motorway Total Without the ECAT CF.8 Including the ECAT CF.7 Using a 2nd Urea dosing CF.2 2 Februar

30 NOx Summary low dynamic Valid RDE cycle RDE cycle high dynamic & speed RDE min Ultra low load cycle NOx target RDE max and 16km/h RTS95 NEDC RDE moderate WLTC Low Smooth Straight Route Load Driving Influence External Conditions High Dynamic, Speed Curvy Route Improved Emission robustness 2 Februar 218 3

31 NOx Summary 11 low dynamic Valid RDE cycle RDE cycle high dynamic & speed Results 9 7 Ultra low load cycle NOx target RDE max and 16km/h GEN1 ECAT improves the NOx reduction in the low load operation 5 RDE min RTS NEDC RDE moderate WLTC -1 Low Smooth Straight Route Load Driving Influence External Conditions High Dynamic, Speed Curvy Route Improved Emission robustness in low load 2 Februar

32 NOx Summary 11 low dynamic Valid RDE cycle RDE cycle high dynamic & speed Results 9 7 Ultra low load cycle NOx target RDE max and 16km/h GEN1 ECAT improves the NOx reduction in the low load operation 5 RDE min RTS Low NEDC RDE moderate Load WLTC High GEN2 Dual Urea dosing improves the NOx reduction in high load operation / high temperature Smooth Driving Influence Dynamic, Speed Straight Route External Conditions Curvy Route Improved Emission robustness in high load 2 Februar

33 NOx NEXT steps 11 low dynamic Valid RDE cycle RDE cycle high dynamic & speed Results 9 7 Ultra low load cycle NOx target RDE max and 16km/h GEN1 ECAT improves the NOx reduction in the low load operation 5 RDE min RTS Low Smooth NEDC WLTC RDE moderate Load Driving Influence High Dynamic, Speed GEN2 Dual Urea dosing improves the NOx reduction in high load operation / high temperature GEN3 Hybridization with P/P2 Straight Route External Conditions Curvy Route Improved NOx and CO2 emissions 2 Februar

34 Thank You