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Ultra-low Emission Powertrain Concept for Meeting Future Emission Requirements beyond BS 6
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on September 22, 2021 by SAE International in United States
India migrated to first phase of BS 6 legislations from April 2020. Indian Government is planning to introduce the second phase of BS 6 with RDE cycle related legislations from year 2023 onwards. There is also a new legislation (CAFÉ) regarding fleet CO2 emission coming into place in year 2022. The Indian Automotive industry has already been working on solutions to meet these immediate next legislative requirements. The next question in front of industry now is to see and plan for what lies beyond BS 6 second phase and the proposed CAFÉ norms. Europe and China have already been discussing on these future emission legislations where the tailpipe NOx emissions as low as 35 mg/ km is being considered for Diesel engines with RDE cycle. Europe is also considering reduction by 15% from 2025 onwards in fleet CO2 target of 95 g/km with WLTC cycle which is getting implemented by 2021. This study presents the technologies required on the engine and the exhaust after treatment to meet these ultra-low emission requirements. For this study a Diesel SUV has been selected from Indian market with 2 L 4 Cylinder engine. Technologies on the engine like HP+ LP EGR with by-pass, fuel injection pressure > 2000 bar, injection rate shaping, high load EGR cooler have been evaluated. Friction reduction measures like steel piston, form honing, piston cooling etc. have also been evaluated. On the exhaust side twin dozing SCR system with a combination of either LNT or DOC has been evaluated. Low thermal mass SCR and turbine by-pass & exhaust system insulation has been also studied for faster EATS light-off .The requirements of DPF will still be mandatory. Also mild hybridization with 48 V system has been evaluated. The study includes the cost analysis showing the increase in powertrain cost with addition of these technologies. All the evaluations are performed on Mean Value Engine Model (MVEM) developed in MATLAB/SIMULINK by FEV. The tool chain allows engine & vehicle with opportunity of simultaneous optimization of base engine, exhaust after-treatments system along with hybrid layouts simultaneously.
- Markus Ehrly - FEV Europe GmbH
- Thomas Körfer - FEV Group GmbH
- Ashraf Emran - Fev India Pvt. Ltd.
- RAJESH S K - Fev India Pvt. Ltd.
- Rouble sandhu - Fev India Pvt. Ltd.
- Vijay Sharma - Fev India Pvt. Ltd.
- Ashraf Emran - FEV India Pvt Ltd
- RAJESH S K - FEV India Pvt Ltd
- Rouble sandhu - FEV India Pvt Ltd
- Vijay Sharma - FEV India Pvt Ltd