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48 V Diesel Hybrid - Advanced Powertrain Solution for Meeting Future Indian BS 6 Emission and CO2 Legislations

FEV India Pvt Ltd-Ashraf Emran, Rouble Sandhu, Sagar Chavan, Vijay Sharma
FEV Europe GmbH-Markus Ehrly
Published 2019-01-09 by SAE International in United States
The legislations on emission reduction is getting stringent everywhere in the world. India is following the same trend, with Government of India (GOI) declaring the nationwide implementation of BS 6 legislation by April 2020 and Real Driving Emission (RDE) Cycle relevant legislation by 2023. Additionally GOI is focusing on reduction of CO2 emissions by introduction of stringent fleet CO2 targets through CAFE regulation, making it mandatory for vehicle manufacturers to simultaneously work on gaseous emissions and CO2 emissions. Simultaneous NOx emission reduction and CO2 reduction measures are divergent in nature, but with a 48 V Diesel hybrid, this goal can be achieved.The study presented here involves arriving at the right future hybrid-powertrain layout for a Sports Utility Vehicle (SUV) in the Indian scenario to meet the future BS 6 and CAFÉ legislations. Diesel engines dominate the current LCV and SUV segments in India and the same trend can be expected to continue in future. An existing SUV from the Indian market has been selected as a target base vehicle for this study. The base SUV…
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Bharat Stage-V Solutions for Agricultural Engines for India Market

FEV India Pvt Ltd-Vijay Sharma, Ashraf Emran
FEV India Pvt, Ltd.-Devising Rathod
Published 2019-01-09 by SAE International in United States
The Bharat Stage (CEV/Tractor) IV & V emission legislations will come into force in Oct 2020 & Apr 2024 respectively, posing a major engineering challenge in terms of system complexity, reliability, costs and development time. Solutions for the EU Stage-V NRMM legislation in Europe, from which the BS-V limits are derived, have been developed and are ready for implementation.To a certain extent these European solutions can be transferred to the Indian market. However, certain market-specific challenges are yet to be defined and addressed. In addition, a challenging timeline has to be considered for application of advanced technologies and processes during the product development. In this presentation, the emission roadmap will be introduced in the beginning, followed by a discussion of potential technology solutions on the engine itself as well as on the after treatment components. This includes boosting and fuel injection technologies as well as different exhaust gas recirculation methods. Diesel engine concepts like SCR/SCRF only or SCR/SCRF plus EGR solutions, will also be discussed in addition to advanced engine and after treatment models for…
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Low Cost EV Platform for Three Wheeler Electrification Development

FEV India Pvt Ltd-Ajith Kumaran, Sarah Ahmad, Raviteja Chanumolu, Gaurav Sadekar, Mohan Joshi, Vijay Sharma
Published 2019-01-09 by SAE International in United States
This paper presents the FEV low cost EV platform intended to provide a modular and scalable platform for 2 and 3 wheelers that is robust and meets the desired performance characteristics. To enable this, we use a dedicated vehicle control unit (VCU) that is running FEV’s matured model library called PERSIST. The platform makes use of the inherent advantage of being a small scale vehicle that can be used with lower sized components or reduced set of components without compromising on safety. The electric vehicle platform will have modularly developed components and associated software and hardware with standardized interfaces. The electric power train includes support for standardized lithium ion batteries and a low cost vehicle control unit. This is required to not only safe guard the system overall but also be able to optimize the driving range, enhance drivability and to provide the driver with a more stable and secure interface for operating the vehicle. The expected rapid growth in the space demands that such platform based solutions are developed in order to cater to…
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NOx Model Calibration for BS VI Applications

FEV India Pvt Ltd-Chinmay Vivek Kulkarni, Devising Rathod, Vijay Sharma
Published 2019-01-09 by SAE International in United States
Challenging limits for NOx in BS VI emission legislation demand high performance conversion techniques. Exhaust after treatment systems such as Lean NOx Trap and selective catalytic reduction can provide effective reduction of Engine out NOx emissions. From the moment of engine start, these systems require reliable signal input of the NOx sensor. The efficient use of such DeNOx systems demands earliest possible activation of the upstream NOx sensor. However, attainment of the sensor dew point delays reliable measurements. Data collected from the emission test cycles, WLTC and NEDC indicates the unavailability of NOx sensor from the beginning of the test cycle. Hence, requirement of a NOx model is inevitable to estimate NOx emissions till sensor reaches its dew point. The scope of this paper is to elucidate the calibration process through which a robust estimation of the NOx emissions can be made in different engine modes along with varying ambient conditions. The NOx model is capable of estimating the real time NOx emission using a map based approach taking in to account multiple factors such…
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Coupled Dynamic Simulation of Two Stage Variable Compression Ratio (VCR) Connecting Rod Using Virtual Dynamics

SAE International Journal of Advances and Current Practices in Mobility

FEV India Pvt Ltd-Prashant Mane, Ralf Blum, Vijay Sharma
FEV Europe GmbH-Sebastian Sonnen, Alexander Uhlmann, Daniel Henaux
  • Journal Article
  • 2019-26-0031
Published 2019-01-09 by SAE International in United States
The fuel consumption of combustion engines requires continuous reduction to meet future CO2 fleet targets. The progression of emission legislations shifted the focus on PN and NOX emissions in real world driving scenarios (RDE). Recently, the monitoring of CO emissions puts high load fuel enrichment for component protection into focus and a ban on enrichment is widely expected. Hence, gasoline engine technologies, which enable Lambda 1 operation in the entire engine map are specifically promoted. Variable Compression Ratio (VCR) attacks all these topics already at the combustion process. In addition to the well-known CO2 capability, VCR also enables enlargement of the lambda 1 operation in gasoline engines as well as reduced NOX emissions in diesel engines. The basic principle of developed VCR solution is to change the effective length of the connecting rod (and thereby the compression ratio) in two stages by several millimeters. Basically, the VCR connecting rod consists of a mechanical and hydraulic system which is fed with oil by the connecting rod bearing. All functional elements to realize the variability such as…
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Bharat Stage VI Solutions for Commercial Engines for the India Market

FEV India Pvt Ltd-Devising Rathod
FEV GmbH-Stefano Ghetti
Published 2017-01-10 by SAE International in United States
The Bharat Stage VI (BS-VI) emission legislation will come into force in 2020, posing a major engineering challenge in terms of system complexity, reliability, cost and development time. Solutions for the EURO VI on-road legislation in Europe, from which the BS-VI limits are derived, have been developed and have already been implemented. To a certain level these European solutions can be transferred to the Indian market. However, several market-specific challenges are yet to be defined and addressed. In addition, a very strict timeline has to be considered for application of advanced technologies and processes during the product development. In this paper, the emission roadmap will be introduced in the beginning, followed by a discussion of potential technology solutions on the engine itself as well as on the exhaust aftertreatment side. This includes boosting and fuel injection technologies as well as different exhaust gas recirculation methods. Exhaust gas aftertreatment solutions like SCR only or SCR plus EGR solutions, will also be discussed in addition to advanced engine and aftertreatment models for the electronic control unit (ECU).…
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Tuning and Validation of DPF for India Market

FEV India Pvt Ltd-Bandu Shamrao Zagade, Vijay Sharma
FEV GmbH-Thomas Körfer
Published 2017-01-10 by SAE International in United States
In a move to curb vehicular pollution, Indian Government decided to bring forward the date for BSVI standards into effect from April 2020 while skipping the intermediate BSV stage. The plan to implement BSVI norms, which initially was scheduled for 2024 according to the National Auto Fuel Policy dated April 27, 2015, has now been slotted for April 2020. For particulate mass (PM) emissions to be brought down to the BS VI level (4.5mg/km), diesel passenger cars need to be fitted with a diesel particulate filter (DPF).The diesel particulate filter (DPF) is a device designed to remove soot from the exhaust gas of the diesel engine. DPF must be cleaned/regenerated from time to time else, it will block up. Optimized DPF calibration is the key for various challenges linked with its use as one of the effective PM reduction technology.In this paper, detailed study has been conducted on introduction of DPF in Indian driving conditions and current diesel fuel available on fuel outlets in urban as well as rural areas. Extensive data has been collected…
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