Hybridized Diesel Powertrains for LCV applications to meet stringent 2025 norms for Emissions and CO2 FEV Group GmbH

Format:

Book

Conference/Event

Author/Creator:

Koerfer, Thomas, author.

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

The ever-increasing pressure to reduce greenhouse gas (GHG) emissions from the transport sector poses challenges to the industry as a whole. Since the release of the new European CO2 fleet emission targets with massive lowering demands in the upcoming years (-15% in 2025 and -37,5% in 2030 compared to the 2021 targets), substantial initiatives have been launched to ensure the development of affordable solutions to comply with these ambitious goals, while still meeting the market requirements. Diesel powered vehicles and, in particular, light-duty Diesel engines have been the main driver for continuous CO2 emission reductions in recent years. These achievements so far were mainly based on continuous enhancement of combustion efficiency and reduction of mechanical losses. Based on this experience, it appears very doubtful to achieve further significant fuel consumption and thus CO2 reductions with an improvement in engine technology alone. The double digit reduction steps requested by the authorities call for the implementation of new technologies and a full system approach.As purely electric propulsion systems gain increasing attractiveness for small vehicle applications and sports cars, heavier light-duty vehicles, which require a well balanced trade-off between costs and customer needs, demand different powertrain concepts, especially if heavy goods transportation and/or trailer towing are requested as well. For a proper safeguarding of both, upcoming legal GHG reduction norms as well as all-day operational duties, new powertrain concepts are needed. An attractive conceptual layout results from a mixed serial hybrid topology called DIESEL EMOTION. This powertrain concept features a tailored cost-optimized Diesel engine with a strong electric machine as a serial hybrid, while featuring in conjunction with a simple one-speed transmission a direct, highly efficient coupling of the engine with the wheels. The vehicle is mainly driven by the electrical machine, especially in urban operating regimes. But, as soon as vehicle speed and load exceed specified thresholds, the direct connection between engine crankshaft and driving wheels is enacted to realize best fuel efficiency. The paper in hand describes at first the conceptual layout of the advanced powertrain topology for heavy Light-Duty vehicle applications, balancing functional performance in the limited engine operational map with corresponding cost reduction measures. Furthermore, initial functional performance figures, especially in comparison to conventional powertrains and also to classical serial hybrid configurations, will be presented. The paper concludes with a summary and parameter ranking in order to determine next steps in realization and industrialization of the new concept

Notes:

Vendor supplied data

Publisher Number:

2020-01-2252

Access Restriction:

Restricted for use by site license