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Impacts of powertrain hybridization on engine exhaust behavior of heavy‑duty vehicles with electrified trailers

Thiem, Mikula and Hummel, Nicolas and Beidl, Christian (2019):
Impacts of powertrain hybridization on engine exhaust behavior of heavy‑duty vehicles with electrified trailers.
In: 6th international engine congress, Baden-Baden, 26.02. - 27.02.2019, [Conference or Workshop Item]

Abstract

Due to the steady growth of level of traffic with a concurrent rising shortage of fossil fuels, energy consumption reduction becomes more and more important in research and development of vehicle manufacturing. In the passenger car sector, hybridization of the vehicle powertrain has become the most promising approach for reduction of fuel consumption respectively CO2 emission and is already present in series production. Contrary, hybrid technology in heavy-duty vehicles can only be found in special-purpose vehicles for inner city operation. The concept introduced in this paper deals with hybridization of heavy duty vehicles and is designed for long-haul operation. Core of the concept is the electrification of one axis of the trailer, leaving the tractor a conventional vehicle. The concept is based on an electric propulsion unit, consisting of electric motors, power electronic, a traction battery and a control unit, all mounted on the trailer. By usage of a specific developed sensorial kingpin, the trailer becomes a stand-alone hybrid system, which can operate independent of the tractor vehicle. The task of the propulsion unit is the recuperation of kinetic energy by recuperative braking and the storage of this energy in the traction battery. Afterwards, the buffered energy can be used for electric traction support, for example in uphill driving situations. The reduction of combustion engine load leads to a reduction of fuel consumption and CO2 emission. Powertrain electrification also leads to different engine exhaust behaviour and thus to varying boundary conditions for the exhaust aftertreatment system. Investigation on the impacts of the hybrid powertrain on engine exhaust behaviour is done on an Engine-in-the-Loop (EiL) environment, which combines a realtime vehicle simulation with a real engine on the testbed. This setup allows the transfer of logged real-world driving scenarios to the testbed environment with the opportunity to compare the hybrid vehicle with the conventional one under completely reproducible boundary conditions like vehicle speed, traffic situation or ambient temperature.

Item Type: Conference or Workshop Item
Erschienen: 2019
Creators: Thiem, Mikula and Hummel, Nicolas and Beidl, Christian
Title: Impacts of powertrain hybridization on engine exhaust behavior of heavy‑duty vehicles with electrified trailers
Language: English
Abstract:

Due to the steady growth of level of traffic with a concurrent rising shortage of fossil fuels, energy consumption reduction becomes more and more important in research and development of vehicle manufacturing. In the passenger car sector, hybridization of the vehicle powertrain has become the most promising approach for reduction of fuel consumption respectively CO2 emission and is already present in series production. Contrary, hybrid technology in heavy-duty vehicles can only be found in special-purpose vehicles for inner city operation. The concept introduced in this paper deals with hybridization of heavy duty vehicles and is designed for long-haul operation. Core of the concept is the electrification of one axis of the trailer, leaving the tractor a conventional vehicle. The concept is based on an electric propulsion unit, consisting of electric motors, power electronic, a traction battery and a control unit, all mounted on the trailer. By usage of a specific developed sensorial kingpin, the trailer becomes a stand-alone hybrid system, which can operate independent of the tractor vehicle. The task of the propulsion unit is the recuperation of kinetic energy by recuperative braking and the storage of this energy in the traction battery. Afterwards, the buffered energy can be used for electric traction support, for example in uphill driving situations. The reduction of combustion engine load leads to a reduction of fuel consumption and CO2 emission. Powertrain electrification also leads to different engine exhaust behaviour and thus to varying boundary conditions for the exhaust aftertreatment system. Investigation on the impacts of the hybrid powertrain on engine exhaust behaviour is done on an Engine-in-the-Loop (EiL) environment, which combines a realtime vehicle simulation with a real engine on the testbed. This setup allows the transfer of logged real-world driving scenarios to the testbed environment with the opportunity to compare the hybrid vehicle with the conventional one under completely reproducible boundary conditions like vehicle speed, traffic situation or ambient temperature.

Uncontrolled Keywords: hybrid, heavy duty, evTrailer, engine-in-the-loop
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Internal Combustion Engines and Powertrain Systems (VKM)
Event Title: 6th international engine congress
Event Location: Baden-Baden
Event Dates: 26.02. - 27.02.2019
Date Deposited: 13 Mar 2019 06:19
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