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Hybrid Powertrain Technology Assessment through an Integrated Simulation Approach

Schaeffler-Matthias Neveling
Continental-Naroa Zaldua-Moreno, Lorenzo Pace
Published 2019-09-09 by SAE International in United States
Global automotive fuel economy and emissions pressures mean that 48 V hybridisation will become a significant presence in the passenger car market. The complexity of powertrain solutions is increasing in order to further improve fuel economy for hybrid vehicles and maintain robust emissions performance. However, this results in complex interactions between technologies which are difficult to identify through traditional development approaches, resulting in sub-optimal solutions for either vehicle attributes or cost. The results presented in this paper are from a simulation programme focussed on the optimisation of various advanced powertrain technologies on 48 V hybrid vehicle platforms. The technologies assessed include an electrically heated catalyst, an insulated turbocharger, an electric water pump and a thermal management module. The novel simulation approach undertaken uses an integrated toolchain capturing thermal, electrical and mechanical energy usage across all powertrain sub-systems. Through integrating 0-D and 1-D sub-models into a single modelling environment, the operating strategy of the technologies can be optimised while capturing the synergies that exist between them. This approach enables improved and more informed cost/benefit ratios for…
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New Development Approach for Wet Motorcycle Clutch System

Schaeffler-Thomas Metzinger, Christoph Raber, Christoph Wittmann
Published 2014-11-11 by SAE International in United States
This paper discusses the design elements for a wet clutch system to successfully meet the requirements of today's motorcycle market. You can find new design ideas regarding how to realize important and critical clutch performance features such as torque boost, coast torque reduction (anti-hopping function), reduced actuation force, reduced drag torque, optimized weight, and/or optimized product cost. Most of these functions and features can be implemented in a modular clutch kit in which many of the parameters can be adapted with a minor design change of just a few components.
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