Title: Development of hybrid automotive transmissions

Authors: Süreyya Nejat Doğan; Tobias Gödecke; Michael Weiss; Joachim Pollak

Addresses: RD/PT Research & Development Powertrain, Daimler AG, HPC D128, Mercedesstr 122, 70372 Stuttgart, Germany ' RD/PTM Research & Development Manual Transmission, Daimler AG, HPC D102, Mercedesstr 122, 70372 Stuttgart, Germany ' PL/ECH Strategic Project Hybrid, Daimler AG, HPC X459, Bela-Barenyi-Str 1, 71063 Sindelfingen, Germany ' RD/PTA Research & Development Automatic Transmission, Daimler AG, HPC D105, Mercedesstr 122, 70372 Stuttgart, Germany

Abstract: The ML 450 HYBRID is the first Mercedes-Benz full hybrid vehicle with the Advanced Hybrid System-Cars (AHS-C) two-mode hybrid transmission, promising significant fuel consumption and emission reductions. The transmission is central to the hybrid powertrain system with the main features of great efficiency both in inner city 'stop and go' traffic and on long-distance journeys at increasing engine loads and higher speed ranges. It enables the vehicle to be driven under purely electrical power, by the Internal Combustion Engine (ICE) alone via direct gears or by a combination of both. The hybrid transmission AHS-C has two electric traction motors, three planetary gear sets and an internal electric motor to drive the oil pump.

Keywords: hybrid transmissions; full hybrid powertrain; automotive transmission; fuel economy; alternative powertrain; fuel consumption; emission reduction; hybrid electric vehicles; HEVs.

DOI: 10.1504/IJPT.2012.048406

International Journal of Powertrains, 2012 Vol.1 No.3, pp.244 - 258

Received: 18 Oct 2010
Accepted: 21 Aug 2011
Published online: 05 Dec 2014 *

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