Transmission specialist Oerlikon Graziano introduced a new EV transmission and the concept of a new modular front-wheel-drive hybrid transmission at the recent CTI Symposium and Transmission Expo in Berlin.
The new single-speed EV transmission is designed for maximum input torque of 270 N·m (199 lb-ft) and maximum input speed of 14,000 rpm. A new lubrication concept offers flexibility in the installation angle in order to allow compatibility with different vehicle layouts.
The transmission features a parking lock system with or without auxiliary actuation, designed to deliver a high level of functional integration with the electric motor to optimize powertrain weight and performance.
Oerlikon also presented a paper entitled “Modular P2-P3 Dedicated Hybrid Transmission for 48 V and HV applications.” Its new front-wheel-drive hybrid concept is based on existing OGeco transmission architecture, and enables full hybrid functionalities, such as load point shifting, eBoost, KERS, regeneration, hybrid drive and full electric drive.
The P2-P3 dedicated hybrid transmission is modular, based on a two-shaft single-clutch concept. A link between two main gears of the gearbox and the direct gearing between the electric machine and linked gear system, free-mounted on the primary shaft, is designed to give it a very efficient electrical path.
The transmission offers two different gear ratios between the electric machine and the secondary shaft. It’s designed to offer the advantages of both gas and electrical systems, for example: powershifting-P3, recuperation-P3, cranking-P2, KERS, and standstill charging-P2.