Increased performance for hybrid vehicles
eTWINSTER – the First New-Generation Electric Axle System
The GKN-developed eTWINSTER is the first next-generation electrical axle system, providing a step-change in efficiency and dynamic performance of hybrid vehicles.
Read the article written by Jan Haupt and Dirk Güth from GKN Driveline International GmbH in the actual CTI MAG May 2016:
Modern Approach in the Design of Compact Axle Gears
Axle designers face multiple challenges in the design of gear sets: increasing torque density requirements; growing demand for high levels of refinement; and continually improving efficiency targets. The discrepancies between actual manufactured tooth profiles and the geometry predicted by current simulation software, combined with currently under-developed analysis methods, make it increasingly difficult for the engineer to create robust designs, optimised within their package space, without extensive hardware testing and costly development loops.
Read the article written by Matt Hole and Ben Wisbey from Drive System Design in the actual CTI MAG May 2016:
Power-Shifting Made Easy for Stepped Automatic Transmissions
An IAV tool transforms complex transmissions to the generic interfaces of the generic power-shift sequence control – simplifying calibration and speeding up modeling
Read the article written by Roland Serway, Dr. Uwe Mettin and Alexander Lampe from IAV Automotive Engineering in the actual CTI MAG May 2016:
DCT Technology for Low-torque Applications
Besides offering more comfort, modern automatic transmissions should help for lower fuel consumption. The new dual-clutch transmissions 6DCT150 and 6DCT200 with cascaded first gear layout enable efficient automation even in the high-volume segment of small passenger cars. In the first reference application, the 6DCT150 enabled fuel consumption benefit of 5 % in comparison to a five-speed manual transmission in the NEDC.
Read the article written by Roland Nasdal, Sascha Mierbach and Udo Bernhardt from Getrag Ford Transmissions GmbH in the actual CTI MAG May 2016:
“In the Future, Everything Will be Hybrid”
One of the key topics at the 14th International CTI Symposium was DHT, a hybrid transmission designed exclusively for dedicated hybrid use. Toyota has favoured this approach for nearly 20 years. We spoke to Gerald Killmann, Vice President R&D, Toyota Motor Europe, about the future of hybrid powertrains.
Read the interview with Gerald Killmann, written by Gernot Goppelt, in the actual CTI MAG May 2016:
“We Have Created a Modular Dedicated Hybrid Transmission”
With just a few changes to its architecture, the 2nd generation Voltec hybrid drive comes with added value in terms of increased electric range, improved NVH and new hybrid operation modes. Customer data and feedback played a crucial role in designing the Gen 2 Voltec, says Larry T. Nitz, Executive Director Transmission & Electrification at General Motors.
Read the interview with Larry T. Nitz, written by Gernot Goppelt, in the actual CTI MAG May 2016:
CTI Symposia put CVTs centre stage:
Are the benefits of stepless transmissions still underrated?
The ideal: stepless acceleration!
In high-powered electric automobiles like Tesla models or the BMW i3, drivers can feel like pilots already. For powerful, seamless acceleration right up to full speed, they simply apply full thrust.
In conventional automobiles, automatic shift transmissions use high numbers of gearsteps to map that ideal as closely as possible. As an interesting alternative, stepless transmissions are now being discussed intensively again.
Read the full article here: http://www.transmission-symposium.com/en/are-the-benefits-of-stepless-transmissions-still-underrated/
DHT – a Model for the Future?
By definition, Dedicated Hybrid Transmissions (DHT) use at least two sources of propulsion: an ICE, and at least one e-machine. Without either of these sources, they are not fully functional. DHTs can offer several modes, for example serial, parallel, power-split CVT mode, all electric and ICE mode. Optionally, they do not require an additional launch element. What are the prospects for Dedicated Hybrid Transmissions?
Read the statements in the actual CTI MAG May 2016: