DSD to Share Techniques for Transmission Efficiency Improvement at CTI Shanghai Symposium

Optimisation of lubrication can help meet 2021 vehicle CO2 targets

Leamington Spa, UK, 19 August 2015 – At the 4th annual CTI Symposium in Shanghai, (16-18 Sept) driveline engineering specialist, Drive System Design (DSD), will show how optimising the lubrication of transmission and driveline assemblies can improve vehicle CO2 emissions by several g/km. The company will present a technical paper describing measures suitable for retro-fitting to existing transmissions and those steps more appropriate for new transmission designs, while underlining the importance of considering lubrication from the outset as part of a full systems approach.

“Chinese car manufacturers are currently working towards a 2020 CO2 emissions target of 120 g/km  and are facing a significant challenge to achieve the necessary efficiency improvements,” explained Alex Tylee-Birdsall, DSD’s Technical Director. “Optimising the lubrication of the transmission and driveline can make an important contribution without adding cost or affecting reliability, if done as part of an integrated, systems approach.”

DSD’s presentation will take delegates through the sources of energy loss and how they can be reduced through better management of the lubricant without adversely affecting wear, load capacity, cooling or NVH. In one example, oil with a higher Viscosity Index (VI) reduced losses by 36 percent; in another, designs to reduce oil churning saved 2g/km in CO2 emissions over the NEDC test cycle.

Every aspect of transmission design must be considered if the highest level of efficiency is to be achieved, according to Tylee-Birdsall. “The detail design of components such as synchronisers and wet clutch assemblies can have a significant effect on drag losses through fluid shearing, which can be greatly improved by correctly specifying features such as clearances and oil flow rates,” he said.

The paper, entitled ‘Lubrication Efficiency’, draws on DSD’s experience of improving transmission and axle efficiency for many clients across a range of sectors and will be presented on September 17th in Session C at 4:45pm at the Marriot Hotel Parkview, Shanghai.

About DSD
Drive System Design (DSD) is an award winning engineering consultancy specialising in the engineering, development and control of transmission and future driveline systems.

The company’s staff has experience working with vehicle manufacturers and Tier 1s around the world, designing new technologies and solving problems to make their products more competitive. It has the engineering, test, analysis and project management skills necessary to deliver projects to demanding timescales. Working closely with its customers through technical centres in Europe and North America, DSD is recognised as a world leading expert in driveline refinement, efficiency improvement and hybrid and electric vehicle transmissions.


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