Steve Brew is Project Manager Sales and Technical Acquisitions for ZF Friedrichshafen AG, parent company of ZF Services UK.
The Repower project was undertaken in partnership with South West Trains and Porterbrook Leasing. It saw fuel savings average 17% when conventional hydrodynamic units on a two-car Class 158 DMU in passenger service were replaced with two ZF Ecomat Rail automatic reversing transmissions.
The 50,000 mile trial also recorded significantly less oil waste, the release of cooling system capacity and an improved customer experience in ride comfort. Integrating the ZF solution into existing DMUs achieves a significant reduction in life-cycle costs and the cost of fitting can be recovered over a relatively short period of operation.
Steve said: “We have driven these units the equivalent distance of twice around the globe and it has totally proven the ZF Repowering concept and the technology.”
The ZF automatic reversing transmissions feature a highly efficient torque converter that provides very high comfort when starting and enables optimum acceleration thanks to gear changes without tractive force interruption.
Fine-stepped gears keep the engine in an economical speed range, especially when driving at low speeds. The installed Rail Drive Control System makes integrating the complete driveline into the train easy and is, therefore, the ideal interface to the Train Control Unit.