MTU HYBRID RAIL DRIVES FOR IRISH RAIL AND PORTERBROOK
Rolls-Royce has achieved a pioneering breakthrough for hybrid rail drive systems.
Both Iarnród Éireann Irish Rail, the state railway of the Republic of Ireland, and Porterbrook, the UK’s largest rolling stock leasing company, have signed contracts with Rolls-Royce to supply MTU Hybrid PowerPacks.
MTU’s Hybrid PowerPack is an environmentally friendly drive system that combines the benefits of battery-powered and diesel-powered traction systems. It combines an MTU diesel engine, built to EU Stage V requirements, with an electric unit that can function both as a motor and as a generator, and with the MTU EnergyPack battery system that stores energy recovered during braking. This enables, among other benefits, operations with zero local emissions under battery power. In station areas, traction noise is reduced by around 75% (20 dB(A)). Consumption and CO2 emissions are cut by up to 25%.
Operating costs of vehicles fitted with hybrid drives are also significantly lower, and even brake pads and discs have reduced wear due to brake energy recuperation. As a result of the additional power of the electric machine, train operators also have the option to improve journey times through better acceleration.