Allison’s xFE Transmission Modifications Improve Fuel Consumption Rates in Midbuses

Recently unveiled results of test drives of a midibus that come with Allison’s xFE transmission hardware and FuelSense® 2.0 software have allowed to achieve improved fuel economy. The months-long field tests proved cost-effectiveness of using Allison’s upgrade package in midibuses.


Within the frame of this remarkable testing project, which has been launched last summer and still goes on, specialists from Allison and the British bus maker ADL have monitored fuel rates during the routine operation of an ADL Enviro200 bus that comes with an Allison T 2100 unit. It should be pointed out that both parties performed these tests independently. As a result of this long-time experiment, ADL has come up with an upgrade program for UK-based customers using Allison Transmissions.


ADL Enviro200 bus during the trial


Let us take a closer look at numerical results of this project. Fuel rates of buses involved in the experiment were measured with and without any transmission upgrades, and then compared the results.


It has been clearly shown, after 36 thousand miles of testing, that the abovementioned gearbox updates can reduce expenditures by up to £2,000 per bus every year. If Go-Ahead (customer of ADL that provided its bus for the experiment) installed updates to each of its 14 buses that come with a T 2100 gearbox, it could reduce expenditures on fuel by £28,000 and significantly decrease CO2 emissions.


Allison 2100 xFE transmission


Allison’s xFE solution ensures additional fuel saving in addition to the fuel savings gained thanks to Allison’s FuelSense. The xFE’s design includes an advanced torque TC lockup clutch engaging 1st gear lock up at low speeds paired with FuelSense 2.0, turning the T 2100 xFE into an ideal solution for urban buses.



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