New Allison Transmissions Study Shows 5% Better Fuel Economy
A recent study from Allison Transmission shows better fuel economy when compared to an identical truck equipped with an Eaton Procision® transmission. A certified, third-party fuel economy testing facility tested the Allison 2500 SeriesTM automatic with FuelSense® technology against an equally-spec’d truck with an Eaton Procision dual clutch transmission (DCT) and found the amount of savings of the truck with the Allison Transmission to be five percent above the Eaton Procision vehicle.
What is DCT?
The DCT is the latest attempt to copy Allison’s unmatched reliability and powerful performance for commercial-duty start-stop cycles. Developed to act like a fully automatic transmission, the DCT is unproven to stand up under the stress and strain of your fleet.
An independent testing facility used the independent September 2015 revision of the SAE J1526 SAE Fuel Consumption Test Procedure (Engineering Method). This testing method has been specifically developed for the trucking industry to analyze fuel consumption on two of the most common duty-cycles: the ARB Heavy Heavy-Duty Diesel Truck (HHDDT) cycle and the ARB Urban Dynamometer Driving Schedule (UDDS) cycle.
Thanks to its torque converter, an Allison fully automatic transmission accelerates more quickly and delivers a higher average speed than a DCT. While a DCT attempts to replicate the reliable, smooth power of a fully automatic transmission, it doesn’t multiply engine torque at the start. Its power is also interrupted in top ranges, decreasing performance.
New Shifting Technology Improves Fuel Economy
At the Work Truck Show® in March, Allison Transmission introduced its new FuelSense 2.0. This new evolution of Allison’s FuelSense package of features can save fleets more in fuel savings over the original version.
FuelSense 2.0 has logged nearly 3 million test miles in customer fleets, and has been found to be ideal for applications with heavy stop-start duty-cycles such as city busses, school busses, refuse, construction and distribution trucks. A key, fuel-savings component is DynActiveTM Shifting, a set of proprietary software enhancements that provide an infinitely variable combination of shift points. Instead of relying on fixed points in a shift table, the FuelSense 2.0 learning algorithm continuously finds the ideal balance of fuel economy and performance for a vehicle’s duty cycle.
Shifting Available in Packages
DynActive Shifting is combined with other improvements in fuel economy, provided in three FuelSense 2.0 packages: FuelSense 2.0, FuelSense 2.0 Plus, and FuelSense 2.0 Max. Both FuelSense 2.0 Plus and Max include an improved Neutral at Stop. This feature lowers fuel consumption and emissions by reducing or eliminating the load on the engine with the vehicle is stopped. Neutral at Stop prevents rollback of the vehicle, as well. Both versions lock the output while stopped to prevent rollback.
In addition to Neutral at Stop, FuelSense 2.0 Max also includes enhanced Acceleration Rate Management. This feature helps to counter aggressive driving by automatically controlling engine torque.
“FuelSense 2.0 offers increased specification flexibility and delivers the best economic value to our customers,” said Heidi Shutte, vice president of marketing and sales for the Americas with Allison Transmission.
PPG & Allison Transmissions
Pacific Power Group partners with Allison Transmissions to provide more than 300 of the world’s leading commercial and military manufacturers with premier, fully automatic transmissions for medium and heavy duty use.