On May 6, 2010, Allison Transmission, the world's leading supplier of fully automatic commercial gearboxes and hybrids, introduced new products in its T-series, the T390 and T390R gearboxes. Integrate the function of the power system to increase the torque, improve the durability of the vehicle, shift quality and fuel economy.
The two new products were developed by Allison Transmission based on the growing market demand for engine power and torque. Allison's shifting energy management features variably manages torque through gearboxes, seamlessly adjusts engine torque and clutch load during shifts and during shifts to reduce operating temperatures for increased durability , increase power load. Thanks to this feature, the T390 and T390R gearboxes can increase the input torque by 200 Newton meters compared to the T375 and T375R models when used on buses.
"As the power and torque continue to increase, passenger car manufacturers still hope Allison's transmissions will remain lightweight and compact," said Rich Price, Asia-Pacific director of application engineering. "That is why Allison has developed The SEM function, which not only satisfies the design and market demands of the current global vehicle manufacturers, but also can play an advantage in the growing market demand in the future."
Allison's new T390 and T390R are ideal for city buses, coaches and intercity buses, with a power of 380 horsepower and 1,650 Newton meters. T390R with retarder and T390 without, two different models to meet the needs of different users, with retarder models can provide additional braking force for the vehicle.
"To ensure that Allison has the best performance for improving fuel economy software capabilities, Allison has introduced a shift energy management function (SEM) in this new product launch," said Rich Price. Land uses a load-based shift program (LBSS) to ensure stable operation of the vehicle's acceleration control function (VAC) and super economy shift program (SESS)."
“Allison developed a super economic shift program that monitors operating conditions and automatically initiates economic mode shift programs, allowing the engine to run at as low a speed as possible, while the vehicle remains in the highest possible gear, even at low speeds. It can also improve fuel economy; vehicle acceleration control functions can monitor and control the driver's driving to achieve smooth shifts in specific operating conditions, improve fuel efficiency in the acceleration process to improve fuel economy,†said Rich Price.
“As of now, Allison has had a series of functions to improve comprehensive fuel efficiency,†Rich Price concluded. “The technologies previously used in the automatic shutdown of the T-Series products and the reduction of engine load during shutdown have long been market proven. These features are all designed to help fleet operators reduce fuel consumption."
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