Allison Transmission and Chinese bus manufacturer Zhongtong Bus have delivered 211 CNG city buses equipped with Allison T 270TM transmissions with retarder to the Armenian capital of Yerevan.
The Zhongtong buses, which have 25 seats and carry up to 60 passengers, are powered by a 200hp Weichai CNG Euro V engine and an Allison T 270 fully automatic transmission with gross input torque of 900 Nm. The transmission has six forward speeds, one reverse and an integral retarder, which extends the life of the brakes and lowers maintenance costs.
“Allison’s fully automatic transmission has Allison’s patented Continuous Power Technology, which delivers smoother, seamless shifts providing superior passenger comfort, ” says Zhang Zhengwei, director, Zhongtong Bus North China. “It’s torque converter technology multiplies engine torque to significantly improve startability and launch, resulting in higher operational productivity which maximises the benefits of a natural gas engine.”
Like all Allison fully automatic transmissions, the Allison T 270 transmission features Allison’s 5th Generation Electronic Controls, which offer an enhanced array of smart controls designed for the specific needs of any application. Allison fully automatics require only periodic oil and filter changes meaning less downtime and lower life-cycle costs, thus achieving greater vehicle reliability with more uptime.