2015 ASR

2015 ASR optimises wheelspin

One would think that less wheelslip means better traction. When it comes to tractors, however, somewhere between 20 and 30 percent wheelslip when working on fields achieves the best combination of pulling power and fuel consumption. If fuel consumption is not an issue, then the optimal pulling power is achieved with up to 50 percent wheelslip.

Valtra introduced Automatic Slip Regulation (ASR) on its fourth generation N and T Series tractors. The system automatically regulates wheelslip by measuring the speed of the wheels and compares this to the ground speed as measured by a sensor and other variables. If the system detects too much wheelslip, it automatically reduces engine revs.

Wheelslip limits can be set to one of five levels ranging from 10 to 50 percent. The lowest setting (1) is suitable for very slippery conditions, such as on icy roads, while the highest setting (5) is ideal for heavy mud. Settings 2 and 3 are suitable for most tasks on fields.


Watch animation about how ASR works