Cab suspension on tractors have become increasingly popular but, to date, systems have been "passive", meaning that spring and dampening settings have been made on the basis of specific design criteria and are fixed. The result is a compromise, and a cab suspension that is good on road may not be the best off road.
Valtra have now developed a semi-active cab suspension system – AutoComfort - that automatically adjusts to different driving conditions.
AutoComfort consists of electronically controlled shock absorbers, a position sensor and control unit connected to the tractor via a CAN bus plus air springs to maintain a steady height regardless of load. Reacting to movement data from the position sensor and information about driving conditions from the CAN bus, the system is capable of adjusting the rate of shock absorption every two milliseconds. As an example, using information on the position of the shuttle and brakes, via the CAN bus the system will automatically react to prevent bouncing.
AutoComfort can be set to operate automatically or manually on the cab control panel.
Improving driving comfort is extremely important and as Valtra T Series machines are popular with contractors and large farms; those affected by the EU Vibration Directive for salaried employees. AutoComfort also helps Valtra's customers reduce vibration levels and farmers not affected by the directive will appreciate the enhanced comfort.
AutoComfort will be available as an option from the beginning of 2008 on Valtra's T Series 151e-191 Advance and HiTech models. When ordered with AutoComfort, the Aires front axle suspension includes automatic height control, which further enhances driving comfort while minimising the use of compressed air and antifreeze.
Award
Semi-active AutoComfort cab suspension received the Silver Innovation Award at the Agritechnica exhibition in Hanover, Germany in 2007.
Valtra will be found in Hall 9 stand E22 at Agritechnica.
