Volvo trucks get automatic all wheel drivePOSTED BY Nigel Andretti ON 14 May 2015
VOLVO Trucks is introducing automatic all wheel drive, a feature it calls Automatic Traction Control on construction trucks.
ATC activates the drive on the front axle automatically when in motion, if the truck risks getting stuck — when the rear wheels lose traction on slippery or soft ground.
The driver enjoys improved maneuverability, and the owner benefits from lower fuel consumption and less wear and tear on the truck.
“Many drivers connect front-wheel drive or differential lock in good time before a difficult section of terrain, in order to avoid getting stuck. Volvo Automatic Traction Control engages the front wheel drive when in motion, and only for the short time that it is really needed,” said Jonas Odermalm, construction segment manager at Volvo Trucks in a statement.
The solution consists of software connected to the wheel speed sensors which detect and control wheel drive. When a rear wheel starts to slip, the power moves automatically to the front wheels without the truck losing torque or speed.
A dog clutch activates the front-wheel drive in just half a second. The clutch is lighter and has fewer moving parts than a traditional solution with permanent all-wheel drive.
If the driver encounters particularly rough ground, then it is possible to manually lock the other differentials at both front and rear.
The drive on the front axle prevents standstills on slippery surfaces. At the same time, the function is often only required for a very small part of the total driving time.
With Automatic Traction Control, the front tyres’ grip is concentrated on the steering right up until any critical situation. Thus, the driver can take advantage of the better maneuverability for as long as possible.
The driver also avoids extra fuel consumption and wear on the driveline and tires, that the constant engagement of front-wheel drive normally results in. Automatic Traction Control ensures that the optimal drive combination is always enabled and removes the decision from the driver.
Volvo Automatic Traction Control, which has now become standard in the Volvo FMX with driven front axle, is already used by Volvo Construction Equipment in their articulated haulers.
Automatic Traction Control is standard on the Volvo FMX in versions 4*4, 6*6, as well as 8*6 and is offered with the complete engine programme for Euro standards 3, 4, 5 and 6.