|Tractor News > 2002|
John Deere Infinitely Variable Transmission (IVT)Deere & Company - August 29, 2002
There are times when operating in the field, that it is almost impossible to find just the right gear to optimize the productivity of a tractor. Different field conditions dictate shifting up or down, and still the optimal gear is difficult to find. No matter how many gears are available, the operator could still use another gear to fine tune field speed and performance.
John Deere has found a solution to this problem with the revolutionary new John Deere Infinitely Variable Transmission (IVT). This new transmission is now available on the 7000 TEN Series, 7020 Series, and 6420 Tractors. The John Deere IVT is the benchmark of operator control, comfort, and productivity for any tractor on the market and features infinitely variable speed selection from 164 ft/hr to 25 mph.
"No longer will an operator be looking for the correct gear," says Don Worner, division manager, marketing, Waterloo Works. "The John Deere IVT allows an infinite selection, and the operator can very easily choose the ideal field and performance speed, without clutching, to get the most efficiency out of the tractor."
The John Deere IVT Control System automatically maximizes fuel efficiency in medium and light load conditions. By simply selecting the Fuel Economy mode, operators ensure constant vehicle speed at reduced engine rpm levels, which increases overall fuel economy. Because of the lowered engine speed, in-tractor noise levels and long-term durability are also greatly enhanced.
A special Load Control Mode also provides automatic transmission ratio changes under load to maintain constant peak power levels, when needed to pull through tough spots in the field or during transport.
Because of a footbrake, with integrated AutoClutch, there is no clutching with John Deere IVT. The operator can stop the tractor at any speed or engine rpm by simply depressing the foot brakes. To resume speed, the operator releases the brakes and the tractor accelerates to its previously commanded speed.
There is also a Left-Hand Reverser with a PowerZero function that will stop the tractor and hold it stationary whatever the engine rpm or slope. By moving the Left-Hand Reverser lever to the PowerZero Position, the operator can stop the tractor on a hill or maintain a powered stop position during loader work. Reengaging the reverser lever into the desired travel direction will move the tractor, without rolling before movement. This is a very efficient, simple system to operate.
"Without complicated and numerous controls, the John Deere IVT requires only three steps," explains Worner. "The operator starts the tractor, selects direction of movement with the Left-Hand Reverser, and accelerates using the hand or foot throttle."
The operator is able to select infinite ground speeds with the Speed Control Lever located conveniently on the front right side of the operator console. The John Deere IVT comes with a transport speed of 25-mph with reduced engine rpm while in economy mode to save fuel. A creeper mode will automatically activate if a speed of 1.2-mph or less is selected. This feature is standard equipment on all John Deere IVT tractors.
"The John Deere IVT system allows the operator a higher comfort level," says Worner. "There are fully automatic ratio changes that reduce fuel consumption, and allow the tractor to work more acres in less time. This highly productive transmission is simple to operate and will add years of reliable service to a producer and his operation."