28-11-2012, 06:36 PM
New Technological Inventions
1New Technological.pptx (Size: 2.25 MB / Downloads: 40)
What is a CVT?
CVT stands for Continuously Variable Transmission.
In theory the CVT is an ideal design.
It varies the transmission ratio continuously so could say it is an automatic transmission with an infinite number of ratios. As a result, at any time the most suitable ratio can be chosen so that performance and energy efficiency are both optimised. Theoretically it looks very simple, but the implementation is very difficult.
Metal Push Belt CVT:
Uses a pair of axially adjustable sets of pulley halves(Variators).
Both pulleys have one fixed and one adjustable pulley halve.
The transmission ratio is varied by adjusting the spacing between the pulleys in line with the circumference of the tapered pulley halves.
A “belt” is used to transfers the engine's power from one shaft to another.
The variators are adjusted hydraulically.
When one pulley is varied, the other pulley must adapt itself inversely since the length of the belt is fixed.
Future of CVT’s:
The internal combustion (IC) engine is nearing both perfection and obsolescence; advancements in fuel economy and emissions have effectively stalled.
CVTs could potentially allow IC vehicles to meet the first wave of new fuel regulations
As CVT development continues, costs will be reduced further and performance will continue to increase.
This cycle of improvement will ultimately giveCVTs a solid foundation in the world’s automotive infrastructure.
Conclusions
A new and efficient driving principle for auxiliary equipment on distribution trucks is presented
A small and compact CVT-unit is used to transform the variable engine speed into an optimal or constant speed
The performance of the auxiliary equipment can be optimized to performance, fuel-efficiency or noise-emission
The CS-PTO has a big market potential and many new applications are developed