i will try....
Sliding Roller Weight ( US7276004 ) vs. Round Roller
People know that the round roller weight is not always "rolling" in the ramp (the runway for the roller ); actually the movement of RR (round roller weight) is a hybrid movement "rolling & sliding".
The features of Slider (sliding roller weight, or SR) are:
1. The shape of Slider is designed to
i. make its initial low position lower than that with stock round roller. So the low gear becomes much lower and therefore able to get a higher acceleration;
ii. form the flat front side of Slider, which enables the Slider move more outward than round roller does. Therefore, V-belt moves much higher; i.e., the high gear becomes much higher to get higher top end.
iii. Thus, the take-off rpm with Slider is about 300~500 rpm higher than that with round roller, and the top end rpm is 300~500 rpm lower than that with round roller.
Consequently the Slider can make the range of gear shift become broader.
2. Through the physics view, the work needed to move the Slider (from bottom to top position) is 2 x F (force) x S (distance of ramp) while the work needed to move the RR is 2 x F (force) x S + 1/2 x M V2,
This shows the movement of Slider is faster than RR.
3. The Slider is molded from material SL-9T (self-lubricated polyamide 46 ), which has low friction of coefficient, high wear resistance, high heat resistance and contains no abrasive filler (do not wear aluminum-made variator).
So, the durability of Slider is excellent.
4. The stability of gear shift ratio of SR is much better than the Round Roller
that means the fade of CVT performance is much less for SR.
