Shift control system for troidal continuously variable transmission
First Claim
1. A shift control system for a troidal continuously variable transmission provided with input and output discs and power rollers frictionally engaged with the input and output discs for ensuring power transmission therebetween, the shift control system serving to make, in accordance with a shift command value, the power rollers be offset with respect to a position wherein a rotation axis thereof and a rotation axis of the input and output discs cross each other so as to produce tilting of the power rollers about an oscillating axis perpendicular to the rotation axis thereof, the shift control system serving to return the power rollers to the position so as to maintain the shift command value as achieved, the shift control system comprising:
- an electronic system arranged to calculate the shift command value;
a first electronic feedback system connected to said electronic system, said first electronic feedback system serving to feed back a first physical quantity indicative of a tilting angle of the power rollers; and
a second electronic feedback system connected to said electronic system, said second electronic feedback system serving to feed back a second physical quantity indicative of a speed of change of said tilting angle of the power rollers,said electronic system calculating the shift command value in accordance with said first and second physical quantities.
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Accused Products
Abstract
A shift control system for a troidal continuously variable transmission comprises an electronic system for calculating a shift command value, a first electronic feedback system for feeding back a first physical quantity indicative of the tilting angle of power rollers, and a second electronic feedback system for feeding back a second physical quantity indicative of a speed of change of the tilting angle of the power rollers, the electronic system calculating the shift command value in accordance with the first and second physical quantities.
99 Citations
16 Claims
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1. A shift control system for a troidal continuously variable transmission provided with input and output discs and power rollers frictionally engaged with the input and output discs for ensuring power transmission therebetween, the shift control system serving to make, in accordance with a shift command value, the power rollers be offset with respect to a position wherein a rotation axis thereof and a rotation axis of the input and output discs cross each other so as to produce tilting of the power rollers about an oscillating axis perpendicular to the rotation axis thereof, the shift control system serving to return the power rollers to the position so as to maintain the shift command value as achieved, the shift control system comprising:
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an electronic system arranged to calculate the shift command value; a first electronic feedback system connected to said electronic system, said first electronic feedback system serving to feed back a first physical quantity indicative of a tilting angle of the power rollers; and a second electronic feedback system connected to said electronic system, said second electronic feedback system serving to feed back a second physical quantity indicative of a speed of change of said tilting angle of the power rollers, said electronic system calculating the shift command value in accordance with said first and second physical quantities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A shift control system for a troidal continuously variable transmission provided with input and output discs and power rollers frictionally engaged with the input and output discs for ensuring power transmission therebetween, the shift control system serving to make, in accordance with a shift command value, the power rollers be offset with respect to a position wherein a rotation axis thereof and a rotation axis of the input and output discs cross each other so as to produce tilting of the power rollers about an oscillating axis perpendicular to the rotation axis thereof, the shift control system serving to return the power rollers to the position so as to maintain the shift command value as achieved, the shift control system comprising:
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means for calculating the shift command value; means, connected to said calculating means, for electronically feeding back a first physical quantity indicative of a tilting angle of the power rollers; and means, connected to said calculating means, for electronically feeding back a second physical quantity indicative of a speed of change of said tilting angle of the power rollers, said calculating means calculating the shift command value in accordance with said first and second physical quantities.
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16. In a troidal continuously variable transmission:
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input and output discs; power rollers frictionally engaged with said input and output discs for ensuring power transmission therebetween; and a shift control system arranged to operate on said power rollers for ensuring shifting, said shift control system serving to make, in accordance with a shift command value, said power rollers be offset with respect to a position wherein a rotation axis thereof and a rotation axis of said input and output discs cross each other so as to produce tilting of said power rollers about an oscillating axis perpendicular to said rotation axis thereof, said shift control system serving to return said power rollers to said position so as to maintain said shift command value as achieved, said shift control system comprising; an electronic system arranged to calculate said shift command value; a first electronic feedback system connected to said electronic system, said first electronic feedback system serving to feed back a first physical quantity indicative of a tilting angle of said power rollers; and a second electronic feedback system connected to said electronic system, said second electronic feedback system serving to feed back a second physical quantity indicative of a speed of change of said tilting angle of said power rollers, said electronic system calculating said shift command value in accordance with said first and second physical quantities.
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Specification