STEADY-STATE AND TRANSITORY CONTROL FOR TRANSMISSION BETWEEN ENGINE AND ELECTRICAL POWER GENERATOR
First Claim
1. A system for transmitting a variable output of a variable source of mechanical power into an input having a desired apparatus speed value for an apparatus, the system comprising:
- a transmission receiving the variable output and producing the input, the transmission defining a transmission ratio between a first speed of the output and a second speed of the input;
a first sensor measuring the first speed and producing first speed data corresponding thereto;
a second sensor measuring the second speed and producing second speed data corresponding thereto;
a third sensor measuring a power demand of the apparatus and producing power demand data corresponding thereto;
a ratio set point controller receiving the first and second speed data and the power demand data, the ratio set point controller calculating an available power of the source and a stability level of the system as a function of the first speed data and the power demand data, determining a desired source speed value for the first speed as a function of the power demand, calculating a desired ratio value for the transmission ratio as a function of the desired source speed value, and determining a desired rate of change for the transmission ratio as a function of the stability level of the system;
a ratio controller interfacing the ratio set point controller to the transmission, the ratio controller actuating the transmission to change the transmission ratio to the desired ratio value following the desired rate of change; and
a source speed controller receiving the second speed data from the second sensor and changing the first speed until the second speed data corresponds to the desired apparatus speed value.
3 Assignments
0 Petitions
Accused Products
Abstract
A system (1) for transforming a variable output into an input having a desired speed value, including a transmission (30) receiving the output having a first speed (Ve) and producing the input having a second speed (Vgen), first, second and third sensors (12,10,7) producing data (39,32,37) corresponding to the first speed (Ve), second speed (Vgen) and a power demand (Pdem) for the input, a ratio set point controller (34), a ratio controller (36) and a speed controller (4). The ratio set point controller (34) receives the data (39,32,37) and calculates an available power (Pav), a stability level of the system (S,U1,U2), a desired value for the first speed (Ve), and a desired value and rate of change for the transmission ratio. The ratio controller (36) interfaces the ratio set point controller (34) and actuates the transmission (30) to change the transmission ratio to the desired value following the desired rate of change. The speed controller (4) changes the first speed (Ve) until the second speed (Vgen) corresponds to the desired speed value.
119 Citations
88 Claims
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1. A system for transmitting a variable output of a variable source of mechanical power into an input having a desired apparatus speed value for an apparatus, the system comprising:
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a transmission receiving the variable output and producing the input, the transmission defining a transmission ratio between a first speed of the output and a second speed of the input; a first sensor measuring the first speed and producing first speed data corresponding thereto; a second sensor measuring the second speed and producing second speed data corresponding thereto; a third sensor measuring a power demand of the apparatus and producing power demand data corresponding thereto; a ratio set point controller receiving the first and second speed data and the power demand data, the ratio set point controller calculating an available power of the source and a stability level of the system as a function of the first speed data and the power demand data, determining a desired source speed value for the first speed as a function of the power demand, calculating a desired ratio value for the transmission ratio as a function of the desired source speed value, and determining a desired rate of change for the transmission ratio as a function of the stability level of the system; a ratio controller interfacing the ratio set point controller to the transmission, the ratio controller actuating the transmission to change the transmission ratio to the desired ratio value following the desired rate of change; and a source speed controller receiving the second speed data from the second sensor and changing the first speed until the second speed data corresponds to the desired apparatus speed value. - View Dependent Claims (2, 3, 4, 5, 15, 16, 17)
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6. A system for transforming a variable output of a variable source if mechanical power into an input having a desired speed value for an apparatus, the system comprising:
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a transmission receiving the variable output and producing the input, the transmission having a variable ratio between a first speed of the output and a second speed of the input; at least one sensor producing first speed data corresponding to the first speed, second speed data corresponding to a power demand of the apparatus; a first controller receiving the first speed data, the second speed data and the power demand data, calculating an available power and a desired transmission ratio value based on the first speed data and the power demand data, classifying the system in one of at least first and second categories based on a first comparison of the first speed with a set range including the desired speed value and a second comparison of the available power with at least one threshold value, instructing the transmission to bring the variable ratio to the desired transmission ratio value rapidly when the system is in the first category, and instructing the transmission to bring the variable ratio to the desired transmission value progressively when the system is in the second category; and a second controller receiving the second speed data and sending a speed correction signal to the source of mechanical power to change the first speed until the second speed data corresponds to the desired speed value. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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18. A method for controlling a variable transmission transforming a variable output of a variable source of mechanical power into an input having a desired speed value for an apparatus, the method comprising the steps of:
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obtaining a first speed of the variable output, a second speed of the input, and a power demand of the apparatus; calculating (1) an available power based on the first speed and the power demand, (2) a stability level of the input of the apparatus based on the first speed and the available power, (3) a desired ratio of the transmission based on the power demand, and (4) a desired rate of ratio change based on the stability level; instructing the transmission to change to the desired ratio at the desired rate of ratio change; and varying the first speed until the second speed is substantially equal to the desired speed value. - View Dependent Claims (19, 20)
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21. A toroidal transmission comprising:
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first and second toroidal disks rotated by an input shaft; a third toroidal disk located between the first and second toroidal disk and rotating an output shaft; a plurality of first frictional rollers frictionally engaged to a toroidal cavity race of the first disk and a first toroidal cavity race of the third disk, each of the first frictional rollers being rotatable to transfer rotary power between the second and third disks; a plurality of second frictional rollers frictionally engaged to a toroidal cavity race of the second disk and a second toroidal cavity race of the third disk, each of the second frictional rollers being rotatable to transfer rotary power between the first and third disks; first means for retaining the first frictional rollers at a same first selective angle with respect to the third disk, the first means being actuable to change the first selective angle; second means for retaining the second frictional rollers at a same second selective angle with respect to the third disk, the second means being actuable to change the second selective angle; and third means for connecting the first and second means such that the first selective angle is substantially equal to the second selective angle and for actuating the first and second means together to obtain a selected value for the first and second selective angles, the selected value corresponding to at least one of a desired ratio of the transmission and a desired rate of ratio change of the transmission, the third means actuating the first and second means upon reception of a control signal.
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22. A multi-stage continuously variable transmission, comprising:
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a) a first transmission stage, including; i) a first pair of races defining therebetween a first toroidal cavity; ii) a first set of rollers in said first toroidal cavity to transfer rotary motion between said first pair of races; b) a second transmission stage, including; i) a second pair of races defining therebetween a second toroidal cavity; iii) a second set of rollers in said second toroidal cavity to transfer rotary motion between said second pair of races; c) a mechanical ratio control linkage interconnecting the rollers of said first set and of said second set, said mechanical ratio control linkage when displaced inducing a simultaneous change of the spatial position of the rollers of said first set and of said second set in said first and second toroidal cavities, respectively, thereby producing a coordinated transmission ratio change in said first and second stages. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A multi-stage continuously variable transmission, comprising:
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a) a first transmission stage, including; i) a first pair of races defining therebetween a first toroidal cavity; ii) a first set of rollers in said first toroidal cavity to transfer rotary motion between said first pair of races; b) a second transmission stage, including; i) a second pair of races defining therebetween a second toroidal cavity; iii) a second set of rollers in said second toroidal cavity to transfer rotary motion between said second pair of races c) said first pair of races and said second pair of races being rotatable about a common axis; d) a ratio control device angularly movable about said common axis to induce a simultaneous change of the spatial position of the rollers of said first set and of said second set in said first and second toroidal cavities, respectively, thereby producing a coordinated transmission ratio change in said first and second stages. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A continuously variable transmission, comprising:
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a) a pair of races defining therebetween a toroidal cavity; b) a set of rollers in said toroidal cavity to transfer rotary motion between said pair of races; c) a support for supporting said set of rollers in said toroidal cavity, said rollers being mounted to said support via respective ball joints allowing each roller to; i) tilt about a first imaginary axis that intersects respective points of contact of the roller with the respective races; ii) tilt about a second imaginary axis that is perpendicular to said first imaginary axis and that produces a change in an angle between the roller and the respective races, thereby varying a ratio of the transmission. - View Dependent Claims (59, 60, 61, 62, 63, 64)
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65. A continuously variable transmission, comprising:
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a) a pair of races defining therebetween a toroidal cavity; b) a set of rollers in said toroidal cavity to transfer rotary motion between said pair of races; c) a mounting structure for supporting said set of rollers in said toroidal cavity, said mounting structure allowing each roller to; i) tilt about a first imaginary axis that intersects respective points of contact of the roller with the respective races; ii) tilt about a second imaginary axis that is perpendicular to said first imaginary axis and that produces a change in an angle between the roller and the respective races, thereby varying a ratio of the transmission; iii) lock the roller against a translational movement with respect to said pair of races. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73)
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74. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) first and second flywheels in the driveline, the continuously variable transmission being mounted in the driveline between the first and second flywheels; c) the first flywheel having a lower inertia than the second flywheel; d) the first flywheel being upstream the second flywheel with relation to a power flow direction in the driveline from the internal combustion engine to the electrical generator. - View Dependent Claims (75, 76, 77, 78, 79, 80)
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81. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic that selects a rate at which the ratio of the continuously variable transmission is to be progressively varied, wherein in use the ratio of the continuously variable transmission can be varied at different rates. - View Dependent Claims (82, 83, 84, 85)
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86. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio at a rate that is dependent on the rate at which the electrical power demand of the load varies.
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87. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic selects a rate at which the ratio of the continuously variable transmission is to be progressively varied among a range of rates.
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88. Electrical power generating arrangement, comprising:
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a) a driveline including an electrical generator for use in supplying electrical power to a load, a continuously variable transmission that has a variable ratio and an internal combustion engine, wherein the internal combustion engine drives the electrical generator via the continuously variable transmission; b) an electronic control for directing the continuously variable transmission to vary its ratio, the electronic control including logic to determine a target ratio that the continuously variable transmission is to acquire, the electronic control sending control signals to the continuously variable transmission to progressively change its ratio from a current ratio to the target ratio at a rate at which the ratio of the continuously variable transmission is to be progressively varied, wherein in use the ratio of the continuously variable transmission can be varied at different rates.
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Specification