EP0141605A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Continuously variable power transmission
Assignee: Motors Liquidation Co
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Filing: 1984-10-22
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Granted: —
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Expires: 2004-10-22
Abstract
Abstract A continuously variable power transmission with wide ratio coverage has a variable ratio belt drive (30, 98, 100) in series with a fixed ratio drive (138, 140, 156) which is selectively connectible between the input and output shafts (24, and 94, 96). A pair of selectively engageable clutches (54 and 162) co-operate with the belt drive to provide two continuously variable speed ratio ranges. A transition clutch (64) maintains power flow between the input and output shafts during shifting from one range to the other. The belt drive is controlled between the maximum and minimum drive ratios in each speed range. The belt ratio is held constant while the transition clutch is engaged.
Inventors
- 👤 Erkki Antero Koivunen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 01:15
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
259 words
A continuously variable power transmission in which variable-ratio pulley and belt means (30,98, 100) is operatively connectible between input means (24) and output means (94,96) and includes a first adjustable. pulley (30), a second adjustable pulley (100) and a flexible drive member (98) interconnecting the pulleys (30 and 100), characterized in that first selectively engageable clutch means (54) is operable to connect the first adjustable pulley (30) to the input means (24) during a first variable speed ratio range, second selectively engageable clutch means (162) is operable to connect the second adjustable pulley (100) to the output means (94,96) during the first variable ratio range, and transition clutch means (64) is selectively engageable to connect the input means (24) to the output means (94,96) during a change from the first variable ratio range to a second variable ratio range, the first clutch means (54) being shiftable for selectively connecting the first pulley (30) to the output means (94,96) whilst the transition clutch means (64) is an engaged condition, for operation of the second variable ratio range, the second clutch means (162) being shiftable for selectively connecting the second pulley (100) to the input means (24) whilst the transition clutch means (64) is in an engaged condition, for operation of the second variable ratio range, and the variable-ratio pulley and belt means (30,98,100) being controllable to provide a change in ratio in the pulley drive from an underdrive to an overdrive during the first variable ratio range and from an overdrive to an underdrive during the second variable ratio range.
Claim 2
Dependent Claim
259 words
A continuously variable power transmission in which variable-ratio pulley and belt means (30,98, 100) is operatively connectible between input means (24) and output means (94,96) and includes a first adjustable. pulley (30), a second adjustable pulley (100) and a flexible drive member (98) interconnecting the pulleys (30 and 100), characterized in that first selectively engageable clutch means (54) is operable to connect the first adjustable pulley (30) to the input means (24) during a first variable speed ratio range, second selectively engageable clutch means (162) is operable to connect the second adjustable pulley (100) to the output means (94,96) during the first variable ratio range, and transition clutch means (64) is selectively engageable to connect the input means (24) to the output means (94,96) during a change from the first variable ratio range to a second variable ratio range, the first clutch means (54) being shiftable for selectively connecting the first pulley (30) to the output means (94,96) whilst the transition clutch means (64) is an engaged condition, for operation of the second variable ratio range, the second clutch means (162) being shiftable for selectively connecting the second pulley (100) to the input means (24) whilst the transition clutch means (64) is in an engaged condition, for operation of the second variable ratio range, and the variable-ratio pulley and belt means (30,98,100) being controllable to provide a change in ratio in the pulley drive from an underdrive to an overdrive during the first variable ratio range and from an overdrive to an underdrive during the second variable ratio range.
Claim 3
Dependent Claim
88 words
A continuously variable power transmission according to claim 1, characterised in that fixed-ratio chain drive means (138,140,156) is connectible to the second adjustable pulley (100) by selectively engageable friction means (148), and the second clutch means (162) is selectively engageable for connecting the fixed-ratio chain drive means (138,140,156) to the output means (94,96) during the first variable ratio range, and for selectively connecting the fixed-ratio chain drive means (138,140,156) to the input means (24) during engagement of the transition clutch means (64) during the second variable ratio range.
Claim 4
Dependent Claim
99 words
A continuously variable power transmission according to claim 1 or 2, characterised in that forward-reverse drive selection means (148,130) is operatively connectible to the second adjustable pulley (100), and that the variable-ratio pulley means (30,98, 100) is controllable to provide a change in ratio from the first pulley means (30) to the second pulley means (100) from an underdrive to an overdrive during the first variable ratio range and to provide a change in ratio from the second pulley means (100) to the first pulley means (30) between an underdrive and an overdrive during the second variable ratio range.
References Cited (Backward Citations)
CH243182A
Cited
DE2621682A1
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EP0004412A1
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GB2025545A
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DE2948194A1
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FR2520826A1
Cited
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