EP0378900A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Automatic planetary gear transmission
Assignee: Toyota Motor Corp
•
Filing: 1989-11-20
•
Granted: —
•
Expires: 2009-11-20
Abstract
Abstract A speed changing gear device in an automatic transmission for a motor vehicle, including a first and a second single-pinion type planetary gear unit (1, 2) and a third double-pinion planetary gear unit (3), which are coaxially disposed so as to provide different speed reduction ratios. The three gear units have respective first, second and third sun gears, respective first, second and at least one pair of planetary pinions, respective first, second and third ring gears, and respective first, second and third carriers. The first and third ring gears (1R, 3R) are fixed to each other for rotation as a unit, or connectable to each other by clutch means. The first sun gear (1S) and the second ring gear (2R) are fixed to each other or connectable by clutch means(K3). The second and third carriers (2C, 3C) are fixed to each other or connectable to each other by clutch means (K5). The second and third sun gears (2S, 3S) are fixed to leach other or connectable by clutch means.
Inventors
- 👤 Toshiyuki Asada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:15
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/666; F16H3/663; F16H2003/445; F16H2200/00; F16H2200/003; F16H2200/0047; F16H2200/0056; F16H2200/0082; F16H2200/0086; F16H2200/20; F16H2200/2002; F16H2200/201; F16H2200/203; F16H2200/2043; F16H2200/2046; F16H2200/2048
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
394 words
A speed changing gear device in an automatic transmission for a motor vehicle, including a first single-pinion type planetary gear unit having a first sun gear, a first planetary pinion meshing with the first sun gear, a first ring gear meshing with the first planetary pinion and a first carrier rotatably supporting the first planetary pinion, a second single-pinion type planetary gear unit having a second sun gear, a second planetary pinion meshing with the second sun gear, a second ring gear meshing with the second planetary pinion and a second carrier rotatably supporting the second planetary pinion, and a third double-pinion type planetary gear unit having a third sun gear, at least one pair of third planetary pinions which mesh with each other and one of which meshes with the third sun gear, a third ring gear meshing with the other of said at least one pair of third planetary pinions, and a third carrier rotatably supporting said at least one pair of third planetary pinions said first, second and third planetary gear units being disposed coaxially with each other in the order of description, for transmitting power from an input member to an output member, at a selected one of different speed reduction ratios, characterized in that: said first and third ring gears (1R, 2R) being associated with each other by one of fixing means for fixing said first and third ring gears to each other, and clutch means for selectively connecting said first and third ring gears to each other; said first sun gear (1S) and said second ring gear (1R) being associated with each other by one of fixing means for fixing said first sun gear and said second ring gear to each other, and clutch means (K3) for selectively connecting said first sun gear and said second ring gear to each other; said second and third carriers (2C, 3C) being associated with each other by one of fixing means for fixing said second and third carriers to each other, and clutch means (K5) for selectively connecting said second and third carriers to each other; and said second and third sun gears (2S, 3S) being associated with each other by one of fixing means for fixing said second and third sun gears to each other, and clutch means for selectively connecting said second and third sun gears to each other.
Claim 2
Dependent Claim
394 words
A speed changing gear device in an automatic transmission for a motor vehicle, including a first single-pinion type planetary gear unit having a first sun gear, a first planetary pinion meshing with the first sun gear, a first ring gear meshing with the first planetary pinion and a first carrier rotatably supporting the first planetary pinion, a second single-pinion type planetary gear unit having a second sun gear, a second planetary pinion meshing with the second sun gear, a second ring gear meshing with the second planetary pinion and a second carrier rotatably supporting the second planetary pinion, and a third double-pinion type planetary gear unit having a third sun gear, at least one pair of third planetary pinions which mesh with each other and one of which meshes with the third sun gear, a third ring gear meshing with the other of said at least one pair of third planetary pinions, and a third carrier rotatably supporting said at least one pair of third planetary pinions said first, second and third planetary gear units being disposed coaxially with each other in the order of description, for transmitting power from an input member to an output member, at a selected one of different speed reduction ratios, characterized in that: said first and third ring gears (1R, 2R) being associated with each other by one of fixing means for fixing said first and third ring gears to each other, and clutch means for selectively connecting said first and third ring gears to each other; said first sun gear (1S) and said second ring gear (1R) being associated with each other by one of fixing means for fixing said first sun gear and said second ring gear to each other, and clutch means (K3) for selectively connecting said first sun gear and said second ring gear to each other; said second and third carriers (2C, 3C) being associated with each other by one of fixing means for fixing said second and third carriers to each other, and clutch means (K5) for selectively connecting said second and third carriers to each other; and said second and third sun gears (2S, 3S) being associated with each other by one of fixing means for fixing said second and third sun gears to each other, and clutch means for selectively connecting said second and third sun gears to each other.
Claim 3
Dependent Claim
32 words
A speed changing gear device according to claim 1, characterized in that said first sun gear and said second ring gear (1S, 2R) are connectable to each other by clutch means (K3).
Claim 4
Dependent Claim
30 words
A speed changing gear device according to claim 2, characterized in that said first and third ring gears (1R, 3R) are fixed to each other for rotation as a unit.
Claim 5
Dependent Claim
29 words
A speed changing gear device according to claim 2, characterized in that said second and third carriers (2C, 3C) are fixed to each other for rotation as a unit.
Claim 6
Dependent Claim
30 words
A speed changing gear device according to claim 2, characterized in that said second and third sun gears (2S, 3S) are fixed to each other for rotation as a unit.
Claim 7
Dependent Claim
66 words
A speed changing gear device according to claim 2, characterized in that three clutches (K1, K2, K3; K1, K3, K6; K3, K4, K6) including a clutch as said clutch means (K3) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of three members selected from among said three clutches and said three brakes.
Claim 8
Dependent Claim
65 words
A speed changing gear device according to claim 2, characterized in that four clutches (K1, K2, K3, K4; K1, K3, K4, K6) including a clutch as said clutch means (K3) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of three members selected from among said four clutches and said three brakes.
Claim 9
Dependent Claim
59 words
A speed changing gear device according to claim 2, characterized in that two clutches (K3, K6) including a clutch as said clutch means (K3) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of two members selected from among said two clutches and said three brakes.
Claim 10
Dependent Claim
32 words
A speed changing gear device according to claim 2, characterized in that said input member (4) and said first sun gear (1S) are fixed to each other for rotation as a unit.
Claim 11
Dependent Claim
31 words
A speed changing gear device according to claim 2, characterized in that said output member (5) and said second carrier (2C) are fixed to each other for rotation as a unit.
Claim 12
Dependent Claim
28 words
A speed changing gear device according to claim 1, characterized in that said second and third carriers (2C, 3C) are connectable to each other by clutch means (K5).
Claim 13
Dependent Claim
30 words
A speed changing gear device according to claim 11, characterized in that said first and third ring gears (1R, 3R) are fixed to each other for rotation as a unit.
Claim 14
Dependent Claim
33 words
A speed changing gear device according to claim 11, characterized in that said first sun gear and said second ring gear (1S, 2R) are fixed to each other for rotation as a unit.
Claim 15
Dependent Claim
30 words
A speed changing gear device according to claim 11, characterized in that said second and third sun gears (2S, 3S) are fixed to each other for rotation as a unit.
Claim 16
Dependent Claim
66 words
A speed changing gear device according to claim 11, characterized in that three clutches (K1, K2, K5; K1, K5, K6; K4, K5, K6) including a clutch as said clutch means (K5) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of three members selected from among said three clutches and said three brakes.
Claim 17
Dependent Claim
65 words
A speed changing gear device according to claim 11, characterized in that four clutches (K1, K2, K4, K5; K1, K4, K5, K6) including a clutch as said clutch means (K5) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of three members selected from among said four clutches and said three brakes.
Claim 18
Dependent Claim
59 words
A speed changing gear device according to claim 11, characterized in that two clutches (k5, K6) including a clutch as said clutch means (K5) are provided in combination with three brakes (B1, B2, B3), each of said different speed reduction ratios being provided by concurrent engagement of two members selected from among said two clutches and said three brakes.
Claim 19
Dependent Claim
32 words
A speed changing gear device according to claim 11, characterized in that said input member (4) and said first sun gear (1S) are fixed to each other for rotation as a unit.
Claim 20
Dependent Claim
31 words
A speed changing gear device according to claim 11, characterized in that said output member (5) and said third carrier (3C) are fixed to each other for rotation as a unit.
Claim 21
Dependent Claim
263 words
A speed changing gear device in an automatic transmission for a motor vehicle, including a single-pinion type planetary gear unit having a first sun gear, a first planetary pinion meshing with the first sun gear, a first ring gear meshing with the first planetary pinion and a first carrier rotatably supporting the first planetary pinion, and a Ravigneaux type planetary gear assembly having a second sun gear, a second planetary pinion meshing with the second sun gear, a third planetary pinion meshing with the second planetary pinion, a second ring gear meshing with the second planetary pinion, a third ring gear meshing with the third planetary pinion, and a second carrier rotatably supporting the second planetary pinion, said single-pinion type planetary gear unit and said Ravigneaux type planetary gear assembly being disposed coaxially with each other in the order of description, for transmitting power from an input member to an output member, at a selected one of different speed reduction ratios, characterized in that: said first and third ring gears (1R, 3R) being associated with each other by one of fixing means for fixing said first and third ring gears to each other, and clutch means for selectively connecting said first and third ring gears to each other; and said first sun gear (1S) and said second ring gear (2R) being associated with each other by one of fixing means for fixing said first sun gear and said second ring gear to each other, and clutch means (K3) for selectively connecting said first sun gear and said second ring gear to each other.
Claim 22
Dependent Claim
263 words
A speed changing gear device in an automatic transmission for a motor vehicle, including a single-pinion type planetary gear unit having a first sun gear, a first planetary pinion meshing with the first sun gear, a first ring gear meshing with the first planetary pinion and a first carrier rotatably supporting the first planetary pinion, and a Ravigneaux type planetary gear assembly having a second sun gear, a second planetary pinion meshing with the second sun gear, a third planetary pinion meshing with the second planetary pinion, a second ring gear meshing with the second planetary pinion, a third ring gear meshing with the third planetary pinion, and a second carrier rotatably supporting the second planetary pinion, said single-pinion type planetary gear unit and said Ravigneaux type planetary gear assembly being disposed coaxially with each other in the order of description, for transmitting power from an input member to an output member, at a selected one of different speed reduction ratios, characterized in that: said first and third ring gears (1R, 3R) being associated with each other by one of fixing means for fixing said first and third ring gears to each other, and clutch means for selectively connecting said first and third ring gears to each other; and said first sun gear (1S) and said second ring gear (2R) being associated with each other by one of fixing means for fixing said first sun gear and said second ring gear to each other, and clutch means (K3) for selectively connecting said first sun gear and said second ring gear to each other.
Claim 23
Dependent Claim
32 words
A speed changing gear device according to claim 20, characterized in that said first sun gear (1S) and said second ring gear (2R) are connectable to each other by clutch means (K3).
Claim 24
Dependent Claim
30 words
A speed changing gear device according to claim 21 characterized in that said first and third ring gears (1R, 3R) are fixed to each other for rotation as a unit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.