US4592250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydromechanical transmission with split torque and regenerative torque flow paths
Assignee: Ford Motor Co
•
Filing: 1983-10-11
•
Granted: 1986-06-03
•
Expires: 2003-10-11
Abstract
Abstract A multiple speed ratio hydrokinetic transmission for a wheeled vehicle comprising a planetary gear set having two input torque flow paths and a hydrokinetic torque converter having an impeller element connected to one flow path and a turbine element connected to the other flow path; a friction lockup clutch which, under relatively high peed driving conditions, establishes a mechanical torque bypass path for engine torque in parallel with a torque flow path established by the hydrokinetic unit; and an overrunning coupling located between the friction clutch and the turbine element to adapt the transmission for a direct mechanical torque transfer from the vehicle engine to a driven member or a split torque path that is partly mechanical and partly hydrokinetic; provision being made during high speed ratio operation for a regenerative torque distribution between the input elements through the friction clutch and the overrunning coupling thereby providing improved driveline efficiency and improved driveability for the driveline with reduced harshness in ratio changes.
Inventors
- 👤 David B. Plasencia
- 👤 Stewart P. Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:07
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H47/085; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663; F16H41/00; F16H41/24; F16H2041/246; F16H2200/00; F16H2200/20; F16H2200/2002; F16H2200/2005; F16H2200/2079; F16H2200/2084
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A hydrokinetic torque converter mechanism for an automotive vehicle driveline adapted to deliver driving torque from a driving shaft to an output shaft; a compound planetary gear unit having two input elements, a reaction element, separate torque input shafts connected respectively to said input elements; said hydrokinetic unit comprising a bladed impeller and a bladed turbine, the impeller being connected to said driving shaft, said turbine being connected to one of said input shafts; a centrifugally operated clutch means for connecting a second input shaft to said driving shaft and an overrunning coupling between the output side of said centrifugally actuated clutch and said first input shaft.
Claim 2
Dependent Claim
107 words
A hydrokinetic torque converter mechanism for an automotive vehicle driveline adapted to deliver driving torque from a driving shaft to an output shaft; a compound planetary gear unit having two input elements, a reaction element, separate torque input shafts connected respectively to said input elements; said hydrokinetic unit comprising a bladed impeller and a bladed turbine, the impeller being connected to said driving shaft, said turbine being connected to one of said input shafts; a centrifugally operated clutch means for connecting a second input shaft to said driving shaft and an overrunning coupling between the output side of said centrifugally actuated clutch and said first input shaft.
Claim 3
Dependent Claim
122 words
The combination as set forth in claim 1 wherein: said compound planetary gear unit comprises a ring gear, first and second sun gears, a carrier, a first set of pinions carried by said carrier in meshing engagement with the first sun gear and said ring gear, a second set of pinions engaged with said second sun gear and with said first set of pinions; first clutch means for connecting selectively said first input shaft to said second sun gear, second clutch means for selectively connecting said second input shaft to said ring gear; and first and second brake means for anchoring respectively the first sun gear and said ring gear to effect a second gear drive mode and reverse drive mode respectively.
Claim 4
Dependent Claim
65 words
The combination as set forth in claim 2 wherein said first clutch means for connecting said first input shaft to said second sun gear includes a selectively engageable friction clutch and an overrunning coupling arranged in parallel relationship, said friction clutch effecting coasting torque delivery therethrough and said overrunning coupling effecting torque delivery from said driving shaft to said sun gear during first gear drive.
Claim 5
Dependent Claim
55 words
The combination as set forth in claim 1 wherein said transmission comprising final drive gearing situated between said hydrokinetic unit and said compound planetary gear unit, said final drive gearing comprising a final drive input gear connected to said output shaft and a final drive output gear adapted to be connected to vehicle traction wheels.
Claim 6
Dependent Claim
55 words
The combination as set forth in claim 2 wherein said transmission comprising final drive gearing situated between said hydrokinetic unit and said compound planetary gear unit, said final drive gearing comprising a final drive input gear connected to said output shaft and a final drive output gear adapted to be connected to vehicle traction wheels.
Claim 7
Dependent Claim
55 words
The combination as set forth in claim 3 wherein said transmission comprising final drive gearing situated between said hydrokinetic unit and said compound planetary gear unit, said final drive gearing comprising a final drive input gear connected to said output shaft and a final drive output gear adapted to be connected to vehicle traction wheels.
References Cited (Backward Citations)
US3024668A
Cited
US2889715A
Cited
US2932220A
Cited
US3106107A
Cited
US3314307A
Cited
US3355966A
Cited
US3359827A
Cited
US3398604A
Cited
US3772939A
Cited
DE2406315A1
Cited
US4014223A
Cited
US4049094A
Cited
US4037691A
Cited
US4063623A
Cited
US4083440A
Cited
US4140208A
Cited
US4124106A
Cited
US4117918A
Cited
US4140210A
Cited
US4304107A
Cited
US4157136A
Cited
US4226309A
Cited
US4289044A
Cited
US4232534A
Cited
US4226123A
Cited
US4224837A
Cited
DE2917448A1
Cited
US4383596A
Cited
US4417484A
Cited
US4305493A
Cited
US4398436A
Cited
US4331044A
Cited
US4413536A
Cited
US4454786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |