IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0973594
(2007-10-09)
|
등록번호 |
US-RE43259
(2012-03-20)
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발명자
/ 주소 |
- Janson, David A.
- Baldwin, Reid A.
|
출원인 / 주소 |
- Ford Global Technologies, LLC
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
▼
A multiple speed transmission for an automotive vehicle includes an input and an output, a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably
A multiple speed transmission for an automotive vehicle includes an input and an output, a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions. A forward clutch releasably connects the carrier of the second gear unit and the carrier of the third gear unit. A second clutch releasably connects the carrier of the first gear unit to the ring gear of the second gear unit. A third clutch releasably connects the ring gear of the third gear unit to the carrier of the second gear unit. First brake releasably holds the carrier of the third gear unit against rotation.
대표청구항
▼
1. A multiple speed transmission for an automotive vehicle having a power source, comprising: an input for carrying torque between the power source and a planetary gear system;an output;a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun ge
1. A multiple speed transmission for an automotive vehicle having a power source, comprising: an input for carrying torque between the power source and a planetary gear system;an output;a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions;the input being connected to the sun gear of the second gear unit, the output being connected to the ring gear of the third gear unit, the sun gear of the first gear unit being held against rotation, the ring gear of the first gear unit and the carrier of the second gear unit being connected mutually, and the ring gear of the second gear unit and the sun gear of the third gear unit being connected mutually,a first clutch for releasably connecting the input and the carrier of the first gear unit;a second clutch for releasably connecting the carrier of the second gear unit and the carrier of the third gear unit;a third clutch for releasably connecting the carrier of the first gear unit to the ring gear of the second gear unit;a fourth clutch for releasably connecting the ring gear of the third gear unit to the carrier of the second gear unit;first brake for releasably holding the carrier of the third gear unit against rotation; anda second brake for releasably holding the sun gear of the third gear unit against rotation. 2. The transmission of claim 1 further comprising: a hydrokinetic torque converter having an impeller driveably connected to the power source; anda turbine hydrokinetically coupled to the impeller and driveably connected to the input. 3. The transmission of claim 1 further comprising: a transfer case driveably connected to the output, for transmitting power continually to a first set of vehicle wheels and for transmitting power selectively to a second set of vehicle wheels. 4. A multiple speed transmission for an automotive vehicle having a power source, comprising: an input for carrying torque between the power source and a planetary gear system;an output;a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions;the input being connected to the sun gear of the second gear unit, the output being connected to the ring gear of the third gear unit, the sun gear of the first gear unit being held against rotation, the ring gear of the first gear unit and the carrier of the second gear unit being connected mutually, and the ring gear of the second gear unit and the sun gear of the third gear unit being connected mutually;a forward clutch for releasably connecting the carrier of the second gear unit and the carrier of the third gear unit;second clutch for releasably connecting the carrier of the first gear unit to the ring gear of the second gear unit;a third clutch for releasably connecting the ring gear of the third gear unit to the carrier of the second gear unit; andfirst brake for releasably holding the carrier of the third gear unit against rotation. 5. The transmission of claim 4 further comprising: a fourth clutch for releasably connecting the input and the carrier of the first gear unit. 6. The transmission of claim 4 further comprising: a second brake for releasably holding the sun gear of the third gear unit against rotation. 7. The transmission of claim 4 further comprising: a hydrokinetic torque converter having an impeller driveably connected to the power source; anda turbine hydrokinetically coupled to the impeller and driveably connected to the input. 8. The transmission of claim 4 further comprising: a transfer case driveably connected to the output, for transmitting power continually to a first set of vehicle wheels and for transmitting power selectively to a second set of vehicle wheels. 9. A powertrain for an automotive vehicle, comprising: a power source;a multiple speed transmission comprising:an input for carrying torque between the power source and a planetary gear system;an output;a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions;the input being connected to the sun gear of the second gear unit, the output being connected to the ring gear of the third gear unit, the sun gear of the first gear unit being held against rotation, the ring gear of the first gear unit and the carrier of the second gear unit being connected mutually, and the ring gear of the second gear unit and the sun gear of the third gear unit being connected mutually;a clutch for releasably connecting the carrier of the second gear unit and the carrier of the third gear unit;a second clutch for releasably connecting the carrier of the first gear unit to the ring gear of the second gear unit;a third clutch for releasably connecting the ring gear of the third gear unit to the carrier of the second gear unit;first brake for releasably holding the carrier of the third gear unit against rotation; anda second brake for releasably holding the sun gear of the third gear unit against rotation. 10. The powertrain of claim 9 further comprising: a fourth clutch for releasably connecting the input and the carrier of the first gear unit. 11. The powertrain of claim 9, further comprising: a transfer case driveably connected to the output, for transmitting power continually to a first set of vehicle wheels and for transmitting power selectively to a second set of vehicle wheels. 12. The transmission of claim 9 further comprising: a hydrokinetic torque converter having an impeller driveably connected to the power source; anda turbine hydrokinetically coupled to the impeller and driveably connected to the input. 13. The transmission of claim 9 further comprising: a transfer case driveably connected to the output, for transmitting power continually to a first set of vehicle wheels and for transmitting power selectively to a second set of vehicle wheels. 14. A powertrain for an automotive vehicle, comprising: a power source;a transmission including a first input driveably connected to the power source, a first output, and epicyclic gearing located in a torque path between the first input and the first output, the epicyclic gearing producing multiple forward gears, a reverse gear and a low range gear having a torque ratio that is greater than a torque ratio of a lowest gear of the forward gears, wherein the transmission automatically produces gear shifts among the forward gears, and the transmission produces the low range gear only in response to manual selection of low range gear operation of the transmission; anda transfer case including a second input driveably connected to the first output and a second output continually driveably connected to a first set of vehicle wheels and selectively driveably connected to a second set of vehicle wheels, the transfer case providing no low-range torque ratio. 15. The powertrain of claim 14, wherein the transfer case produces only one ratio of a speed of the second input to a speed of the second output. 16. The powertrain of claim 14, wherein the transfer case produces only one speed ratio, the magnitude of said speed ratio being 1.0. 17. The powertrain of claim 14, wherein the low range gear has a torque ratio whose magnitude is about double the torque ratio of the lowest gear of the forward gears. 18. The powertrain of claim 14, wherein the transmission shifts automatically among at least four forward gears. 19. The powertrain of claim 14, wherein the transmission shifts automatically among five forward gears. 20. The powertrain of claim 14, wherein the transmission produces the low range gear in response to manual selection of low-range operation and without stopping the vehicle. 21. The powertrain of claim 14, wherein the transmission discontinues operation in the low range gear without stopping the vehicle. 22. The powertrain of claim 14, further comprising: a hydrokinetic torque converter having an impeller driveably connected to the power source; anda turbine hydrokinetically coupled to the impeller and driveably connected to the first input. 23. The powertrain of claim 14, wherein the low range gear has a torque ratio whose magnitude is equal to or greater than 5.0.
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