Multi-speed transmission with integrated electric motor
First Claim
Patent Images
1. A multiple speed transmission for a motor vehicle comprising:
- an input member and an output member;
a first planetary gear assembly with a sun gear, a ring gear, and a planet gear carrier that supports a set of planet gears;
a second planetary gear assembly with a sun gear coupled to the input member, a ring gear coupled to the ring gear of the first planetary gear assembly, and a planet gear carrier that supports two sets of planet gears and is coupled to the planet gear carrier of the first planetary gear assembly;
a third planetary gear with a sun gear coupled to the planet gear carrier of the second planetary gear assembly, a ring gear, and a planet gear carrier that supports a set of planet gears;
a fourth planetary gear assembly with a sun gear, a ring gear coupled to the planet gear carrier of the third planetary gear assembly, and a planet gear carrier that supports a set of planet gears and is coupled to and drives the output member and to the ring gear of the third planetary gear assembly;
an electric motor; and
a switching device that selectively couples the electric motor to the input member and selectively couples the electric motor to the sun gear of the fourth planetary gear assembly.
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Abstract
A multiple speed transmission for a motor vehicle includes an input member, an output member, four planetary gear assemblies, each with first, second, and third members, a plurality of torque transmitting devices, an electric motor, and a switching device that selectively couples the electric motor to the input member and selectively couples the electric motor to one of the members of one of the planetary gear assemblies. The electric motor can be employed for regenerative braking. Further, the electric motor can be employed to launch and drive the motor vehicle with each of the gear ratios of the multi-speed transmission.
94 Citations
19 Claims
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1. A multiple speed transmission for a motor vehicle comprising:
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an input member and an output member; a first planetary gear assembly with a sun gear, a ring gear, and a planet gear carrier that supports a set of planet gears; a second planetary gear assembly with a sun gear coupled to the input member, a ring gear coupled to the ring gear of the first planetary gear assembly, and a planet gear carrier that supports two sets of planet gears and is coupled to the planet gear carrier of the first planetary gear assembly; a third planetary gear with a sun gear coupled to the planet gear carrier of the second planetary gear assembly, a ring gear, and a planet gear carrier that supports a set of planet gears; a fourth planetary gear assembly with a sun gear, a ring gear coupled to the planet gear carrier of the third planetary gear assembly, and a planet gear carrier that supports a set of planet gears and is coupled to and drives the output member and to the ring gear of the third planetary gear assembly; an electric motor; and a switching device that selectively couples the electric motor to the input member and selectively couples the electric motor to the sun gear of the fourth planetary gear assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A multiple speed transmission for a motor vehicle comprising:
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an input member and an output member; a first planetary gear assembly with a sun gear, a ring gear, and a planet gear carrier that supports a set of planet gears; a second planetary gear assembly with a sun gear coupled to the input member, a ring gear coupled to the ring gear of the first planetary gear assembly, and a planet gear carrier that supports two sets of planet gears and is coupled to the planet gear carrier of the first planetary gear assembly; a third planetary gear with a sun gear coupled to the planet gear carrier of the second planetary gear assembly, a ring gear, and a planet gear carrier that supports a set of planet gears; a fourth planetary gear assembly with a sun gear, a ring gear coupled to the planet gear carrier of the third planetary gear assembly, and a planet gear carrier that supports a set of planet gears and is coupled to and drives the output member and to the ring gear of the third planetary gear assembly; a plurality of torque-transmitting mechanisms that are selectively engageable to establish various forward speed ratios and at least one reverse speed ratio between the input member and the output member, wherein the plurality of torque-transmitting mechanism includes a first clutch and a second clutch, and wherein the first clutch selectively couples the input member with the planet gear carrier of the third planetary gear assembly and the second clutch of selectively couples the input member with the sun gear of the fourth planetary gear assembly; an electric motor; and a switching device that selectively couples the electric motor to the input member and selectively couples the electric motor to the sun gear of the fourth planetary gear assembly. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A multiple speed transmission for a motor vehicle comprising:
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an input member and an output member; a first planetary gear assembly with a sun gear, a ring gear, and a planet gear carrier that supports a set of planet gears; a second planetary gear assembly with a sun gear coupled to the input member, a ring gear coupled to the ring gear of the first planetary gear assembly with a first interconnecting member, and a planet gear carrier that supports two sets of planet gears and is coupled to the planet gear carrier of the first planetary gear assembly with a second interconnecting member; a third planetary gear with a sun gear coupled to the planet gear carrier of the second planetary gear assembly with a third interconnecting member, a ring gear, and a planet gear carrier that supports a set of planet gears; a fourth planetary gear assembly with a sun gear, a ring gear coupled to the planet gear carrier of the third planetary gear assembly with a fourth interconnecting member, and a planet gear carrier that supports a set of planet gears and is coupled to and drives the output member and to the ring gear of the third planetary gear assembly with a fifth interconnecting member; an electric motor; and a switching device that selectively couples the electric motor to the input member and selectively couples the electric motor to the sun gear of the fourth planetary gear assembly.
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Specification