Multi-speed transmission with an integrated electric motor
First Claim
Patent Images
1. A multiple speed transmission for a motor vehicle comprising:
- an input member and an output member;
an electric motor coupled to the input 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 a first set of planet gears and a second set of planet pears 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; and
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.
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Abstract
A multiple speed transmission for a motor vehicle includes an input member connected to an electric motor, an output member, four planetary gear assemblies, each with first, second, and third members, and a plurality of torque transmitting devices, such as, brakes and clutches. 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.
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Citations
18 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; an electric motor coupled to the input 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 a first set of planet gears and a second set of planet pears 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; and 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A multiple speed transmission for a motor vehicle comprising:
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an input member and an output member; an electric motor coupled to the input member; a flywheel selectably connectable to the electric motor and the input member, the flywheel receiving a driving torque from an engine of the motor vehicle; 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 a set 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; and 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. - View Dependent Claims (13, 14, 15, 16)
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17. A multiple speed transmission for a motor vehicle comprising:
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an input member and an output member; an electric motor coupled to the input 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 a set 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 first connection between the ring gear of the first planetary gear assembly and the ring gear of the second planetary gear assembly; a second connection between the planet gear carrier of the first planetary gear assembly and the planet gear carrier of the second planetary gear assembly; a third connection between the planet gear carrier of the second planetary gear assembly and the sun gear of the third planetary gear assembly; a fourth connection between the planet gear carrier of the third planetary gear assembly and the ring gear of the fourth planetary gear assembly; and a fifth connection between the ring gear of the third planetary gear assembly and the planet gear carrier of the fourth planetary gear assembly. - View Dependent Claims (18)
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Specification