Inline electromechanical variable transmission system
First Claim
1. A drive system for a vehicle, comprising:
- a first gear set including a first sun gear, a first ring gear, a first plurality of planetary gears coupling the first sun gear to the first ring gear, and a first carrier rotationally supporting the first plurality of planetary gears;
a second gear set including a second sun gear, a second ring gear, a second plurality of planetary gears coupling the second sun gear to the second ring gear, and a second carrier rotationally supporting the second plurality of planetary gears, wherein the first carrier is selectively coupled to the second carrier;
a connecting shaft coupling an engine to the first gear set;
a first electrical machine coupled to the first gear set;
a second electrical machine coupled to the second gear set;
an output shaft configured to transport power from the first electrical machine, the second electrical machine, and the engine to a tractive element of the vehicle;
a first clutch selectively rotationally coupling the first carrier to the output shaft when engaged; and
a second clutch selectively rotationally coupling the first carrier to the output shaft when engaged;
wherein the output shaft is aligned with the connecting shaft, the first electrical machine, and the second electrical machine to thereby form a straight-thru transmission arrangement, wherein the first clutch is configured to be engaged when the drive system is selectively reconfigured into a forward mode of operation, and wherein the second clutch is configured to be engaged when the drive system is selectively reconfigured into a reverse mode of operation.
1 Assignment
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Accused Products
Abstract
A drive system includes a first gear set and a second gear set, each having a sun gear, a ring gear, a plurality of planetary gears coupling the sun gear to the ring gear, and a carrier rotationally supporting the plurality of planetary gears; a connecting shaft coupling an engine to the first gear set; a first electrical machine coupled to the first gear set; a second electrical machine coupled to the second gear set; an output shaft configured to transport power from the first electrical machine, the second electrical machine, and the engine to a tractive element; and a clutch selectively rotationally coupling the first carrier to the output shaft when engaged. The output shaft is aligned with the connecting shaft, the first electrical machine, and the second electrical machine to thereby form a straight-thru transmission arrangement.
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Citations
13 Claims
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1. A drive system for a vehicle, comprising:
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a first gear set including a first sun gear, a first ring gear, a first plurality of planetary gears coupling the first sun gear to the first ring gear, and a first carrier rotationally supporting the first plurality of planetary gears; a second gear set including a second sun gear, a second ring gear, a second plurality of planetary gears coupling the second sun gear to the second ring gear, and a second carrier rotationally supporting the second plurality of planetary gears, wherein the first carrier is selectively coupled to the second carrier; a connecting shaft coupling an engine to the first gear set; a first electrical machine coupled to the first gear set; a second electrical machine coupled to the second gear set; an output shaft configured to transport power from the first electrical machine, the second electrical machine, and the engine to a tractive element of the vehicle; a first clutch selectively rotationally coupling the first carrier to the output shaft when engaged; and a second clutch selectively rotationally coupling the first carrier to the output shaft when engaged; wherein the output shaft is aligned with the connecting shaft, the first electrical machine, and the second electrical machine to thereby form a straight-thru transmission arrangement, wherein the first clutch is configured to be engaged when the drive system is selectively reconfigured into a forward mode of operation, and wherein the second clutch is configured to be engaged when the drive system is selectively reconfigured into a reverse mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A drive system for a vehicle, comprising:
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a first planetary gear set; a second planetary gear set selectively coupled to the first planetary gear set; an engine directly coupled to the first planetary gear set with a connecting shaft; a first electromagnetic device directly coupled to the first planetary gear set; a second electromagnetic device directly coupled to the second planetary gear set and selectively rotationally coupled to the engine; an output aligned with the first planetary gear set, the second planetary gear set, and the connecting shaft to thereby form a straight-thru transmission arrangement; an auxiliary shaft radially offset from the connecting shaft and the output, wherein the auxiliary shaft is rotationally coupled to the output and the second planetary gear set; and a clutch positioned to selectively rotationally couple the first planetary gear set to the auxiliary shaft when engaged. - View Dependent Claims (10, 11, 12, 13)
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Specification