Inline electromechanical variable transmission system
First Claim
1. A drive system for a vehicle, comprising:
- a first planetary device;
a second planetary device directly coupled to the first planetary device;
an engine directly coupled to the first planetary device with a connecting shaft, wherein the first planetary device, the second planetary device, and the connecting shaft are radially aligned;
a first electromagnetic device at least selectively coupled to the first planetary device, wherein the first electromagnetic device includes a first shaft;
a second electromagnetic device directly coupled to the second planetary device, wherein the second electromagnetic device includes a second shaft, wherein the first shaft and the second shaft are radially aligned with the first planetary device, the second planetary device, and the connecting shaft, and wherein the connecting shaft extends through the second electromagnetic device and through the second planetary device to the first planetary device;
an output shaft coupled to the first planetary device, wherein the output shaft is radially aligned with the first planetary device, the second planetary device, and the connecting shaft to thereby form a straight-thru transmission arrangement; and
a clutch positioned to selectively rotationally couple the second shaft to the connecting shaft, wherein the second electromagnetic device is rotationally engaged with the engine when the clutch is engaged.
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Accused Products
Abstract
A drive system includes a first planetary device at least selectively coupled to a first electromagnetic device, a second planetary device coupled to a second electromagnetic device and directly coupled to the first planetary device, an engine directly coupled to the first planetary device with a connecting shaft, and an output shaft coupled to the first planetary device. The first and second electromagnetic devices include a first shaft and a second shaft, respectively. The connecting shaft extends through the second electromagnetic device and through the second planetary device to the first planetary device. The first shaft, the second shaft, the first planetary device, the second planetary device, the connecting shaft, and the output shaft are radially aligned, forming a straight-thru transmission arrangement.
417 Citations
19 Claims
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1. A drive system for a vehicle, comprising:
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a first planetary device; a second planetary device directly coupled to the first planetary device; an engine directly coupled to the first planetary device with a connecting shaft, wherein the first planetary device, the second planetary device, and the connecting shaft are radially aligned; a first electromagnetic device at least selectively coupled to the first planetary device, wherein the first electromagnetic device includes a first shaft; a second electromagnetic device directly coupled to the second planetary device, wherein the second electromagnetic device includes a second shaft, wherein the first shaft and the second shaft are radially aligned with the first planetary device, the second planetary device, and the connecting shaft, and wherein the connecting shaft extends through the second electromagnetic device and through the second planetary device to the first planetary device; an output shaft coupled to the first planetary device, wherein the output shaft is radially aligned with the first planetary device, the second planetary device, and the connecting shaft to thereby form a straight-thru transmission arrangement; and a clutch positioned to selectively rotationally couple the second shaft to the connecting shaft, wherein the second electromagnetic device is rotationally engaged with the engine when the clutch is engaged. - 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 device including a first rotatable portion, a second rotatable portion, at least one connecting member coupling the first rotatable portion to the second rotatable portion, and a first carrier rotationally supporting the at least one connecting member; a second planetary device including a sun gear, a ring gear, a plurality of planetary gears coupling the sun gear to the ring gear, and a second carrier rotationally supporting the plurality of planetary gears, wherein the first carrier is directly coupled to the second carrier; a connecting shaft coupling an engine to the first planetary device; a first electromagnetic device at least selectively coupled to the first planetary device; a second electromagnetic device coupled to the second planetary device; an output shaft directly coupled to the first carrier, wherein the output shaft is configured to transport power from the first electromagnetic device, the second electromagnetic device, and the engine to a tractive element of the vehicle; and wherein the output shaft is aligned with the connecting shaft, the first electromagnetic device, and the second electromagnetic device to thereby form a straight-thru transmission arrangement. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A vehicle, comprising:
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a multi-mode transmission including; a first planetary device and a second planetary device, the first planetary device including a carrier, wherein the carrier and the second planetary device are directly coupled; a first motor/generator at least selectively coupled to the first planetary device; a second motor/generator coupled to the second planetary device; and an output shaft directly coupled to the carrier of the first planetary device and configured to selectively receive rotational mechanical energy from the first motor/generator and the second motor/generator; an engine directly coupled to the first planetary device and selectively coupled to the second planetary device; and a drive axle coupled to the output shaft of the multi-mode transmission. - View Dependent Claims (17, 18, 19)
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Specification