Electromechanical variable transmission
First Claim
1. A drive train for a vehicle, comprising:
- an engine having an output shaft;
a first gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear;
a second gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, wherein the planetary gears of both sets are rotatably supported by respective planetary gear carriers;
a first motor/generator coupled to the first gear set;
a second motor/generator coupled to the second gear set and electrically coupled to the first motor/generator;
a first clutch that selectively engages the output shaft of the engine with the second motor/generator; and
a second clutch and a third gear set that cooperate to selectively engage the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set.
2 Assignments
0 Petitions
Accused Products
Abstract
A drive train for a vehicle includes an engine having an output shaft, a first gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a second gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a first motor/generator coupled to the first gear set, a second motor/generator coupled to the second gear set and electrically coupled to the first motor/generator, a first clutch that selectively engages the output shaft of the engine with the second motor/generator, and a second clutch and a third gear set that cooperate to selectively engage the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set.
293 Citations
20 Claims
-
1. A drive train for a vehicle, comprising:
-
an engine having an output shaft; a first gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear; a second gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, wherein the planetary gears of both sets are rotatably supported by respective planetary gear carriers; a first motor/generator coupled to the first gear set; a second motor/generator coupled to the second gear set and electrically coupled to the first motor/generator; a first clutch that selectively engages the output shaft of the engine with the second motor/generator; and a second clutch and a third gear set that cooperate to selectively engage the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A drive train for a vehicle, comprising:
-
a first planetary gear set; a second planetary gear set directly coupled to the first planetary gear set; an output shaft selectively coupled to at least one of the first and the second planetary gear sets; an engine at least selectively rotationally engaged with the first planetary gear set; a first electromagnetic device directly coupled to the first planetary gear set; and a second electromagnetic device directly coupled to the second planetary gear set and selectively rotationally engaged with the engine. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A vehicle, comprising:
-
a dual-mode transmission comprising a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier; an engine coupled to the first gear set; a first motor/generator coupled to the first gear set; a second motor/generator coupled to the second gear set; and a drive axle coupled to the dual-mode transmission; wherein during a first mode of operation of the vehicle the second motor/generator is coupled to the drive axle and disengaged from the engine, and wherein during a second mode of operation of the vehicle the second motor/generator is selectively coupled to the engine. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification