Back to results
US 8,939,858 B2Granted
Electrically variable drive unit
AssigneeChrysler Group LLC
InventorsDumitru Puiu, Goro Tamai, Dale E Martin
Life of this patent
Estimating the term…
Abstract
An electrically variable drive unit having two electric motors is provided. The first electric motor is mounted along the same axis as an engine. The second electric motor is mounted along the same axis as a transmission output.
Claims17
A drive unit comprising,
- a transmission input shaft;
- an output shaft;
- a first electric motor coaxial with said transmission input shaft;
- a second electric motor coaxial with said output shaft;
- an input planetary gear set coupled to said first electric motor;
- an electric motor planetary gear set coupled to said second electric motor;
- and
- an output planetary gear set coupled to said output shaft;
- wherein said first electric motor and said input shaft are coupled to said second electric motor and said output shaft;
- wherein said input planetary gear set comprises:
- an input carrier coupled to said transmission input shaft,
- a plurality of input pinion gears rotatably mounted on said input carrier,
- an input sun gear meshed with said plurality of input pinion gears and coupled to said first electric motor, and
- an input ring gear meshed with said plurality of input pinion gears and coupled to an output chain driver gear;
- wherein said electric motor planetary gear set comprises:
- an electric motor carrier coupled to an output chain driven gear,
- a plurality of electric motor pinion gears rotatably mounted on said electric motor carrier,
- an electric motor sun gear meshed with said plurality of electric motor pinion gears and coupled to said second electric motor, and
- an electric motor ring gear meshed with said plurality of electric motor pinion gears and coupled to a drive unit housing;
- wherein said output planetary gear set comprises:
- an output sun gear coupled to said output chain driven gear and said electric motor carrier;
- an output carrier coupled to said output shaft;
- a plurality of output pinion gears rotatably mounted on said output carrier and meshed with said output sun gear;
- and
- an output ring gear meshed with said plurality of output pinion gears and coupled to said drive unit housing;
- and
- wherein said output chain driver gear and said output chain driven gear are coupled.
24 more elements
A drive unit comprising:
- a transmission input shaft;
- an output shaft;
- a first electric motor coaxial with said transmission input shaft;
- a second electric motor coaxial with said output shaft;
- an input planetary gear set having:
- an input carrier coupled to said transmission input shaft,
- a plurality of input pinion gears rotatably mounted on said input carrier,
- an input sun gear meshed with said plurality of input pinion gears and coupled to said first electric motor, and
- an input ring gear meshed with said plurality of input pinion gears and coupled to an output chain driver gear;
- an output planetary gear set having:
- an output carrier coupled to said output shaft,
- an output sun gear coupled to an output chain driven gear,
- a plurality of output pinion gears meshed with said output sun gear and rotatably mounted on said output carrier, and
- an output ring gear meshed with said plurality of output pinion gear and coupled to a drive unit housing;
- an output driver gear coupled to said second electric motor;
- and
- an output driven gear meshed with said output driver gear and coupled to said output carrier and said output shaft,
- wherein said output chain driver gear and said output chain driven gear are coupled by a chain or belt;
- and
- wherein said first electric motor and said input shaft are coupled to said second electric motor and said output shaft.
17 more elements
A hybrid transmission comprising:
- a transmission input shaft;
- an output shaft;
- a first electric motor coaxial with said transmission input shaft;
- a second electric motor coaxial with said output shaft;
- an input planetary gear set having:
- an input carrier coupled to said transmission input shaft,
- a plurality of input pinion gears rotatably mounted on said input carrier,
- an input sun gear meshed with said plurality of input pinion gears and coupled to said first electric motor, and
- an input ring gear meshed with said plurality of input pinion gears and coupled to an output chain driver gear;
- an electric motor planetary gear set having:
- an electric motor carrier coupled to an output chain driven gear,
- a plurality of electric motor pinion gears rotatably mounted on said electric motor carrier,
- an electric motor sun gear meshed with said plurality of electric motor pinion gears and coupled to said second electric motor, and
- an electric motor ring gear meshed with said plurality of electric motor pinion gears and coupled to a transmission housing;
- and
- an output planetary gear set having:
- an output sun gear coupled to said output chain driven gear and said electric motor carrier;
- an output carrier coupled to said output shaft,
- a plurality of output pinion gears rotatably mounted on said output carrier and meshed with said output sun gear, and
- an output ring gear meshed with said plurality of output pinion gears,
- wherein said output chain driver gear is coupled to said output chain driven gear.
18 more elements
Dependencies are inferred from the claim text.