Back to results
US 2009/0156351 A1Published application
Hybrid transmission
OwnerMarkus Brouwer, Benjamin Kaehler +1inventors
InventorsMarkus Brouwer, Benjamin Kaehler, Karl-Ernst Noreikat
Life of this patent
Estimating the term…
Abstract
In a hybrid transmission for a motor vehicle with three differential drive units (D1 to D3), two electric machines (E1, E2) and four shift elements (C1 to C4), the hybrid transmission (HG) includes a fifth shift element (C5) by which two transmission elements of the first differential drive unit (D1) can be coupled thereby achieving an improved operating efficiency and smaller continuous electric power requirements.
Claims6
A hybrid transmission for a motor vehicle comprising:
- a transmission input shaft (GE) drive-connected to an internal combustion engine, and a transmission output shaft (GA)
- three differential drive units (D1, D2, D3) arranged in the power path between the transmission input shaft (GE) and the transmission output shaft (GA)
- a first transmission element (outer hollow gear 3) of the differential drive unit (D1) being drive-connected to the transmission input shaft (GE)
- a second transmission element (planetary gear carrier 11) of the first differential drive unit (D1) being drive-connected to a first transmission element (planetary carrier 12) of the second differential drive unit (D2) and a first transmission element (sun gear 7) of the third differential drive unit (D3),
- a third transmission element (sun gear 1) of the first differential drive unit (D1) being drive-connected to a first electric machine (E1) and drive connectable to a second transmission element (outer hollow gear 3) of the second differential drive unit (D2) via a first shift element (C4),
- a third transmission element (sun gear 4) of the second differential being drive-connected to a second electric machine (E2) and drive-connectable to a second transmission element (planetary carrier 13) of the third differential unit (D3) by a second shift element (C2),
- a third transmission element (outer hollow gear 10) of the third differential drive unit (D3) drive-connected to the output shaft (GA),
- a third shifting element (C3) for connecting the second transmission element (outer hollow gear 6) of the second differential unit (D2) to a housing structure,
- a fourth shift element (C1) for connecting the second transmission element (planetary gear carrier 13) of the third differential drive unit (D3) to a housing structure, and
- a fifth shift element (C5) for interconnecting the two transmission elements of the first differential drive unit (D1).
7 more elements
Dependencies are inferred from the claim text.