Single input and single-output hybrid system
View Patent ↗A hybrid assembly having a single input and a single output is provided. The hybrid assembly may be operated in electronically variable, fixed gear, direct gear, and locked modes.
1. A hybrid drive train, comprising:
a hybrid assembly, comprising:
a planetary gear set, comprising:
a sun gear,
a carrier,
a plurality of planet gears rotatably affixed to said carrier and continuously meshed with said sun gear,
a ring gear continuously meshed with said plurality of planet gears;
a hybrid assembly input shaft coupled to said carrier;
a hybrid assembly output shaft coupled to said ring gear;
a first electric machine having the sun gear arranged to operate as a first electric machine rotor;
a second electric machine having the ring gear arranged to operate as a second electric machine rotor;
a brake clutch configured to selectively couple said first electric machine rotor to a housing of said hybrid assembly; and
a first clutch configured to selectively couple said ring gear to said carrier,
wherein said hybrid assembly is constructed to operate:
in a first electrically variable transmission mode where both said first clutch and said brake clutch are deactivated,
in a second fixed gear ratio mode where said first clutch is deactivated and said brake clutch is activated,
in a third direct gear ratio mode where said first clutch is activated and said brake clutch is deactivated, and
in a fourth locked mode where both said first clutch and said brake clutch are activated.
2. The hybrid drive train of claim 1 , wherein said first electric machine rotor is said sun gear and said second electric machine rotor is said ring gear.
3. The hybrid drive train of claim 1 , wherein said first electric machine rotor is equal in diameter to said second electric machine rotor.
4. The hybrid drive train of claim 1 , wherein said first electric machine rotor is larger in diameter than said second electric machine rotor.
5. The hybrid drive train of claim 1 , further comprising:
an engine coupled to said hybrid assembly input shaft; and
an automatic gearbox coupled to said hybrid assembly output shaft.
6. The hybrid drive train of claim 5 , wherein said automatic gearbox is coupled to a final drive and further comprising a bypass linkage selectively coupling said hybrid assembly output shaft directly to said final drive and selectively bypassing said automatic gearbox.