Systems and method for an electric powertrain
Systems and a method are provided for a transmission system. In one example, a multi-speed transmission includes an input shaft driven by two parallel electric motors, the input shaft comprising a first gear and a second gear, a first clutch shaft comprising a first clutch engaged with the first gear, a second clutch shaft comprising a second clutch engaged with the second gear, a fourth clutch shaft comprising a fourth clutch engaged with the second clutch, the fourth clutch shaft further comprising a fourth clutch shaft first gear engaged with a first clutch shaft gear arranged on the first clutch shaft, and a third clutch arranged on the input shaft, the third clutch engaged with a second clutch shaft gear.
1 . A system for a multi-speed transmission, comprising:
an input shaft comprising an input gear driven by output gears of two electric motors, a first gear on the input shaft meshed with a first clutch, and a second gear on the input shaft meshed with a second clutch;
a first shaft comprising the first clutch and a first clutch shaft gear;
a second shaft comprising the second clutch, a second clutch shaft first gear, and a second clutch shaft second gear, wherein the second clutch shaft second gear is meshed with a third clutch arranged on the input shaft;
a fourth shaft comprising a fourth clutch, a fourth clutch shaft first gear, a fourth clutch shaft second gear, and a fourth clutch shaft third gear, wherein the fourth clutch shaft first gear is meshed with the first clutch shaft gear, the fourth clutch shaft second gear is meshed with the second clutch shaft first gear, and the fourth clutch is meshed with the second clutch; and
an output gear on an output shaft, the output gear meshed with the fourth clutch shaft third gear; wherein
the input shaft, the first shaft, the second shaft, the fourth shaft, and the output shaft are parallel to an axis.
2 . The system of claim 1 , wherein gears of the first shaft, the second shaft, the input shaft, and the fourth shaft are angled less than 90 degrees to the axis.
3 . The system of claim 1 , wherein only output shafts of the two electric motors and the output shaft extend outside of a transmission casing, wherein the output shafts of the two electric motors are parallel to the axis.
4 . The system of claim 1 , wherein the fourth clutch is arranged between the fourth clutch shaft first gear and the fourth clutch shaft second gear.
5 . The system of claim 1 , wherein the multi-speed transmission is a four-speed transmission.