Transmission concept for dual yoke hydrostatic units
View Patent ↗A power split transmission concept for two or three or four modes is provided with two variable hydrostatic units, an engine mechanically connected to the row 1 sun of a planetary gear set with at least two planetary rows, the second row of the planetary rows being connected to a row 2 sun, whereby both hydrostatic units stay connected with the same planetary element through all modes, one hydrostatic unit being connected to the sun of row 2 and the other hydrostatic unit being connected to a ring gear of planetary row 2.
1. A power split transmission concept for two or three or four modes, the concept comprising:
two variable hydrostatic units;
an engine mechanically connected to a row 1 sun of a planetary gear set with at least two planetary rows
planets of row 1 , 2 and 3 mechanically connected or as one piece,
whereby both hydrostatic units stay connected with the same planetary element through all modes,
one hydrostatic unit being connected to a sun of row 2
the other hydrostatic unit being connected to a ring gear of planetary row 2 .
2. A power split transmission according to claim 1 , where a mode 1 output is from the sun of row 2 of the planetary and a mode 2 output is from a carrier of the planetary.
3. A power split transmission according to claim 2 , where a mode 3 output is from a row 3 sun.
4. A power split transmission according claim 1 , where a planetary reverser is used at a transmission output shaft for full reverse speed.
5. A power split transmission according claim 1 , whereby a planetary reverser is used at a transmission input shaft for full reverse speed.
6. A power split transmission concept for two or three or four modes, the concept comprising:
two variable hydrostatic units;
an engine mechanically connected to a row 1 sun of a planetary gear set with three planetary rows;
planets of row 1 , 2 and 3 mechanically connected or as one piece,
whereby both hydrostatic units stay connected with the same planetary element through all modes,
one hydrostatic unit being connected to a sun of row 2 ,
the other hydrostatic unit being connected to a ring gear of planetary row 2 ,
whereby a mode 1 output is from a ring gear of the planetary, a mode output 2 and a mode 4 output is from a row 3 sun and a mode 3 output is from a carrier of the planetary.
7. A power split transmission according claim 6 , whereby a mode 1 planetary output is used for reverse via idler gear.
8. A power split transmission according claim 6 , whereby a mode 2 planetary output is used for reverse via idler gear.
9. A power split transmission according claim 6 , whereby a planetary reverser is used at a transmission input shaft for full reverse speed.