Split Power Hydro-Mechanical Transmission with Power Circulation
OwnerWieslaw Julian Oledzkiinventor
Life of this patent
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Abstract
Split power hydro-mechanical transmission includes an input shaft and an output shaft, a torque converter and a planetary gear set, wherein the input shaft is connected to the turbine rotor and the ring gear or the sun gear, the pump rotor is connected to the sun gear or the ring gear, and the output shaft is connected to the planet carrier. This arrangement introduces strong positive feedback between the pump rotor and the turbine rotor, which results in large maximum torque ratio and large rate of growth of torque ratio, as well as large range of (naturally automatic) torque ratio variation.
Claims12
A hydro-mechanical transmission with power circulation includes at least:
- a first body;
- an input shaft supported rotatably in said first body;
- an output shaft supported rotatably in said first body;
- a hydrodynamic torque converter having at least:
- a second body filled with a hydraulic fluid, a turbine rotor, a pump rotor, and a stator secured against rotation relative the body;
- and a planetary gear set having a sun gear, a ring gear, a first number of planet gears, and a planet gears carrier;
- wherein the input shaft is connected directly to the turbine rotor;
- wherein at any moment t the total torque Tr1(t) on the transmission input shaft, the torque TS(t) supplied to the input shaft by the engine, and the torque Tt(t) on the turbine rotor generated by the flow of the hydraulic fluid satisfy the following equation:
- Tr1(t)=TS(t)+Tt(t).
A hydro-mechanical transmission with power circulation includes at least:
- a first body;
- an input shaft supported rotatably in said first body;
- a first output shaft supported rotatably in said first body;
- a hydrodynamic torque converter having at least:
- a second body filled with a hydraulic fluid, a turbine rotor, a pump rotor, and a stator secured against rotation relative the second body;
- a planetary gear set having a sun gear, a ring gear, a first number of planet gears, and a planet gears carrier;
- and a speed reduction gear, having at least a first rotary member, a second rotary member, and a second output shaft;
- wherein the input shaft is connected to the first rotary member of the speed reduction gear, and the second output shaft of the speed reduction gear is connected directly to the second rotary member of the speed reduction gear and to the turbine rotor;
- wherein at any moment t the total torque Tr1(t) on the second output shaft, the torque TS(t) supplied to the input shaft by the engine, and the torque Tt(t) on the turbine rotor generated by the flow of the hydraulic fluid satisfy the following equation:
- T
- r
-
- 1
-
- (
- t
- )
- =
- 1
- ρ
-
- η
-
- T
-
- S
-
- (
- t
- )
- +
- T
- t
-
- (
- t
- )
- ,
- wherein ρ is the kinematic transmission ratio of the speed reduction gear, and η is the efficiency of the speed reduction gear.
Dependencies are inferred from the claim text.