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US 12,209,657 B2Granted
Vehicle system with hydromechanical transmission and power management strategy
AssigneeDana Italia S.R.L.
InventorsLorenzo Dalla Palma, Fabio Gunsch, Alessandro Dilisa
Life of this patent
Estimating the term…
Abstract
Methods and systems for a hydromechanical transmission. In one example, a vehicle system includes a hydromechanical transmission with a power-take off (PTO) that is designed to rotationally couple to an implement. The vehicle system further includes an engine coupled to the hydromechanical transmission and a power-management control unit configured to, during a drive or coast condition, cause the power-management control unit to: determine a net available power for the hydromechanical transmission and manage a power flow between the hydromechanical transmission, a drive axle, and the implement based on the net available power.
Claims16
A transmission system, comprising:
- a hydromechanical transmission configured to rotationally couple to a motive power source;
- a power-take off (PTO) configured to rotationally couple to an implement;
- and
- a power-management control unit in electronic communication with a vehicle control unit (VCU), an engine control unit (ECU), and an implements control unit (ICU) and including instructions that when executed, during a drive condition or a coast condition, cause the power-management control unit to:
- receive power data from the VCU, the ECU, and the ICU;
- determine a net available power for the hydromechanical transmission based on the power data;
- and
- manage a power flow between the hydromechanical transmission, a drive axle, and the implement based on the net available power, a transmission power limit, an implement power limit, and a priority value;
- wherein the priority value is a portion of the net available power to which the hydromechanical transmission is constrained;
- wherein the transmission power limit and the implement power limit are adjusted based on a transmission traction request condition, an implement request condition, and a mixed transmission traction request and implement request condition;
- and
- wherein during the mixed transmission traction request and implement request condition, the implement power limit is reduced based on the priority value and increased based on a proportional integral (PI) controller term.
9 more elements
A method for managing power in a vehicle system, comprising:
- at a power-management control unit, receiving power data from one or more of an engine control unit (ECU), a vehicle control unit (VCU), and an implement control unit (ICU);
- determining a net available power for a hydromechanical transmission based on the power data;
- and
- managing a power flow between the hydromechanical transmission, a drive axle, and an implement based on the net available power, a transmission power limit, an implement power limit, and a priority value;
- wherein the priority value is a portion of the net available power to which the hydromechanical transmission is constrained;
- wherein the transmission power limit and the implement power limit are adjusted based on a transmission traction request condition, an implement request condition, and a mixed transmission traction request and implement request condition;
- and
- wherein during the transmission traction request condition the implement power limit is reduced based on the priority value.
5 more elements
A transmission system, comprising:
- a hydromechanical variable transmission (HVT) configured to rotationally couple to an internal combustion engine;
- a power-take off (PTO) configured to rotationally couple to an implement;
- and
- a power-management control unit in electronic communication with a vehicle control unit (VCU), an engine control unit (ECU), and an implement control unit (ICU) and including instructions that when executed, during a drive condition or a coast condition, cause the power-management control unit to:
- receive power data from the VCU, the ECU, and the ICU;
- determine a net available power for the HVT based on the power data;
- and
- manage a power flow between the HVT, a drive axle, and the implement based on the net available power, a transmission power limit, an implement power limit, and a priority value;
- wherein the priority value is a portion of the net available power to which the HVT is constrained;
- wherein the transmission power limit and the implement power limit are adjusted based on a transmission traction request condition, an implement request condition, and a mixed transmission traction request and implement request condition;
- and
- wherein during the transmission traction request condition the implement power limit is reduced based on the priority value.
9 more elements
Dependencies are inferred from the claim text.