Adjustable control of power take-off subsystem damping and system thereof
AssigneeAllison Transmission, Inc.
InventorsMichael B. Pociask, Jorge F. Briceno
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a method for controlling a power take-off assembly. The method includes providing a drive unit, a transmission having an output, a speed sensor, a controller including a memory unit and a processor, and the power take-off assembly including a clutch and a solenoid. The method also includes storing a first threshold in the memory unit, determining a current input speed of the drive unit with the speed sensor, and comparing the current input speed to the first threshold. The method further includes controlling an amount of hydraulic pressure supplied to the clutch and engaging the clutch.
Claims20
A method for controlling a power take-off assembly, comprising:
- providing a drive unit, a transmission including an output, a speed sensor, a controller including a memory unit and a processor, and the power take-off assembly including a clutch, a first solenoid and a second solenoid;
- storing a first threshold in the memory unit;
- determining a current input speed of the drive unit with the speed sensor;
- comparing the current input speed to the first threshold;
- controlling an amount of hydraulic pressure supplied to the clutch;
- and
- engaging the clutch by energizing one of the first solenoid or the second solenoid.
A vehicle, comprising:
- a drive unit for producing torque, the drive unit including an output;
- a transmission including an input, a first output, and a second output, wherein the input is coupled to the output of the drive unit;
- a controller including a memory unit and a processor, the controller electrically coupled to the transmission;
- and
- a power take-off assembly coupled to the second output, the power take-off assembly including a clutch and a solenoid electrically coupled to the controller;
- wherein, a set of instructions is stored in the memory unit of the controller, the set of instructions being executable by the processor to receive a current input speed of the drive unit, compare the current input speed to a first threshold, determine if the current input speed is less than the first threshold, fully energize or de-energize the solenoid, and operably control an amount of hydraulic pressure applied to the clutch.
Power take-off assembly, comprising:
- an input shaft configured to transfer torque to the power take-off assembly from a drive unit;
- an output shaft having a coupler on one end;
- a hydraulic clutch disposed between the input shaft and the output shaft, the hydraulic clutch having a fully engaged position, a partially engaged position, and a disengaged position;
- a first solenoid having an open state where the first solenoid is fluidly coupled to the hydraulic clutch and having a closed state where the first solenoid is not fluidly coupled to the hydraulic clutch;
- and
- a second solenoid having an open state where the second solenoid is fluidly coupled to the hydraulic clutch and having a closed state where the second solenoid is not fluidly coupled to the hydraulic clutch;
- wherein, when the hydraulic clutch is in the fully engaged position, the first solenoid is in the open state and the second solenoid is in the closed state.
Dependencies are inferred from the claim text.