Transmission clutch braking control system
AssigneeDeere & Company
InventorsKyle K. McKinzie, Clayton G. Janasek
Life of this patent
Estimating the term…
Abstract
A control system operates a power train of a work vehicle. The system includes a transmission arrangement which transfers power from an engine to an output shaft of the vehicle to drive the vehicle in a first or second direction according to at least one forward or reverse modes. The arrangement includes a forward directional clutch and a reverse directional clutch, and a controller. The controller is configured to determine if one of the clutches is engaged; evaluate a speed of the engine; and provide a torque command to engage the other of the clutches to slow the speed of the engine when a shuttle shift is initiated, or when the speed of the engine exceeds a predetermined speed threshold.
Claims20
A control system for operating a power train of a work vehicle having an engine configured to generate power for an output shaft, the control system comprising:
- a transmission arrangement positioned operatively between the engine and the output shaft and configured to selectively transfer the power from the engine to drive the output shaft in a first direction according to at least one forward mode and in a second direction according to at least one reverse mode, the transmission arrangement including:
- a forward directional clutch configured for engagement when transferring the power in the at least one forward mode;
- and
- a reverse directional clutch configured for engagement when transferring the power in the at least one reverse mode;
- and
- a controller, having a processor and memory architecture, configured to:
- determine whether a shuttle shift has been initiated;
- determine if one of the forward directional clutch and the reverse directional clutch is engaged;
- and
- automatically provide, based on the determination that the shuttle shift has been initiated, a torque command to prime or engage, at least partially, the other of the forward directional clutch and the reverse directional clutch.
A work vehicle comprising:
- an engine;
- at least one continuously variable power source (CVP);
- an output shaft;
- a transmission arrangement positioned operatively between the output shaft and the engine and the at least one CVP such that the output shaft selectively receives power from one or both of the engine and the at least one CVP to drive the output shaft in a first direction according to at least one forward mode and in a second direction according to at least one reverse mode, the transmission arrangement including:
- a forward directional clutch configured for engagement when transferring the power in the at least one forward mode;
- and
- a reverse directional clutch configured for engagement when transferring the power in the at least one reverse mode;
- an operator input lever coupled to the transmission arrangement and configured to initiate a shuttle shift;
- a lever sensor associated with the operator input lever and configured to generate a shuttle shift signal;
- and
- a controller operatively coupled to the operator input lever and the transmission arrangement, the controller, having a processor and memory architecture, configured to:
- determine, based on receipt of the shuttle shift signal, that the shuttle shift has been initiated;
- determine if one of the forward directional clutch and the reverse directional clutch is engaged;
- and
- automatically provide, based on the determination that the shuttle shift has been initiated, a torque command to prime or engage, at least in part, the other of the forward directional clutch and the reverse directional clutch.
Dependencies are inferred from the claim text.