Abstract: A system and method for controlling a motor of an electric drivetrain having a multi-speed transmission with at least a first clutch and a second clutch. The system and method includes initiating a transmission shift requiring engagement of the first clutch, applying synchronizing torque commands to the motor based on an engagement parameter of the first clutch until the shift is complete, and applying non-shifting torque commands to the motor after the shift is complete.

Abstract: A control system for a machine having at least one control element is disclosed. The control system includes multiple input sensors in communication with the control element. The input sensor generates an input signal based on an input to the control element. The control system includes multiple actuating members to control operations of the machine. The control system includes a controller in communication with the input sensors and the actuating members. The controller receives the input signal from the input sensor and determines an imposed hysteresis level corresponding to the input signal based on a hysteresis input function. The controller is further configured to generate a hysteresis conditioned input signal based on the imposed hysteresis level.

Abstract: A control system for a machine having at least one control element is disclosed. The control system includes multiple input sensors in communication with the control element. The input sensor generates an input signal based on an input to the control element. The control system includes multiple actuating members to control operations of the machine. The control system includes a controller in communication with the input sensors and the actuating members. The controller receives the input signal from the input sensor and determines an imposed hysteresis level corresponding to the input signal based on a hysteresis input function. The controller is further configured to generate a hysteresis conditioned input signal based on the imposed hysteresis level.

Abstract: A system and method are provided for maintaining hydraulic steering for a machine during engine out or engine lugging conditions. The machine includes a torque-controlled transmission driven by an engine, the engine further being linked to a hydraulic steering pump that provides hydraulic power to a steering actuator. The machine may be, for example, a wheel loader or an off highway truck. The system and method include detecting an undesirable reduction of engine speed while the machine is travelling, and responsively reducing the transmission power to maintain the engine speed at a desired level to power the hydraulic steering pump. When the reduced requested transmission power reaches zero, a power reversal through the transmission is commanded to maintain the engine speed at the desired level to power the hydraulic steering pump.

Abstract: A system and method are provided for maintaining hydraulic steering for a machine during engine out or engine lugging conditions. The machine includes a torque-controlled transmission driven by an engine, the engine further being linked to a hydraulic steering pump that provides hydraulic power to a steering actuator. The machine may be, for example, a wheel loader or an off highway truck. The system and method include detecting an undesirable reduction of engine speed while the machine is travelling, and responsively reducing the transmission power to maintain the engine speed at a desired level to power the hydraulic steering pump. When the reduced requested transmission power reaches zero, a power reversal through the transmission is commanded to maintain the engine speed at the desired level to power the hydraulic steering pump.

Abstract: A method for dissipating power through a machine may include directing power into a power system of the machine. The method may further include controlling a parasitic load of the power system to increase dissipation of the power system, the controlling of the parasitic load being a function of a power dissipation limit of the power system.

Abstract: A calibration system for calibrating a transmission provides a calibrated clutch fill time for an oncoming clutch by activating a parking brake of a machine associated with the transmission and calibrating each clutch by setting a transmission characteristic parameter to an initial value, and then activating a clutch solenoid associated with the clutch. The transmission characteristic is periodically measured, and when the measured value of the transmission characteristic exceeds the initial value for a predetermined number of consecutive periods, the fill time for the clutch is set equal to the time elapsed during the total number of measurement periods minus one less than the predetermined number of consecutive periods.

Abstract: A hydraulic motor system for improved frequency response includes a hydraulic variator having a pump and a motor, wherein the pump includes a variable angle swash plate, and the system further includes an electric actuator for controlling an angle or torque of the swash plate, thereby controlling the motor output characteristics. The electric actuator for controlling the variable angle swash plate may comprise a linear electric motor, ball screw drive or a rotary electric motor. In an example, the rotary electric motor tilts the swash plate by applying a torque to the swash plate at a point away from its tilt axis. In a further example, the rotary electric motor tilts the swash plate via a worm drive or ball screw drive.

Abstract: A system for controlling a machine with a continuously variable transmission includes a first control device configured to produce a first signal based on a first operator input and a second control device configured to produce a second signal based on a second operator input. The system also includes a control system configured to receive the first and second signals from the first and second control devices and generate a raw torque value based on the first and second signals. The control system is also configured to determine an output torque value based on the raw torque value and transmit the output torque value to the transmission to control the transmission.

Abstract: An apparatus for a hybrid machine is disclosed. The apparatus includes a fluid pump operably connected to a condenser and a fluid path operably connected to the fluid pump. The fluid receives thermal energy from a first machine component and a second machine component. The first machine component has a static operating temperature equal to or lower than the second machine component.

Abstract: The present disclosure is directed toward a method for dissipating power through a machine. The method may include directing power into a power system of the machine. The method may further include controlling a parasitic load of the power system to increase dissipation of the power system, the controlling of the parasitic load being a function of a power dissipation limit of the power system.

Abstract: A hydraulic motor system for improved frequency response includes a hydraulic variator having a pump and a motor, wherein the pump includes a variable angle swash plate, and the system further includes an electric actuator for controlling an angle or torque of the swash plate, thereby controlling the motor output characteristics. The electric actuator for controlling the variable angle swash plate may comprise a linear electric motor, ball screw drive or a rotary electric motor. In an example, the rotary electric motor tilts the swash plate by applying a torque to the swash plate at a point away from its tilt axis. In a further example, the rotary electric motor tilts the swash plate via a worm drive or ball screw drive.

Abstract: A method is provided for controlling braking in a vehicle having a motor and a brake. The method includes sensing an actual operating parameter of the motor and receiving a desired operating parameter of the motor. The motor is controlled based on the actual operating parameter and the desired operating parameter of the motor. The brake is controlled based on the actual operating parameter and the desired operating parameter of the motor and an output from the motor control.

Abstract: A system for controlling a machine with a continuously variable transmission includes a first control device configured to produce a first signal based on a first operator input and a second control device configured to produce a second signal based on a second operator input. The system also includes a control system configured to receive the first and second signals from the first and second control devices and generate a raw torque value based on the first and second signals. The control system is also configured to determine an output torque value based on the raw torque value and transmit the output torque value to the transmission to control the transmission.