A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission Input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission Input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission Input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission Input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

A vehicle in which a shift lever of a Shift-by-Wire (SBW) type is used, the vehicle may include an inputter configured to receive pressing force of an acceleration pedal of the vehicle, a shift command to a P-stage of the shift lever, and gradient information related to a road on which the vehicle drives; a controller configured to: when the pressing force of the acceleration pedal of the vehicle is generated and the shift command to the P-stage is input to the controller, determine a gradient load torque and an acceleration torque of the vehicle, and limit a driver's requested torque based on the determined gradient load torque and the determined acceleration torque; and a driving device connected to the controller and configured to shift the shift lever to the P-stage when the driver's requested torque is limited.

A vehicle in which a shift lever of a Shift-by-Wire (SBW) type is used, the vehicle may include an inputter configured to receive pressing force of an acceleration pedal of the vehicle, a shift command to a P-stage of the shift lever, and gradient information related to a road on which the vehicle drives; a controller configured to: when the pressing force of the acceleration pedal of the vehicle is generated and the shift command to the P-stage is input to the controller, determine a gradient load torque and an acceleration torque of the vehicle, and limit a driver's requested torque based on the determined gradient load torque and the determined acceleration torque; and a driving device connected to the controller and configured to shift the shift lever to the P-stage when the driver's requested torque is limited.

A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

A hydrostatic transmission system includes a fluid-driven motor and an integrated pump assembly connected to the fluid-driven motor to provide fluid to operate the fluid-driven motor. The integrated pump assembly includes a pump with at least one fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The hydrostatic transmission system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to exclusively adjust at least one of a flow and a pressure in the hydrostatic transmission system to an operational set point.

A hydrostatic transmission system includes a fluid-driven motor and an integrated pump assembly connected to the fluid-driven motor to provide fluid to operate the fluid-driven motor. The integrated pump assembly includes a pump with at least one fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The hydrostatic transmission system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to exclusively adjust at least one of a flow and a pressure in the hydrostatic transmission system to an operational set point.

A vehicle in which a shift lever of a Shift-by-Wire (SBW) type is used, the vehicle may include an inputter configured to receive pressing force of an acceleration pedal of the vehicle, a shift command to a P-stage of the shift lever, and gradient information related to a road on which the vehicle drives; a controller configured to: when the pressing force of the acceleration pedal of the vehicle is generated and the shift command to the P-stage is input to the controller, determine a gradient load torque and an acceleration torque of the vehicle, and limit a driver's requested torque based on the determined gradient load torque and the determined acceleration torque; and a driving device connected to the controller and configured to shift the shift lever to the P-stage when the driver's requested torque is limited.

A vehicle in which a shift lever of a Shift-by-Wire (SBW) type is used, the vehicle may include an inputter configured to receive pressing force of an acceleration pedal of the vehicle, a shift command to a P-stage of the shift lever, and gradient information related to a road on which the vehicle drives; a controller configured to: when the pressing force of the acceleration pedal of the vehicle is generated and the shift command to the P-stage is input to the controller, determine a gradient load torque and an acceleration torque of the vehicle, and limit a driver's requested torque based on the determined gradient load torque and the determined acceleration torque; and a driving device connected to the controller and configured to shift the shift lever to the P-stage when the driver's requested torque is limited.