A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

In a hybrid electric vehicle and a touchpoint learning method therefor, while a motor is driven, an engagement oil pressure of an engine clutch is adjusted step-by-step, to learn a touchpoint, thereby reducing touchpoint learning time and improving learning accuracy. The touchpoint learning method may include: determining whether a touchpoint learning entry condition previously set is satisfied or not; controlling a first motor connected to one end of an engine clutch to be in a stopped state when the learning entry condition is satisfied; maintaining a second motor connected to the other end of the engine clutch at a preset speed; changing an engagement oil pressure of the engine clutch step-by-step; and learning a touchpoint of the engine clutch based on a torque change of the second motor.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

A hybrid vehicle system includes: an engine that is capable of outputting a torque to be transmitted to a driving wheel; a first motor generator that is provided in a coupled manner to the engine and that is capable of outputting a torque to be transmitted to the driving wheel; a transmission that converts a torque output from one or both of the engine and the first motor generator at a predetermined transmission gear ratio; a transmission clutch that is capable of switching on and off power transmission between the first motor generator and the transmission; a second motor generator that is capable of outputting a torque to be transmitted to the driving wheel in a state where the transmission clutch is disengaged; and an oil pump that is coupled to a motor shaft of the first motor generator and that is driven by rotation of the motor shaft.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

Provided is a control device for a vehicle including a continuously variable transmission. The control device includes a lock-up clutch, an oil pump, an electric motor, and a device control unit. The lock-up clutch is disposed in a torque converter coupled to the engine and switchable between an engaged state and a released state. The oil pump is driven by the engine and supplies a hydraulic oil to the continuously variable transmission. The electric motor is coupled to the engine and controlled to be in a powering state in which the engine is rotationally driven. The device control unit controls the lock-up clutch to put into the released state and controls the electric motor to put into the powering state if a discharge pressure of the oil pump falls below a threshold value at the time of a vehicle deceleration in which a fuel supply to the engine is cut off.

A control device that includes an electronic control unit that is configured to: detect an actual current value flowing through the solenoid valve; receive a current command value and the actual current value detected and generate a primary command voltage value while feeding back the current command value on the basis of the actual current value; calculate a dither command voltage value to cause a periodic voltage oscillation; filter the actual current value detected to remove a frequency corresponding to a period of the dither command voltage value and output the filtered actual current value; generate a secondary command voltage value by superimposing the dither command voltage value generated on the primary command voltage value generated; convert the secondary command voltage value generated into a PWM signal; and generate, on the basis of the PWM signal generated, an application voltage to be applied to the solenoid valve.

A control apparatus of a hybrid vehicle having an electric oil pump includes an engine clutch selectively engaging an engine and a drive motor; an automatic transmission changing a power generated from the engine by engagement and releasing of a friction element into a required torque depending on a speed; a hydraulic pressure sensor sensing an oil pressure supplied to the engine clutch; a temperature sensor sensing an oil temperature discharged from the electric oil pump; a hybrid control unit (HCU) controlling the electric oil pump to selectively engage the engine clutch depending on a driving state; and a transmission control unit (TCU) controlling the electric oil pump to supply transmission control pressure to the friction element. The electric oil pump includes an oil motor and a pump to supply the operating hydraulic pressure to the engine clutch and the friction element.

An agricultural vehicle has wheel groups, an engine group, a continuously variable transmission group connecting the engine group to the wheel groups and having a hydraulic device, user management elements for driving the agricultural vehicle and setting motion modes thereof, and vehicle management elements for detecting operating conditions of the agricultural vehicle by detecting speed of the agricultural vehicle, engine revolutions, gear ratio and hydraulic pressure value of the continuously variable transmission group. A management and command system, operatively connected to the user management elements, the vehicle management elements, the engine group and the continuously variable transmission group, commands the continuously variable transmission group in at least one driving operating configuration, in which a hydraulic action of the hydraulic device is commanded according to predefined steps, and at least one auxiliary operating configuration in which the hydraulic action of the hydraulic device is commanded according to a continuous course over time.

A control system for hybrid vehicles that ensures high motor power while limiting damage on a planetary gear unit is provided. In a planetary gear unit, a sun gear is connected to a first motor, a ring gear is connected to a second motor, and a carrier is connected to an engine. An operating mode of the hybrid vehicle can be selected from a hybrid mode, a single-motor mode, and a dual-motor mode. The control system is configured to shift the operating mode to the hybrid mode if an estimated temperature of the pinion gear is higher than a threshold temperature, and to the single-motor mode if the estimated temperature of the pinion gear is lower than a threshold temperature.