A charge control apparatus of a hybrid vehicle is provided. The apparatus adjusts charge of a hybrid vehicle based on a vehicle running state when entering a charge mode. The charge control apparatus includes an engine clutch that is disposed between an engine and a first motor to selectively connect the engine and the first motor and a battery that provides a voltage to the first motor. A data detection unit detects driving data for charging the battery and a vehicle controller generates an average speed for a predetermined time using a vehicle speed of the driving data. In addition, the controller sets a charge mode based on the average speed and charges the battery using the charge mode.

An apparatus and a method are provided for controlling a mode change of a hybrid electric vehicle that change a mode of the hybrid electric vehicle at an optimal reference point of mode change when a demand power of a driver is stably maintained to be greater than a predetermined level. The method includes calculating a demand power or a demand torque of a driver and determining whether the demand power or the demand torque is maintained to be equal to or greater than a first predetermined value for a first predetermined time. A mode change hysteresis line is raised when the demand power or the demand torque is maintained to be equal to or greater than the first predetermined value for the first predetermined time and then a mode change is executed based on the raised mode change hysteresis line.

The present disclosure provides a method for learning a kisspoint of an engine clutch in a hybrid vehicle, which performs kisspoint learning of an engine clutch while driving by learning hydraulic pressure at the time when motor torque varies by gradually increasing clutch hydraulic pressure in an open state of the engine clutch when a driving load of a vehicle is constant to increase a kisspoint learning frequency of the engine clutch and improve kisspoint accuracy.

A method for operating a drive train of a motor vehicle may include, for a starting process of an internal combustion engine, transferring the separating clutch from a disengaged condition into an engaged condition or a slip state such that the electric machine accelerates the internal combustion engine to a starting speed. The method may further include actuating a torque-transmitting element between the electric machine and the output shaft to enter a slip state. The method may also include increasing the torque of the electric machine to reliably reach and hold the slip state of the torque-transmitting element. Additionally, the method may include operating the electric machine as a generator or as a motor depending on an expected load direction of the drive train during the starting process to reliably reach and hold the torque-transmitting element in the slip state.

A driving mode control method and apparatus of a hybrid electric vehicle are provided. The driving mode control method includes decreasing a torque of an engine when a first driving mode in which both the engine and a first motor are driven is switched to a second driving mode driven by the first motor and applying a torque of a second motor. A clutch is then opened when a difference between the engine torque and the second motor torque is less than a first threshold torque.

A vehicle control device includes a controller configured to perform: ignition starting of an engine when a detected crank angle is within a first area in which the ignition starting of the engine may be performed with probability not smaller than a first predetermined value; and the ignition starting of the engine while increasing an engine speed by engaging a clutch to transmit torque of a drive wheel to a crankshaft when the crank angle is within a second area in which the ignition starting of the engine may be performed with probability not smaller than a second predetermined value smaller than the first predetermined value and smaller than the first predetermined value, the instruction is output based on a signal indicating that a braking unit is turned on, and a gear of a transmission is not in neutral.

The invention concerns a method for automatically controlling a motor vehicle (10) for switching from a “normal” mode to a “freewheel” mode, the vehicle (10) comprising an engine (12) capable of providing engine torque to drive wheels (14) via an automatically controlled clutch device (18) that comprises a drive shaft (15) and a driven shaft (16). A transition step (E1) is interposed chronologically between the “normal” mode and the “freewheel mode” during which the engine (12) is automatically controlled in such a way that the driven shaft (16) and the drive shaft (15) turn at the same speed without transmitting torque to the drive wheels (14).

A method of controlling the operating mode of a motor vehicle includes transitioning between driving and coasting modes and vice-versa automatically in response to a driver trigger. The method controls an engine of the motor vehicle to bring a driveline driven by the engine via an electronically controlled clutch into a lash state before engaging or disengaging the electronically controlled clutch thereby preventing driveline disturbances from being produced by the transition.

A power controller of a hybrid vehicle includes: a first drive motor that drives any one of a front wheel and a rear wheel of a vehicle; an engine that drives the one wheel or the corresponding other one of the front wheel and the rear wheel of the vehicle through a clutch; a generator that is driven by the engine; and a voltage transformer that steps down generated electric power supplied to the first drive motor and a battery from the generator. The power controller limits passing power of the voltage transformer according to the temperature of the voltage transformer, and connects the clutch when the passing power of the voltage transformer is limited.

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.