A control apparatus for a vehicle that includes: drive wheels; an engine; a flywheel damper connected to the engine; at least one inertial body provided between the flywheel damper and the drive wheels; and a clutch for connecting and disconnecting between the flywheel damper and the at least one inertial body. In a process of reduction of a rotational speed of the engine for stopping the engine, the control apparatus keeps the clutch engaged until the rotational speed has passed through a first resonance speed range, and causes the clutch to be released before the rotational speed reaches a second resonance speed range. The first resonance speed range is a range of the rotational speed in which resonance is generated with the clutch being released. The second resonance speed range is a range of the rotational speed in which the resonance is generated with the clutch being engaged.

A controller for a hybrid system is provided. A clutch is disposed between a crankshaft and a drive shaft of an electric motor. An engine-side rotating body rotates integrally with the crankshaft. A motor-side rotating body rotates integrally with the drive shaft. The controller performs balance control. In the balance control, the controller causes the engine-side rotating body and the motor-side rotating body to rotate relative to each other by bringing the clutch into the slipping state. Thereafter, the controller switches the clutch to the engaged state such that the position of the center of gravity of the engine-side rotating body and the position of the center of gravity of the motor-side rotating body are farther from each other in the circumferential direction than before bringing the clutch into the slipping state.

Systems and methods for operating a vehicle that includes an engine and an electric machine are described. In one example, an actual total number of transmission gear downshifts are counted to determine whether or not a transmission clutch characterization is immature. The transmission clutch characterization may be adjusted if it is determined to be immature.

A controller for a hybrid system is provided. A clutch is disposed between a crankshaft and a drive shaft of an electric motor. An engine-side rotating body rotates integrally with the crankshaft. A motor-side rotating body rotates integrally with the drive shaft. The controller performs balance control. In the balance control, the controller causes the engine-side rotating body and the motor-side rotating body to rotate relative to each other by bringing the clutch into the slipping state. Thereafter, the controller switches the clutch to the engaged state such that the position of the center of gravity of the engine-side rotating body and the position of the center of gravity of the motor-side rotating body are farther from each other in the circumferential direction than before bringing the clutch into the slipping state.

A drive system of a hybrid vehicle including an internal combustion engine, a first motor-generator, a power transmission path, a power division mechanism, a second motor-generator, a one-way clutch, a mode change mechanism, and an electronic control unit having a microprocessor and memory. The microprocessor is configured to control the first motor-generator so as to reduce a reaction force acting on the first motor-generator at a time at which a state of the one-way clutch changes from an unlocked state to a locked state, when a drive mode is changed from an EV mode to a HV mode through a start mode by the mode change mechanism.

A method for operating a drivetrain of a motor vehicle comprising an engageable and disengageable four-wheel drive and at least two intermeshing gears, in which the four-wheel drive is switched off by the opening of at least one clutch of the drivetrain, wherein a change of engagement of the gears resulting from the switching off is actively braked by an electric machine of the drivetrain.

A control system for a hybrid vehicle configured to smoothly engage an engagement device while reducing a collision noise of the engagement device. The control system is configured to apply torque to a set of teeth on one half of the engagement device to shift a phase of the set of teeth in the event of teeth interference. After the completion of engagement of the engagement device, the control system further applies torque to the set of teeth on one half of the engagement device to reduce backlash between the set of teeth on one half of the engagement device and a set of teeth on the other half of the engagement device.

In the present invention, when an engine of a hybrid vehicle is in a cooled state, a control device 70 thereof performs control so as to disengage an engine clutch 14 configured from a wet multi-disc clutch and supply electrical power to a motor generator 21 from a high-voltage battery 24 to rotationally drive the motor generator 21 in order to agitate clutch oil 86 in the engine clutch 14 and raise the temperature thereof.

A drive system for at least one axle of a motor vehicle can be controlled, wherein the drive system has at least one electrical machine as drive unit, a drive shaft which is driven by the drive unit, a first output shaft and optionally a second output shaft and also a first clutch which connects the drive shaft to the first output shaft and optionally a second clutch which connects the drive shaft to the second output shaft, and furthermore a control unit for controlling the drive unit and the clutches, wherein the first output shaft and the optional second output shaft are arranged on a common axle.

A control apparatus of a hybrid leaning vehicle includes: a travel mode request section that requests one travel mode selected from a plurality of travel modes including a first travel mode in which an engine is operated with a clutch disengaged and a second travel mode in which the engine is operated with the clutch engaged; and a travel mode setting section. When the travel mode request section requests the second travel mode during travel in the first travel mode, the travel mode setting section, upon determining that a shock accepting condition is satisfied, sets the second travel mode as the travel mode to be executed and, upon determining that the shock accepting condition is not satisfied, prohibits the second travel mode from being set as the travel mode to be executed.