Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation is provided for a dual mass flywheel positioned in a vehicle driveline. The approaches may reduce driveline torque disturbances.

A method for active vibration control of a hybrid electric vehicle may include: selecting a reference angle signal based on position information of a motor or an engine; generating a reference angle based on information of the reference angle signal; setting up a period of fast Fourier transform (FFT) and analyzing the FFT signal; setting up a reference spectrum according to an engine speed and an engine load; extracting a vibration component from each frequency based on information of the reference spectrum; selecting and adding a removal object frequency from the vibration of each frequency and performing inverse FFT; determining a basic amplitude ratio according to the engine speed and the engine load and an adjustable rate according to the engine load; and performing active vibration control of each frequency based on the information of the basic amplitude ratio, the adjustable rate, and the engine torque.

A vehicle having a structure is provided. The system includes a cradle mounted to the structure at a first position and a second position, the second position being spaced apart from the first position. A rear drive module is provided having a housing, the housing coupled to the cradle between the first position and the second position, the housing coupled to the cradle in at least two locations. At least one linkage is operably coupled to the housing on a first end and to the structure on a second end.

An engine system for a vehicle may include an engine including a plurality of cylinders connected to a crankshaft, a Cylinder Deactivation (CDA) apparatus provided to at least one cylinder among the plurality of cylinders of the engine, a first flywheel mounted on the crankshaft, a second flywheel having a rotation center formed eccentrically with respect to the crankshaft by being disposed at a position corresponding to the cylinder including the CDA apparatus, and a clutch provided to the crankshaft to selectively transmit a torque of the crankshaft to the second flywheel during operation of the CDA apparatus.

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation is provided for a dual mass flywheel positioned in a vehicle driveline. The approaches may reduce driveline torque disturbances.

An engine starting system for hybrid vehicle is provided. The engine starting system is applied to a hybrid vehicle in which a friction clutch is disposed between an engine and a power distribution device. In order to reduce gear noise and vibrations, a second motor establishes a cancel torque to cancel a reaction torque acting on an axle when starting the engine. The engine starting system is configured to increase the torque of the second motor in a direction of a drive torque rotating the axle, when starting the engine while bringing the friction clutch into engagement in a slipping manner.

An engine stopping system for reducing electric consumption by interrupting power supply to a motor during disengagement of a clutch is provided. The engine stopping system is applied to a vehicle in which the clutch is interposed between an engine and a power distribution device. The engine stopping system is configured to interrupt power supply to the motor while bringing the clutch into disengagement, when an input speed N.sub.in falls below a threshold value , under conditions that the engine does not generate power during engagement of the clutch, and that the motor generates electricity utilizing an inertia torque of the engine while controlling an output torque of the motor to lower the engine speed.

an electronic control unit configured to i) while the engagement mechanism is changing from the engaged state to the released state, execute shaking control, ii) execute torque oscillation control, iii) determine whether to execute any one of releasing control and the torque oscillation control while the other one of the releasing control and the torque oscillation control is being executed, and iv) stop the shaking control when the electronic control unit determines to execute the releasing control and the torque oscillation control.