Control system for power transmission unit of vehicle

A control system for a power transmission unit of a vehicle transmitting power outputted from a prime mover, comprising:

• a resonance detecting/predicting device which detects or predicts a generation of a resonance of the power transmission unit resulting from the power transmission;
• and
• a resonance dampening control device, which performs a plurality of resonance dampening controls which dampens the resonance detected or predicted by the resonance detecting/predicting device in order of priority,
• wherein the power transmission unit comprises a clutch mechanism which changes a transmission torque capacity thereof, and
• the resonance dampening control device includes a device which performs a control of reducing the torque capacity of the clutch mechanism as a priority resonance dampening control by releasing the clutch mechanism if the clutch mechanism is fully engaged.

A control method for a power transmission unit of a vehicle transmitting power outputted from a prime mover, comprising:

• detecting or predicting a generation of a resonance of the power transmission unit resulting from a power transmission;
• detecting a driving condition of a vehicle in case a generation of a resonance is detected or predicted at the step of detecting or predicting a generation of a resonance;
• and
• selecting a control for dampening the detected or predicted resonance on the basis of the driving condition of the vehicle detected at the step of detecting a driving condition,
• wherein the detected driving condition is categorized into at least a first driving condition and a second driving condition, the first and second driving conditions are different from each other, and
• wherein a first resonance dampening control is selected when the first driving condition is detected and a second resonance damping control is selected when the second driving condition is detected.

A control method for a power transmission unit of a vehicle transmitting power outputted from a prime mover, comprising:

• detecting or predicting a generation of a resonance of the power transmission unit resulting from the power transmission;
• and
• carrying out a plurality of resonance dampening controls which dampens the resonance detected or predicted at the step of detecting or predicting a generation of a resonance in order of priority,
• wherein the plurality of resonance dampening controls includes a priority resonance dampening control, and
• the priority resonance dampening control reduces torque capacity of a clutch mechanism by releasing the clutch mechanism if the clutch mechanism is fully engaged.