Clutch control device and clutch control method

A clutch control device that controls a clutch by driving a piston using pressure of a working fluid, comprising:

• stroke start determining means for determining that a stroke of the piston has started and detecting a stroke start pressure at that time;
• stroke end determining means for determining that the stroke of the piston is complete and detecting a stroke end pressure at that time;
• clutch stroke width calculating means for calculating a clutch stroke width from the detected stroke start pressure and the detected stroke end pressure;
• and
• learning means for learning the stroke end pressure detected by the stroke end determining means when the clutch stroke width is within a predetermined range.

A clutch control method for controlling a clutch by driving a piston using pressure of a working fluid, comprising the steps of:

• determining that a stroke of the piston has started and detecting a stroke start pressure at that time;
• determining that the stroke of the piston is complete and detecting a stroke end pressure at that time;
• estimating a range of the stroke end pressure from the detected stroke start pressure;
• and
• learning the detected stroke end pressure when the detected stroke end pressure is within the estimated range of the stroke end pressure.

A clutch control method for controlling a clutch by driving a piston using pressure of a working fluid, comprising:

• determining that a stroke of the piston has started and detecting a stroke start pressure at that time;
• determining that the stroke of the piston is complete and detecting a stroke end pressure at that time;
• calculating a clutch stroke width from the stroke start pressure and the stroke end pressure;
• and
• learning the detected stroke end pressure when the clutch stroke width is within a predetermined range.

A clutch control device that controls a clutch by driving a piston using a working fluid, comprising:

• a pressure sensor for detecting a pressure of the working fluid;
• an electric control device functioning to:
• determine from the detected pressure that a stroke of the piston has started and detect a stroke start pressure at that time;
• determine from the detected pressure that the stroke of the piston is complete and detect a stroke end pressure at that time;
• estimate a range of the stroke end pressure from the detected stroke start pressure;
• and
• learn the detected stroke end pressure when the detected stroke end pressure is within the estimated range of the stroke end pressure.

A clutch control device that controls a clutch by driving a piston using a working fluid, comprising:

• a pressure sensor for detecting a pressure of the working fluid;
• an electric control device functioning to:
• determine from the detected pressure that a stroke of the piston has started and detect a stroke start pressure at that time;
• determine from the detected pressure that the stroke of the piston is complete and detect a stroke end pressure at that time;
• calculate a clutch stroke width from the detected stroke start pressure and the detected stroke end pressure;
• and
• learn the detected stroke end pressure when the clutch stroke width is within a predetermined range.