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US 2001/0019984 A1Published application
Apparatus for controlling a power transmission device
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsShigeji Nakano, Junji Urano
Life of this patent
Estimating the term…
Abstract
The present invention relates to an apparatus for controlling a power transmission device, having a lockup shift valve that changes the operating state and non-operating state of the lockup mechanism, and a regulator valve that is capable of changing the pressure (line pressure) of working oil used to operate a speed changer CVT between a low pressure and a high pressure, wherein changeover between a mode, where the lockup mechanism is operated and the line pressure is set to a low pressure, and a mode, where the lockup mechanism is not operated and the line pressure is set to a high pressure, is carried out by changing the output of ON and OFF signals from the first solenoid valve.
Claims19
An apparatus for controlling a power transmission device having:
- a speed changer for changing power inputted from a prime mover and outputting the same;
- a torque converter, which is provided between the output shaft of said prime mover and the input shaft of said speed changer, for transmitting power therebetween;
- and
- a lockup mechanism, which engages the output shaft of said prime mover with the input shaft of said speed changer, for transmitting power therebetween;
- wherein said apparatus comprises a lockup changing means that causes said lockup mechanism to change the position thereof between the first position where the lockup mechanism supplies and discharges said working oil so as to carry out said connection and the second position where the lockup mechanism supplies and discharges said working oil so as to carry out said disconnection;
- a working oil pressure changeover setting means that is capable of changing the pressure setting state thereof to the first state where the pressure of working oil used to operate said speed changer is set to the first pressure and to the second state where the pressure of working oil used to operate said speed changer is set to the second pressure, which is higher than said first pressure;
- and
- a signal pressure outputting means for selectively outputting any one of the first signal pressure by which said lockup changing means is positioned at said first position and said working oil pressure changing means is made into said first state and the second signal pressure by which said lockup changing means is positioned at said second position and said working oil pressure changing means is made into said second state.
5 more elements
An apparatus for controlling a power transmission device having:
- a speed changer for changing power inputted from a prime mover and outputting the same;
- a torque converter, which is provided between the output shaft of said prime mover and the input shaft of said speed changer, for transmitting power therebetween;
- and
- a lockup mechanism for transmitting power between the output shaft of said prime mover and the input shaft of said speed changer at an engagement capacity in response to a supplied oil pressure;
- wherein
- said lockup mechanism comprises:
- a lockup changing means for changing said lockup mechanism to the first position where said working oil is supplied and discharged so that the output shaft of said prime mover and the input shaft of said speed changer are engaged with each other, and the second position where said working oil is supplied and discharged so that said lockup mechanism disengages said engagement;
- a capacity-change type hydraulic pump that is capable of supplying a working oil used to operate said speed changer at the first capacity and supplying said working oil at the second capacity larger than said first capacity;
- a capacity changing means for changing said hydraulic pump to the first position where said hydraulic pump is caused to supply working oil at said first capacity, and to the second position where said hydraulic pump is caused to supply said working oil at said second capacity;
- and
- a signal pressure outputting means for selectively outputting any one of the first signal pressure, by which said lockup changing means is positioned at said first position, and said capacity changing means is positioned at said first position, and the second signal pressure, by which said lockup changing means is positioned at said second position, and said capacity changing means is positioned at said second position.
8 more elements
An apparatus for controlling a power transmission device having:
- a speed changer for changing power inputted from a prime mover and outputting the same;
- a torque converter, which is provided between the output shaft of said prime mover and the input shaft of said speed changer, for transmitting power therebetween;
- and
- a lockup mechanism for transmitting power between the output shaft of said prime mover and the input shaft of said speed changer at an engagement capacity in response to a supplied oil pressure;
- further comprising:
- friction engagement elements for transmitting power in said speed changer at an engagement capacity in response to a supplied oil pressure;
- a linear solenoid valve for producing a control pressure by regulating the line pressure;
- a first change valve having a first position where said control pressure is supplied to said friction engagement elements;
- and a second position where said line pressure is supplied to said friction engagement elements;
- a second change valve having a first position where said control pressure is supplied to said lockup mechanism and a second position where the supply of said control pressure to said lockup mechanism is interrupted;
- and
- a signal pressure outputting means for selectively outputting any one of the first signal pressure, by which said first change valve is positioned at said first position, and said second change valve is positioned at said second position, and the second signal pressure, by which said first change valve is positioned at said second position, and the second change valve is positioned at said first position.
9 more elements
Dependencies are inferred from the claim text.