초록 ▼

The present invention provides a power transmitting apparatus that uses a small configuration to efficiently carry out various forms of propulsions such as a speed change propulsion and even an EV propulsion (electric propulsion) including a series type EV propulsion. The power transmitting apparatu

The present invention provides a power transmitting apparatus that uses a small configuration to efficiently carry out various forms of propulsions such as a speed change propulsion and even an EV propulsion (electric propulsion) including a series type EV propulsion. The power transmitting apparatus includes a clutch 8 that connects and disconnects rotation transmissions between an output shaft 1a of an engine 1 and an input shaft 4 r of one 4 of two power distributors 4 and 5 to which a rotational drive force is transmitted by the engine 1, a clutch 9 that connects and disconnects rotation transmissions between one of two output shafts 5c, 5c of the power distributor 5 and a power output shaft 12, and rotation regulating means 10 and 11 that properly inhibit rotation of the input shaft 4r of the power distributor 4 and rotation of the output shaft 5c of the power distributor 5. Motors 6 and 7 apply torques to an output shaft 4s of the power distributor 4 and an output shaft 5s of the power distributor 5, respectively.

대표청구항 ▼

What is claimed is: 1. A power transmitting apparatus for a hybrid vehicle comprising a first and second power distributors each having an input shaft to which a rotational drive power from an engine is transmitted, a power output shaft to which a first output shaft of two output shafts of said fir

What is claimed is: 1. A power transmitting apparatus for a hybrid vehicle comprising a first and second power distributors each having an input shaft to which a rotational drive power from an engine is transmitted, a power output shaft to which a first output shaft of two output shafts of said first power distributor and a first output shaft of two output shafts of said second power distributor transmit rotational drive powers and which output the transmitted rotational drive powers to drive wheels of the vehicle, a first motor that applies a drive torque or regenerative torque to a second output shaft of said first power distributor, and a second motor that applies a drive torque or regenerative torque to a second output shaft of said second power distributor, a speed reduction ratio for a rotation transmitting system from said engine to said power output shaft via said first power distributor having a value different from a value of a speed reduction ratio for a rotation transmitting system from said engine to said power output shaft via said second power distributor, wherein the apparatus comprises first clutch means for connecting and disconnecting said engine to and from the input shaft of said first power distributor for rotation transmission, second clutch means for connecting and disconnecting the first output shaft of said second power distributor to and from the power output shaft for rotation transmission, first rotation regulating means operating in an open state in which the input shaft of said first power distributor is rotatable and in a braking state in which the input shaft is inhibited from rotating, and second rotation regulating means operating in an open state in which the first output shaft of the second power distributor is rotatable and in a braking state in which the first output shaft s inhibited from rotating. 2. The power transmitting apparatus for a hybrid vehicle according to claim 1, wherein each of said first and second power distributors comprises a pinion gear device. 3. The power transmitting apparatus for a hybrid vehicle according to claim 2, wherein the input shaft, first output shaft, and second output shaft of each of said power distributors are a ring gear, a carrier, and a sun gear of the pinion gear device respectively constituting the power distributor. 4. The power transmitting apparatus for a hybrid vehicle according to any of claim 1 to 3, wherein said first rotation regulating means comprises a one-way clutch for inhibiting only rotation of the input shaft of said first power distributor in a predetermined one of two rotating directions. 5. The power transmitting apparatus for a hybrid vehicle according to claim 4, wherein said first rotation regulating means further comprises forced braking means for inhibiting rotation of the input shaft of said first power distributor via an actuator. 6. The power transmitting apparatus for a hybrid vehicle according to claim 1, wherein said second rotation regulating means comprises a one-way clutch for inhibiting only rotation of the first output shaft of said second power distributor in a predetermined one of two rotating directions. 7. The power transmitting apparatus for a hybrid vehicle according to claim 6, wherein said second rotation regulating means further comprises forced braking means for inhibiting rotation of the first output shaft of said second power distributor via an actuator. 8. The power transmitting apparatus for a hybrid vehicle according to claim 1, wherein said first and second clutch means are operated in a connected state and said first and second rotation regulating means are operated in an open state in a speed change propulsion mode, and the speed change propulsion mode is a mode in which the vehicle is propelled by transmitting the rotational drive power of said engine to said power output shaft via said first and second power distributors while generating a drive torque in one of said first and second motors and a regenerative torque in the other and in which the torques generated by said first and second motors are controlled to control a speed change ratio between the engine to the power output shaft. 9. The power transmitting apparatus for a hybrid vehicle according to claim 8, wherein said first and second clutch means are operated in a disconnected state and said first rotation regulating means operates in a braking state in an electric propulsion mode, and the electric propulsion mode is a mode in which the drive torque of said first motor is transmitted to said power output shaft to start and propel the vehicle. 10. The power transmitting apparatus for a hybrid vehicle according to claim 9, wherein a rotation transmitting system from said first motor to said power output shaft via said first power distributor has a higher speed reduction ratio than a rotation transmitting system from said second motor to said power output shaft via said second power distributor. 11. The power transmitting apparatus for a hybrid vehicle according to claim 9, wherein said first rotation regulating means comprises a one-way clutch for inhibiting only rotation of the input shaft of said first power distributor in a predetermined one of the two rotating directions and forced braking means for inhibiting rotation of the input shaft of said first power distributor via the actuator, and wherein when the vehicle is propelled forward in the electric propulsion mode, said first motor is caused to generate a drive torque that advances the vehicle, while said first rotation regulating means is operated in the braking state using its one-way clutch, and when the vehicle is propelled backward in the electric propulsion mode, said first motor is caused to generate a drive torque in a direction inverse to that of the drive torque generated when the vehicle is propelled forward, while said first rotation regulating means is operated in the braking state using its forced braking means. 12. The power transmitting apparatus for a hybrid vehicle according to claim 11, wherein the drive torque of said second motor is transmitted to said engine to start the engine in a state that said first and second clutch means are operated in the disconnected state and said second rotation regulating means is operated in the braking state, before the vehicle starts traveling backward in said electric propulsion mode. 13. The power transmitting apparatus for a hybrid vehicle according to claim 12, wherein said second rotation regulating means comprises a one-way clutch for inhibiting only rotation of the first output shaft of said second power distributor in a predetermined one of the two rotating directions, and when said engine is started before said vehicle starts traveling backward, the second rotation regulating means is operated in the braking state using its one-way clutch. 14. The power transmitting apparatus for a hybrid vehicle according to claim 9, wherein said electric propulsion mode includes a series type electric propulsion mode in which the rotational drive power of said engine is transmitted to said second motor to allow the second motor to generate a regenerative power, and in the series type electric propulsion mode, said second rotation regulating means is operated in the braking state. 15. The power transmitting apparatus for a hybrid vehicle according to claim 14, wherein the drive torque of said second motor is transmitted to said engine to start the engine in a state that said first and second clutch means are operated in the disconnected state and said second rotation regulating means is operated in the braking state, before said series type electric propulsion mode is started. 16. The power transmitting apparatus for a hybrid vehicle according to claim 15, wherein said second rotation regulating means comprises a one-way clutch for inhibiting only rotation of the first output shaft of said second power distributor in a predetermined one of the two rotating directions and forced braking means for inhibiting rotation of the first output shaft of said second power distributor via the actuator, and wherein when said engine is started before said series type electric propulsion mode is started, said second rotation regulating means is operated in the braking state using its one-way clutch, and in said series type electric propulsion mode, said second rotation regulating means is operated in the braking state using its forced braking means. 17. The power transmitting apparatus for a hybrid vehicle according to claim 14, wherein said series type electric propulsion mode and said speed change propulsion mode are shifted to each other via a transition mode, and the transition mode is a mode in which a rotation speed of said first motor and the torque generated by the second motor are set at almost zero, in which said first clutch means is operated in the connected state, with said first rotation regulating means operated in the open state, and in which an operational state of the second clutch means and second rotation regulating means is switched, and. 18. The power transmitting apparatus for a hybrid vehicle according to claim 14, wherein said engine has a plurality of cylinders, and said series type electric propulsion mode comprises a partial cylinder halt mode in which some of all the cylinders of the engine are halted. 19. The power transmitting apparatus for a hybrid vehicle according to claim 8, wherein said first clutch means is operated in the disconnected state, said second clutch means is operated in the connected state, said first rotation regulating means is operated in the braking state, said second rotation regulating means is operated in the open state, and the second motor is caused to generate the regenerative torque in a parallel type propulsion mode, and the parallel type propulsion mode is a mode in which the vehicle is propelled by transmitting the rotational drive power of said engine and the rotational drive power of said first motor to said power output shaft in parallel. 20. The power transmitting apparatus for a hybrid vehicle according to claim 8, comprising third rotation regulating means that can operate in a braking state in which rotation of a rotatable shaft of one of said first and second motors is inhibited which motor has the lower speed reduction ratio and which motor applies a torque to the second output shaft of the power distributor in the rotation transmitting system with the lower speed reduction ratio, and in an open state in which the rotatable shaft can be rotated, and wherein if said engine becomes inoperative while the vehicle is being propelled in said speed change propulsion mode, said third rotation regulating means is operated in the braking state. 21. The power transmitting apparatus for a hybrid vehicle according to claim 20, wherein said third rotation regulating means comprises a one-way clutch for hindering the rotatable shaft of said motor with the lower speed reduction ratio from rotating in an inverse direction while the vehicle is being propelled in said speed change propulsion mode. 22. The power transmitting apparatus for a hybrid vehicle according to claim 8, wherein at least one of said two rotation transmitting systems has a speed change unit that can change the speed reduction ratio for the rotation transmitting system at a plurality of levels, and the speed change unit changes the speed reduction ratio to establish a state in which the rotation transmitting system with said first power distributor has a higher speed reduction ratio than the rotation transmitting system with said second power distributor and a state in which the rotation transmitting system with said second power distributor has a higher speed reduction ratio than the rotation transmitting system with said first power distributor, and wherein the apparatus comprises third rotation regulating means that can operate in a braking state in which the rotatable shaft of said first motor is inhibited from rotating and in an open state in which the rotatable shaft is rotatable, and fourth rotation regulating means that can operate in a braking state in which the rotatable shaft of said second motor is inhibited from rotating and in an open state in which the rotatable shaft is rotatable, and wherein if said engine becomes inoperative while the vehicle is being propelled in said speed change propulsion mode in which the rotation transmitting system with said first power distributor has a higher speed reduction ratio than the rotation transmitting system with said second power distributor, said fourth rotation regulating means is operated in the braking state, and if said engine becomes inoperative while the vehicle is being propelled in said speed change propulsion mode in which the rotation transmitting system with said second power distributor has a higher speed reduction ratio than the rotation transmitting system with said first power distributor, said third rotation regulating means is operated in the braking state. 23. The power transmitting apparatus for a hybrid vehicle according to claim 22, wherein said third rotation regulating means comprises a first one-way clutch for hindering the first motor from rotating in an inverse direction while the vehicle is being propelled in said speed change propulsion mode and the rotation transmitting system with said first power distributor has a lower speed reduction ratio than the rotation transmitting system with said second power distributor, and first one-way clutch OFF means for stopping the rotation inhibiting function of the first one-way clutch while the vehicle is being propelled in said speed change propulsion mode in which the rotation transmitting system with said first power distributor has a higher speed reduction ratio than the rotation transmitting system with said second power distributor, and wherein said fourth rotation regulating means comprises a second one-way clutch for hindering the second motor from rotating in an opposite direction while the vehicle is being propelled in said speed change propulsion mode in which the rotation transmitting system with said second power distributor has a lower speed reduction ratio than the rotation transmitting system with said first power distributor, and second one-way clutch OFF means for stopping the rotation inhibiting function of the second one-way clutch while the vehicle is being propelled in said speed change propulsion mode in which the rotation transmitting system with said second power distributor has a higher speed reduction ratio than the rotation transmitting system with said first power distributor.