摘要:
In a vehicle driving apparatus including a differential mechanism capable of executing a differential action, a control device can make the driving apparatus small-size, improve fuel consumption, and increase output torque. A transmission mechanism can be switched to a continuously variable shifting state and a step variable shifting state, by a switching clutch or a switching brake. Also, with a switch control bringing the switching clutch into a half-engaged state, during an engine startup/running, while the differential portion is allowed to operate as the electrically controlled continuously variable transmission, a reaction force against an engine torque is generated by the half-engaged switching clutch. Thus, the engine torque not less than the torque bearable by a first electric motor can be inputted into the differential portion, thereby increasing the output torque.
摘要:
A control apparatus for a vehicular drive system arranged to electrically transmit a portion of an output force of an engine through an electric path, which control apparatus is configured to reduce loads of components associated with the electric path and to restrict a temperature rise of the components associated with the electric path, making it possible to reduce the required size of a cooling system.Electric-energy restriction control means 84 is provided to place differential portion 11 in a non-differential state or to place switching clutch C0 or switching brake B0 in a partially engaged state, when an amount of transmission of electric energy through the electric path has increased to a thermal limit, so that a reaction force which corresponds to engine torque TE and which must be received by first electric motor M1 is reduced, whereby an amount of generation of electricity by the first electric motor m1 is reduced, and the amount of the generated electric energy is reduced, making it possible to restrict the temperature rise of the components associated with the electric path and to reduce the required size of the cooling system for cooling those components and the loads of the components associated with the electric path.
摘要:
A drive apparatus for vehicle is disclosed having a coupling device (switching clutch B0 or switching brake C0) operative to switch a transmission mechanism 10 between a continuously variable shifting state and a step-variable shifting state with both advantages including improved fuel consumption achieved by a transmission, enabled to electrically control a speed ratio, and increased power transmitting efficiency provided by a gear-type transmitting device in which drive power is mechanically transmitted. With the transmission mechanism 10, switching control means 50 allows a differential portion 11 to be maintained in the continuously variable shifting state or the differential portion 11 is preferentially placed in the continuously variable shifting state during a start-up of an engine. This allows an engine speed NE to rapidly increase beyond a given engine speed NE′ to immediately transit a given engine speed area NER, thereby suppressing the occurrence of vibrational noise of the vehicle during the start-up of the engine.
摘要:
A control apparatus for a vehicular drive system including a differential mechanism including an electric motor. The drive system includes a switching clutch and switching brake to switch the transmission mechanism between a continuously-variable shifting state and a step-variable shifting state. A shifting control mechanism changes a manner of controlling shifting action of the transmission mechanism during shifting action of an automatic transmission portion, for reducing a shifting shock, depending upon whether a differential portion is placed in the continuously-variable shifting state in which engine speed is variable due to differential function irrespective of rotating speed of power transmitting member, or the non-continuously-variable shifting state in which the engine speed is more difficult to be variable than in the continuously-variable shifting state.
摘要:
A control apparatus for a vehicular drive system including (a) a differential portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, a second electric motor disposed in a power transmitting path between the power transmitting member and a vehicle drive wheel, and a switching clutch and a switching brake provided in the differential mechanism and operable to limit a differential function of the differential portion, and (b) a step-variable automatic transmission portion constituting a part of the power transmitting path and operable to perform a clutch-to-clutch shifting action by a releasing action of a coupling device and an engaging action of another coupling device, the control apparatus including a step-variable shifting control configured to change an amount of racing of an input speed of the automatic transmission portion during the clutch-to-clutch shifting action, depending upon whether the differential function of the differential portion is limited by the switching clutch and brake.
摘要:
A second electric motor is arranged on a first axis on which an output shaft of the engine is arranged, a transmission is arranged on a second axis which is parallel with the first axis, and a clutch is arranged on the first axis to selectively connect and disconnect the second electric motor and the transmission to and from the engine. Power on the first axis is transmitted to an input shaft of the transmission via a power transmitting mechanism.
摘要:
A control apparatus for a vehicular drive system including a continuously-variable transmission portion operable as an electrically controlled continuously variable transmission, and a step-variable transmission portion, the continuously variable transmission portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle. The control apparatus including a differential-state limiting device provided in the differential mechanism, and operable to limit a differential function of the differential mechanism, for limiting an operation of the continuously-variable transmission portion as the electrically controlled continuously variable transmission, and an electric-motor control portion for controlling a drive-force assisting operation to generate an assisting drive force to drive the vehicle during a shifting action of the step-variable transmission portion, in different manners depending upon whether the continuously-variable transmission portion is placed in a continuously-variable shifting or a non-continuously-variable shifting state.
摘要:
A control apparatus for a vehicular drive system including a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor connected to the power transmitting member. The control apparatus, which permits size reduction of the vehicular drive system, or improvements of fuel economy and vehicle drivability, includes a switching clutch or switching brake for switching a the differential mechanism between a continuously-variable shifting state and a step-variable shifting state, to enable the drive system to have both of an advantage of a fuel economy improvement of a transmission the speed ratio of which is electrically variable, and an advantage of high power transmitting efficiency of a gear type power transmitting device. The control apparatus includes an engine-torque-variation restriction control operable in the continuously-variable shifting state of the differential mechanism, to control an electric path torque, for restricting a variation of the torque to be transmitted to the power transmitting member, irrespective of a variation of the engine torque, so that the engine torque variation to be transmitted to drive wheels is restricted to improve the vehicle drivability.
摘要:
A control apparatus for a vehicular drive system provided with a step-variable transmission portion operable to transmit an output of an engine to a drive wheel of a vehicle and functioning as a step-variable transmission, and an input clutch operable to permit and inhibit an input of a drive force from the engine to the step-variable transmission portion, the control apparatus including an input-clutch control portion operable to reduce a torque capacity of the input clutch, during a shifting action of the step-variable transmission portion, for limiting a torque to be transmitted to the step-variable transmission portion, to a value not larger than a predetermined value.
摘要:
A transmission mechanism including a switching clutch or brake that is switchable between a continuously-variable shifting state and a step-variable shifting state, and has both an advantage of improved fuel economy provided by a transmission, the speed ratio of which is electrically variable, and an advantage of high power transmitting efficiency provided by a gear type power transmitting device constructed for mechanical transmission of power. While a clutch-to-clutch shifting action of an automatic transmission portion is in a tie-up state, a differential portion is placed in a continuously-variable shifting state by switching control, and engine speed is changed under the control of hybrid control, so as to prevent a drop of the engine speed for thereby reducing a shock of the shifting action, unlike in a non-continuously-variable shifting state of the differential portion in which the engine speed is directly influenced by the tie-up state.