摘要:
A hybrid-vehicle drive method and system includes an internal combustion engine that includes an output shaft, a first electric motor/generator connected to the output shaft of the internal combustion engine via a power distribution mechanism, a wheel drive shaft connected to the output shaft of the internal combustion engine via the power distribution mechanism, a second electric motor/generator connected to the wheel drive shaft, and a transmission located on at least one of the wheel drive shaft and a connecting portion of the second electric motor/generator with the wheel drive shaft.
摘要:
A vehicle drive apparatus includes a first electric motor, a power distributing mechanism, a second electric motor, and a step-variable power transmission. A power transmitting portion includes a second case, accommodating the second electric motor and the automatic power transmission. One end of an input shaft of the automatic power transmission faces a drive apparatus output shaft, which is supported with a first support wall mounted on the second case, the second electric motor being accommodated in a compartment opposite to the automatic power transmission with respect to the first support wall, and one end of a second rotor supporting shaft of the second electric motor faces the automatic power transmission, which is supported with a second support wall mounted on the second case. The automatic power transmission and second electric motor can be unitized as one power transmitting portion, improving assembling workability of the drive apparatus.
摘要:
Vehicular drive system which is small-sized and/or improved in its fuel economy.A power distributing mechanism 16, which is provided with a differential-state switching device in the form of a switching clutch C0 and a switching brake B0, is switchable by the switching device between a differential state (continuously-variable shifting state) in which the mechanism is operable as an electrically controlled continuously variable transmission, and a fixed-speed-ratio shifting state in which the mechanism is operable as a transmission having a fixed speed ratio or ratios. The power distributing mechanism 16 is placed in the fixed-speed-ratio shifting state during a high-speed running of the vehicle or a high-speed operation of engine 8, so that the output of the engine 8 is transmitted to drive wheels 38 primarily through a mechanical power transmitting path, whereby fuel economy of the vehicle is improved owing to reduction of a loss of conversion of a mechanical energy into an electric energy. The mechanism 16 is also placed in the fixed-speed-ratio shifting state during a high-output operation of the engine 8, so that the required electric reaction of first electric motor M1 can be reduced, whereby the required size of the first electric motor M1, and the required size of the drive system 10 including the electric motor M1 can be reduced.
摘要:
Vehicular drive system which is small-sized and/or improved in its fuel economy.A power distributing mechanism 16, which is provided with a differential-state switching device in the form of a switching clutch C0 and a switching brake B0, is switchable by the switching device between a differential state (continuously-variable shifting state) in which the mechanism is operable as an electrically controlled continuously variable transmission, and a fixed-speed-ratio shifting state in which the mechanism is operable as a transmission having a fixed speed ratio or ratios. The power distributing mechanism 16 is placed in the fixed-speed-ratio shifting state during a high-speed running of the vehicle or a high-speed operation of engine 8, so that the output of the engine 8 is transmitted to drive wheels 38 primarily through a mechanical power transmitting path, whereby fuel economy of the vehicle is improved owing to reduction of a loss of conversion of a mechanical energy into an electric energy. The mechanism 16 is also placed in the fixed-speed-ratio shifting state during a high-output operation of the engine 8, so that the required electric reaction of first electric motor M1 can be reduced, whereby the required size of the first electric motor M1, and the required size of the drive system 10 including the electric motor M1 can be reduced.
摘要:
When a sub transmission mechanism is switched to the LO-side gear stage, a hybrid control unit executes a control operation such that vehicle speed does not exceed limit vehicle speed determined in advance in accordance with the transmission gear ratio of LO-side gear stage. Specifically, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator, so that rotation speed of the second motor generator does not exceed tolerable rotation speed. Further, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator when any of temperatures respectively detected by temperature sensors exceed corresponding upper limit temperatures.
摘要:
Hybrid controller 52 for a vehicular drive system is operable during a shifting control of step-variable transmission portion 20 for a stepping change of its speed ratio, for changing a speed ratio of continuously-variable transmission portion 11, such that total speed ratio γT of transmission mechanism 10 defined by the speed ratio of the continuously-variable transmission portion 11 and the speed ratio of the step-variable transmission portion 20 is continuously changed, irrespective of the stepping change of the speed ratio of the step-variable transmission portion 20, so that an amount of stepping change of engine speed NE before and after a shifting action of the step-variable transmission portion 20 is reduced, and a shifting shock of the step-variable transmission portion 20 is reduced. The hybrid controller 52 permits the transmission mechanism 10 to function as a continuously variable transmission, thereby improving fuel economy of the vehicular drive system.
摘要:
Vehicle-starting-engine-torque restricting means 86 is provided to restrict engine torque TE upon starting of a vehicle with engine 8 used as a vehicle drive power source, so that a required output of first electric motor M1 which generates a reaction force corresponding to the engine torque TE can be made smaller than in the case where the engine torque TE is not restricted. Namely, the vehicle-starting-engine-torque restricting means 86 eliminates a need of increasing the maximum output of the first electric motor M1 to generate the reaction force corresponding to the engine torque TE, making it possible to reduce the required size of the first electric motor M1.
摘要翻译:提供车辆起动发动机扭矩限制装置86以在用作车辆驱动动力源的发动机8的车辆起动时限制发动机扭矩T E E,使得第一电动机的所需输出 可以使产生与发动机扭矩T E E相对应的反作用力的M 1小于在发动机转矩T E E不限制的情况下。 也就是说,车辆起动 - 发动机 - 转矩限制装置86消除了增加第一电动机M 1的最大输出以产生对应于发动机扭矩T E E的反作用力的需要,使得 可以减小第一电动机M 1的所需尺寸。
摘要:
A vehicular drive system which includes a first electric motor, a power distributing mechanism (first gear device), a second electric motor, and a step-variable automatic transmission (second gear device), and in which the first electric motor and the power distributing mechanism constitute a first unit, while the second electric motor and the automatic transmission constitute a second unit, and wherein the power distributing mechanism has an output shaft, and the automatic transmission has an input shaft which is connected to the output shaft, whereby a drive force can be transmitted between the first unit and the second unit. The individually prepared first unit and the second unit are assembled together into the vehicular drive system such that the output shaft of the power distributing mechanism and the input shaft of the automatic transmission are connected to each other. Accordingly, the drive system has an improved efficiency of assembling.
摘要:
A vehicular transmission mechanism, switchable between a continuously-variable shifting state and a step-variable shifting state, and a control device for controlling an operation of switching of the shifting state of the transmission mechanism so as to reduce its switching shock and improve the durability of coupling devices. The transmission mechanism 10 is switchable between the electrically established continuously-variable shifting state and the step-variable shifting state, by selective releasing and engaging actions of a switching clutch and brake.
摘要:
A control apparatus for controlling a vehicle drive apparatus including: (i) a power transmitting member; (ii) a differential mechanism which has a first element connected to an engine, a second element connected to a first electric motor, and a third element connected to a second electric motor and the power transmitting member; (iii) an automatic transmission constituting at least a part of a power transmitting path between the power transmitting member and a drive wheel; and (iv) a differential-state switching device operable to selectively place the differential mechanism in its differential state in which the second and third elements are rotatable at respective different speeds, and in its non-differential state in which the second and third elements are not rotatable at respective different speeds. The control apparatus includes a switching device controller operable to cause the differential-state switching device to place the differential mechanism in the differential state, at least during generation of an electric energy by the first electric motor and/or second electric motor while the power transmitting path is being disconnected. Also disclosed is a vehicle drive system including the above-described control apparatus.