Abstract: A transmission, by means of inserting an electric motor between a couple of clutch shafts of twin-clutch type automatic transmission and controlling the torque and speed of the electric motor, establishing a smooth and efficient gear shifting control as well as enable to realize a creep control, idling stop starting control, R-to-D, D-to-R selecting control. The pre-stage gear is released after the torque transfer is completed with the electric motor, and the clutch is exchanged after synchronizing the motor speed with the electric motor. As the friction control of the clutch is not performed, smooth gear shift work can be realized, and the same control scheme extends to creep control, idling stop starting control, R-to-D, D-to-R selecting control to be enabled, which leads to such an effect that the life is extended without the clutch being worn away, as well as the drivability can be increased remarkably.

Abstract: (Subject) To provide an automotive shift change control system and automatic transmission system capable of giving to passengers a comfortable feeling of shift changing or of driving. [Means of Solution] A transmission 100 connects a vehicle-driving engine 1, an electrical rotary machine 5, and axles via a differential gearbox 31, transmits the power of the vehicle-driving engine 1 to the axles via the electrical rotary machine 5 during a shift change, and conducts the shift change.

Abstract: An electric motor is inserted between clutch shafts of a twin-clutch type automatic transmission are controlled for the torque and speed of the electric motor, establishing a smooth and efficient gear shifting control as well for a creep control, idling stop starting control, and R-to-D, D-to-R selecting control being controlled. The pre-stage gear is released after the torque transfer is completed with the electric motor, and the clutch is exchanged after synchronizing the motor speed with the electric motor. As a single transmission can realize multiple functions, there is such an effect that the overall cost can be reduced relatively.

Abstract: In a counter shaft type transmission equipped with a pair of transmission gear trains, the input shaft of the first gear train is connected with the engine and the second gear train is connected with the engine via a motor. The torque of the first gear train is briefly shifted onto the second gear train while a gear change in the first gear train is accomplished. By setting the gear ratio of the second gear train to a half-position of gear ratio of the first gear train, motor capacity and battery capacity can be reduced, reducing transmission cost. Further, with the motor, torque transfer becomes possible for both up-shift and down-shift and, since continuous ratios can be achieved, drivability of an automobile improves.

Abstract: A transmission in which an electric motor is inserted between a couple of clutch shafts of a twin-clutch type automatic transmission with the torque and speed of the electric motor being controlled. The pre-stage gear is released after the torque transfer is completed with the electric motor, and the clutch is exchanged after synchronizing the motor speed with the electric motor. Friction control of the clutch is not performed.

Abstract: In a shift system wherein the transfer of power is performed using a motor, the smaller the gear ratio difference is, the smaller can be made the motor output. However, the number of gears must be increased in order to reduce the gear ratio. As the number of gears increases, the problem of gear noise becomes more serious. It is necessary to prevent both an increase in the number of gears and an increase of the motor output.

Abstract: To enable compactness by lowering the connecting force of dog clutch so as to decrease the energy consumption and reduce the size of a system. A method of changing gears of automobile which moves the dog clutch in the axial direction at the time of gear change, while applying weak periodic torque vibration between the gear of the dog clutch and change gear of the gear shifter, and disconnects the two gears and, after the gear of the dog clutch and change gear of the gear shifter have been disconnected, also moves the dog clutch in the axial direction, while applying weak periodic rotating speed vibration between the gear of the dog clutch and another change gear of the gear shifter, and connects the two gears.

Abstract: A transmission, by means of inserting an electric motor between a couple of clutch shafts of twin-clutch type automatic transmission and controlling the torque and speed of the electric motor, establishing a smooth and efficient gear shifting control as well as enable to realize a creep control, idling stop starting control, R-to-D, D-to-R selecting control. The pre-stage gear is released after the torque transfer is completed with the electric motor, and the clutch is exchanged after synchronizing the motor speed with the electric motor. As the friction control of the clutch is not performed, smooth gear shift work can be realized, and the same control scheme extends to creep control, idling stop starting control, R-to-D, D-to-R selecting control to be enabled, which leads to such an effect that the life is extended without the clutch being worn away, as well as the drivability can be increased remarkably.

Abstract: The object of the invention is to provide a less expensive active transmission control system for an automobile, capable of disconnecting an engine, without increasing the number of dog clutches. In an active shift transmission, a second intermediate shaft is provided between a transmission input shaft connected with an engine and a transmission output shaft, and the transmission ratio is determined by the product of gear ratios of two sets of transmission gears. Further, a differential gear box is connected between both intermediate shafts and a motor is connected to the third shat of this differential gear box, so that the engine torque is borne by the motor on a temporary basis, whereby active transmission is performed. When the transmission gear of the input shaft is released, the engine rotation loss at the time of regenerative braking can be eliminated by disconnecting the engine.

Abstract: The improved CVT control apparatus for a vehicle is disclosed. By using the CVT control apparatus, it becomes possible that the drive feeling is constant independently of a running state, the vehicle is accelerated as the driver's intention if accelerated due to the actuation of an accelerator pedal, and the run of the vehicle is performed so as to improve the fuel consumption rate if the acceleration is not required. By always calculating a correct driving torque, the transmission gear ratio is calculated to obtain the target driving torque set based on the amount of actuation of an accelerator pedal, and the obtained target driving torque is corrected by the gradient of a road obtained from the calculated driving torque. Further, the gear ratio which aims at the improvement of acceleration and the gear ratio which aims at the improvement of the rate of fuel consumption are weighted and combined with each other, and the optimum gear ratio is obtained by using fuzzy inference.

Abstract: In a counter shaft type transmission equipped with a pair of transmission gear trains, the input shaft of the first gear train is connected with the engine and that of the second gear train is connected with the engine via a motor, the torque of the first gear train is shifted onto the second gear train for a while by means of the motor, and gear change in the first gear train is accomplished during the time. By setting the gear ratio of the second gear train to a half-position of gear ratio of the first gear train, motor capacity and battery capacity can be reduced and, because no clutch is needed, an economic transmission can be realized. Besides, by active transmission by means of the motor, torque transfer transmission becomes possible for both up-shift and down-shift. Furthermore, jump shift that has not been available in a prior art becomes possible and, since continuous ratio can be achieved, drivability of an automobile improves.

Abstract: The present invention provides a driving apparatus for a vehicle comprising an engine for providing a primary driving force to a driving shaft and an auxiliary power plant connected with the engine through a transmission the transmission comprising an input shaft for inputting the primary driving force from the engine and an output shaft connected to the input shaft for transmitting the primary driving force to the driving shaft wherein the auxiliary power plant provides a secondary driving force to the driving shaft during a shifting in speed.

Abstract: The improved CVT control apparatus for a vehicle is disclosed. By using the CVT control apparatus, it becomes possible that the drive feeling is constant independently of a running state, the vehicle is accelerated as the driver's intention if accelerated due to the actuation of an accelerator pedal, and the run of the vehicle is performed so as to improve the fuel consumption rate if the acceleration is not required.

Abstract: When conducting power-on shift by a clutch-to-clutch in an automatic transmission, friction control is unstable, and theoretically, torque transition is impossible when gear is downshifted. Also, so-called skip shift, i.e., the transmission between the transmission gears on the same clutch shaft cannot be done. Conducting active transmission by means of a motor enables up-shift and/or down-shift and also a torque transit transmission, as well as, enables the skip shift, as a practical application thereof. The torque of a first input shaft is transferred to a second input shaft, contemporarily, by means the motor, and during this, gears of the first input shaft are exchanged.

Abstract: A transmission, by means of inserting an electric motor between a couple of clutch shafts of twin-clutch type automatic transmission and controlling the torque and speed of the electric motor, establishing a smooth and efficient gear shifting control as well as enable to realize a creep control, idling stop starting control, R-to-D, D-to-R selecting control.

Abstract: In a power transmission apparatus for use in an automobile, including a gear-type transmission and plural numbers of motors, the gear-type transmission 100 comprises: a first input shaft 23, onto which the motive power is transmitted from an engine 1 through a first friction clutch 25; a second input shaft 24, onto which the motive power is transmitted from an engine 1 through a second friction clutch 26; and plural numbers of gear trains between the first input shaft 23 and an output shaft 27, and between the second input shaft 24 and the output shaft 27. Onto the first input shaft 23 and the second input shaft 24 are connected a first motor 29 and a second motor 30, so that the motive power is transmitted from the above two (2) motors through the plural numbers of gear trains up to the output shaft 27. Therefore, it is possible to make the maximum torque of the motors small, which is required when changing claw clutches provided on the gear trains.

Abstract: The present invention provides a driving apparatus for a vehicle comprising an engine for providing a primary driving force to a driving shaft and an auxiliary power plant connected with the engine through a transmission the transmission comprising an input shaft for inputting the primary driving force from the engine and an output shaft connected to the input shaft for transmitting the primary driving force to the driving shaft wherein the auxiliary power plant provides a secondary driving force to the driving shaft during a shifting in speed.

Abstract: The improved CVT control apparatus for a vehicle is disclosed. By using the CVT control apparatus, it becomes possible that the drive feeling is constant independently of a running state, the vehicle is accelerated as the driver's intention if accelerated due to the actuation of an accelerator pedal, and the run of the vehicle is performed so as to improve the fuel consumption rate if the acceleration is not required.

Abstract: A control apparatus and method for a powertrain of a vehicle provided with a drive unit which has the powertrain including an engine or an electric motor and an automatic transmission, and a driving shaft. The control apparatus is provided with first torque estimating means for obtaining a first estimated driving shaft torque, second torque estimating unit for obtaining a second estimated driving shaft torque used to correct said first estimated driving shaft torque, comparison means for comparing said first estimated driving shaft torque with said second estimated driving shaft torque, and driving shaft torque calculating means for calculating a driving shaft torque on the basis of the result of the comparison.

Abstract: An automatic transmission control apparatus for a vehicle and a control method thereof keep the optimum vehicle speed even on a road with a gradient such as an up hill or an down hill in line. Whether or not it is necessary to change the gear ratio is determined based on a vehicle speed and the road gradient and for generating a command signal to change the gear ratio if necessary, thereby changing the gear ratio.