Abstract:
PURPOSE: A planetary gear set assembly for an auto transmission is provided to remarkably reduce noise by controlling the operation of a double pinion planetary gear set ring gear and to eliminate the vibration of a rear ring gear due to the twist of a front ring gear. CONSTITUTION: A front ring gear(13) of a planetary gear set is located in the front side. A rear ring gear(33) of the planetary gear set is located in the back side. The front ring gear and rear ring gear are combined by a spline. A bush ring(50) is installed in a mounting groove formed on the front end of the front ring gear. The bush ring relatively revolves about a transmission case. The bush ring has a fixed width and is formed into a circular band shape. A part of the bush ring is cut to a width direction.
Abstract:
A dual clutch transmission for an HEV(Hybrid Electric Vehicle) is provided to maximize energy delivery efficiency by synchronizing one of even-speed or odd-speed driven gears with an output shaft. A dual clutch(100) receives a rotation force of an engine through a dual-mass flywheel. A first input shaft(101) is elongated from the dual clutch. A second input shaft(102) is arranged on an outer periphery of one end of the first input shaft and elongated from the dual clutch. Plural driving gears are mounted on the first input shaft to form a first driving gear set. Plural driving gears are mounted on the second input shaft to form a second driving gear set. First output devices are arranged at the first input shaft and one side of the second input shaft. Second output devices are arranged at the first input shaft and the other side of the second input shaft. A second motor(M2) operates as a brake, when a rotation force of a first motor(M1) is delivered to respective output shafts. A composite planetary gear set delivers the rotation force from the first motor to one of the first and second output devices.
Abstract:
PURPOSE: A regeneration braking control method of HEV(Hybrid Electric Vehicle) is provided to improve fuel efficiency of an HEV by performing regeneration braking after performing shift with an optimum transmission gear ratio. CONSTITUTION: A request braking force is calculated according to a regeneration braking request signal(S10). A request regeneration braking force is calculated from a charge state of a present battery and the request braking force(S12). A state of the request regeneration braking force is determined in an optimum efficiency region of a motor(S14). If the request regeneration braking force is collected to the optimum efficiency region, the regeneration braking is performed(S16). If the request regeneration braking force is not collected to the optimum efficiency region of the motor, an optimum transmission gear ratio is determined(S18). The regeneration braking is performed after performing shift of the optimum transmission gear ratio(S20).
Abstract:
A power delivery apparatus of a hybrid vehicle is provided to travel the vehicle without deceleration due to cut of a drive motor by synchronizing an output shaft with one of even-numbered gears and odd-numbered gears to transmit power from a drive motor. A power delivery apparatus of a hybrid vehicle comprises a clutch unit(100), a gear unit(200), an output shaft(400), and a planetary gear unit. Installed at the end of an input shaft(10), the clutch unit includes first and second clutches(110,120). The first clutch supplies power to even-numbered gears. The second clutch supplies power to odd-numbered gears. The gear unit is separately installed along the input shaft lengthwise. The output shaft is separated from the input shaft in parallel and provided with a synchronizer(300) which transfers power delivered through the input shaft and the gear unit. The planetary gear unit connects with one of the even-numbered gear and the odd-numbered gear and includes a first planetary gear(510) and second and third planetary gears(520,530). The first planetary gear connects with a rotary shaft of a drive motor(2). The second and third planetary gears connect with first and second motors(4,6). The motors are installed to assist power generated by the drive motor and to store power during regenerative braking caused by deceleration of the vehicle.