48results about How to "High gear ratio" patented technology

The invention relates to a method for the operation of a dual-clutch transmission (1) including sub-transmissions (31, 32) wherein, through a clutch of a dual-clutch device (4), the sub-transmissions are able to be switched on in the power flux of the dual-clutch transmission or are able to be switched off from the power flux. In the sub-transmissions, two different transmission ratios are able to be engaged or disengaged through the actuation of shifting elements. In the operation of the dual-clutch transmission, one of the sub-transmissions (31 / 32) is switched on, while the other sub-transmission (32 / 31) is switched off. If the transmission ratio in the switched-on sub-transmission (31 / 32) is engaged, all transmission ratios in the switched-off sub-transmission are simultaneously disengaged through the shifting elements(14, 17 / 22, 25), as long as there is no request for a change of transmission ratio in the dual-clutch transmission (1).

The invention relates to a driving device, used for a wheel of a motor vehicle having the aid of a motor and driven by a differential mechanism; wherein the motor possessing rotors and a stator drives the input element of the differential mechanism, and the output element of the differential mechanism is outputted to the wheel of the motor vehicle via an output shaft. In order to realize a structure which is compact in structure and favorable in gear ratio, the driving device is provided. The annular rotors (18) of the motor (12) are outputted to the input element (50) of the differential mechanism (48) via variable-speed control mechanisms (64, 64'), and the variable-speed control mechanisms (64, 64') and the differential mechanism (48) are integrated in the rotors (18, 20).

The invention relates to a method for starting an internal combustion engine (14) of a hybrid drive (12) comprising at least one electric drive (20). This can be coupled to the internal combustion engine (14) via a first clutch (16) for pulsed starting of the internal combustion engine. A rotational speed change (34, 36) in the at least one electric drive (20), which change occurs during pulsed starting of the internal combustion engine (14), is compensated for by continuous changes (42, 44) in the transmission ratio in a vehicle gearbox (26).

In a gear shift control device for a vehicle that shifts a transmission having a plurality of gears based on a shift line set in a shift map, an upshift line for shifting to the highest gear, and a downshift line that is located in a high vehicle speed region on the side of a higher vehicle speed than the upshift line are set in the shift map. The downshift line is used when shifting from the highest gear to a prescribed gear that has a larger gear ratio than the highest gear.

The invention discloses a tape measure. The tape measure comprises a tape shell, a tape core disk, and a driving mechanism, wherein the tape shell is used for accommodating and arranging the tape core disk which can rotate, a tape spring and a tape band; the tape band is wound on the tape core disk, and one end of the tape band extends out of the tape shell; and the tape spring is in driving connection with the tape core disk through the driving mechanism. The tape measure is characterized in that the tape spring is arranged in a cavity on one side of the tape shell; the tape core disk is arranged in a cavity on the other side of the tape shell and is rotatablely arranged on a tape core shaft in the tape shell; the position, which is near the center, of the tape core disk is provided withan accommodation space; and the inside of the accommodation space is provided with a planetary gear speed reduction mechanism which is taken as the driving mechanism to ensure that the tape core diskcan be directly or indirectly connected with the tape spring through the planetary gear speed reduction mechanism. The invention also discloses the driving mechanism which adopts the planetary gear speed reduction mechanism, and the driving mechanism also reduces the volume of the tape measure and the thickness under the condition of improving the variation ratio, and is particularly suitable forlong tape measures.

The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (12), a dog clutch (28), a friction clutch (30), an armature (26) to switch between the dog clutch (28) and the friction clutch (30), and an electromagnetic coil (31) to drive the armature (26). In the dog clutch (28) and the friction clutch (30), the coupling relationship among the rotational elements of the planetary gear mechanism (12) is set such that the dog clutch (28) is fastened and the friction clutch (30) is not fastened in speed reduction (the first speed), and the dog clutch (28) is not fastened and the friction clutch (30) is fastened in speed increase (the second speed). To prevent the torque drop when shifting the gears, a ratchet-type one-way clutch (50) is disposed such that a rotational phase position of the ratchet-type one-way clutch (50) is coincident with that of the dog clutch (28). When shifting from the second speed to the first speed, since the rotational phase of the dog clutch (28) is adjusted by the ratchet-type one-way clutch (50), the shifting is instantaneously completed without waiting operation for the phase adjustment, resulting in preventing a transmission shock.

Provided is a control device for a belt-type continuously variable transmission, the control device being capable of suppressing a deterioration in fuel consumption. Compared to the friction coefficient ([mu]1) of an inside portion in the radial direction of each tapered surface of a driven pulley (7), the friction coefficient ([mu]2) of an outside portion is formed smaller, and the present invention is provided with a gear change range setting means for increasing the frequency of changing the change gear ratio using the inside portion when a gear change control mode for improving energy consumption efficiency is selected.

The invention relates to a manual / automatic gearbox for mutually floating gear, which is characterized in that the structure is simple, visualized and compact; the manufacturing cost is low; the work is reliable; the transmission efficiency is high; the maintenance is convenient and the multi-pole shift can be realized. The invention comprises a gear shift, a clutch mechanism and a hydraulic electronic control system, wherein the gear shift comprises a flywheel which is fixedly connected to an input shaft by a spline. The input shaft comprises an outer spline and a locating jump ring. By a spline, the input shaft is respectively connected to a first-speed master gear, a second-speed master gear, a third-speed master gear, a backward master gear, a sixth-speed clutch piston, a fifth-speed clutch piston and a fourth-speed clutch piston. An output shaft comprises an outer spline and a locating jump ring. By a spline, the output shaft is respectively connected to a sixth-speed secondary gear, a fifth-speed secondary gear, a fourth-speed secondary gear and a first-speed clutch.