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

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).

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 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.

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.