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Servo-assisted gearshift control device for a motor-vehicle dual-clutch transmission

A control device, dual clutch technology, applied in the direction of mechanical control device, transmission control, control/regulation system, etc., can solve problems such as requiring a large number of components

Inactive Publication Date: 2008-09-03
CENT RICERCHE FIAT SCPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This known shift control device has the advantage of allowing the hydraulic actuators to be controlled independently of each other, however, it has the disadvantage of requiring a large number of components since two hydraulic actuators are provided for each shift fork

Method used

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  • Servo-assisted gearshift control device for a motor-vehicle dual-clutch transmission
  • Servo-assisted gearshift control device for a motor-vehicle dual-clutch transmission
  • Servo-assisted gearshift control device for a motor-vehicle dual-clutch transmission

Examples

Experimental program
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Embodiment Construction

[0011] see figure 1 and figure 2 , a dual clutch transmission for an automobile with six or seven forward and reverse gears is generally indicated at 10 and includes a clutch unit (not shown) housed in a housing 12 and a gearbox housed in a gearbox 16 14 (which can be found at figure 2 see in part). The gearbox 14 comprises, in a manner known per se, two coaxial input shafts (not shown) and two output shafts (also not shown), arranged parallel to the two input shafts and carrying a plurality of idle gear wheels (not shown) which may be coupled so that each rotates with the corresponding output shaft via four engaging sliding sleeves (also not shown) which engage the sliding Three of the engaging sliding sleeves are always associated with two gears, while the remaining engaging sliding sleeves are associated with only one gear or with two gears depending on whether the transmission has six or seven forward gears respectively. couplet.

[0012] The displacement of the eng...

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PUM

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Abstract

The present invention provides a servo-assisted gearshift control device for a motor vehicle dual-clutch transmission. The device comprises four shift forks, each slidable among a first engagement position, a second engagement position and an intermediate neutral position between the two engagement positions, and an operating unit comprising four double-acting hydraulic actuators identical to each other and arranged to control each the displacement of a respective shift fork among the two engagement positions and the neutral position. The operating unit further comprises a support plate having holes for fixing to the gear case, and an actuator block accommodating the hydraulic actuators. The support plate and the actuator block are integrated to form a single body. In the assembled condition of the operating unit on the gear case, the actuator block is disposed on the side of the support plate facing towards the inside of the gear case.

Description

technical field [0001] The present invention relates generally to a dual-clutch transmission (dual-clutch transmission) for an automobile with six or seven forward gears and a reverse gear, and more particularly to a dual-clutch transmission with A control device for servo-assisted shifting of this transmission. Background technique [0002] From European Patent No. EP-B-1 216 371 is known a shift control device for a robotized gearbox (gear box), in particular a gearbox with six forward gears, and the shift control The device consists of four shift forks, each of which is along a corresponding fixed rod fixed to the gearcase, eight single-acting hydraulic actuators and a hydraulic control circuit slidably mounted to be selectively movable to a first engagement position and a second engagement position, each engagement position corresponding to the engagement of a corresponding gear; the eight single-acting hydraulic actuators are paired with each dial The fork is associat...

Claims

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Application Information

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IPC IPC(8): F16H61/00F16H59/04F16H63/32
CPCF16H2063/005F16H63/3023F16H61/30F16H63/38F16H61/688F16H2063/025Y10T74/19251
Inventor M·尤伯蒂V·帕斯托雷洛C·E·巴雷特G·L·普雷格诺拉托M·加拉贝洛D·卡纳佐
Owner CENT RICERCHE FIAT SCPA
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