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Calculation method for the position of a synchronized dual clutch gearbox

A calculation method, double clutch technology, applied to elements with teeth, transmission control, belt/chain/gear, etc., can solve the problems of inaccurate control of synchronous sleeves, degradation of comfort and wear

Active Publication Date: 2020-10-16
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Then, depending on the different driving conditions including the torque transmitted by the half-tank especially under torque, it is possible to obtain variants that lead to a change in the position of a certain point of the synchronizer of the other half-tank, which leads to inaccuracies in the control of the synchronous bushing
Risk of degraded comfort and wear

Method used

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  • Calculation method for the position of a synchronized dual clutch gearbox
  • Calculation method for the position of a synchronized dual clutch gearbox
  • Calculation method for the position of a synchronized dual clutch gearbox

Examples

Experimental program
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Embodiment Construction

[0041] figure 1 Shown is a powertrain comprising a heat engine 2 driving a dual clutch gearbox comprising a first input clutch 4 driving a first main shaft 6 and a second input clutch 8 driving a second main shaft 10, the second The spindle is hollow and receives the first spindle internally.

[0042] The gearbox includes a first layshaft 12 having an output gear 14 , a second layshaft 16 having an output gear 18 and a third layshaft 40 having an output gear 42 . Various output gears 14 , 18 , 42 mesh on ring gears of a differential not shown in order to distribute the movement to the drive wheels.

[0043] To form a first half box comprising odd ratios, the first countershaft 12 receives the movement of the first main shaft 6 through a first gear pair 20 to form a first transmission ratio I and through a third gear pair 22 receives the movement of the first main shaft to form the third transmission ratio III. The second countershaft 16 receives the movement of the first ma...

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PUM

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Abstract

Method for calculating the positions of specific points of sleeves for synchronising a gearbox, said gearbox comprising two half-boxes, each controlled by a clutch, wherein, in a preparation phase for each engaged gear ratio of a half-box, the method applies a predetermined engine torque set point curve and, over this set point curve, engages gear ratios of the other half-box, while measuring and storing positions of specific points (120, 122, 124) of the synchronisation sleeves when these engagement steps take place; subsequently, during running phases of the vehicle, the method calculates forecast positions for the specific points (120, 122, 124) by carrying out a comparison with the stored positions of the specific points (120, 122, 124).

Description

technical field [0001] The invention relates to a calculation method of the position of a specific point of a synchronizing sleeve of a dual clutch gearbox, and to a motor vehicle comprising means for implementing such a calculation method. Background technique [0002] A dual clutch gearbox consists of two concentric input shafts, each connected to the engine by a clutch. Each input shaft is connected to an output shaft by an assembly of even or odd rapports, which constitute a half-box. [0003] During travel in a gear ratio that transmits engine torque through its closed input clutch, the ratio can be engaged by leaving that clutch open and by moving the synchronizing sleeve to prepare for a higher or lower gear controlled by another clutch Ratio of meshing. [0004] The synchronization sleeve first performs the synchronization of the speed of the input shaft according to the speed of the vehicle, and then the engagement of the next ratio. The engine torque on the firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/28B60W10/04B60W10/113B60W30/19F16H61/688F16H63/50
CPCF16H61/2807F16H61/688F16H63/50F16H2061/283
Inventor 埃里克·舍费尔亚历山大·德尚
Owner PEZHO SITROEN AUTOMOBILS SA
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