Planetary gear train of automatic transmission for vehicles

A technology of automatic transmission and planetary gear system, which is applied in vehicle gearboxes, vehicle components, gear transmissions, etc., can solve the problems of linearity deterioration of eight-speed automatic transmissions, and achieve reduced torque load, minimized operation, and reduced resistance The effect of loss

Active Publication Date: 2018-11-23
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, we have found that even though the ratio range may be raised above 9.0 steps, the eight-speed automatic transmission may become less linear in shifting gear ratios

Method used

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  • Planetary gear train of automatic transmission for vehicles
  • Planetary gear train of automatic transmission for vehicles
  • Planetary gear train of automatic transmission for vehicles

Examples

Experimental program
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Example

[0132] In the third embodiment, as in the first embodiment, when the second clutch C2 is operated, the second planetary gear set PG2 is integrally rotated.

[0133] Such a second embodiment differs from the first embodiment only in the arrangement of the second clutch C2, and shows the same connection relationship between the nine shafts TM1 to TM9, retaining the two clutches C1 and C3, and the three Brakes B1 to B3 thus provide the same operation.

[0134] As described above, the planetary gear trains of the first to third exemplary embodiments of the present invention utilize five planetary gear sets PG1 , PG2 , PG3 , PG4 and PG5 composed of three clutches C1 , C2 and C3 and the six engagement elements of the three brakes B1, B2 and B3, and thereby achieve ten forward speeds and at least one reverse speed.

[0135] In addition, a gear ratio range of at least 10.5 can be achieved to enhance the engine driving efficiency, and the linearity of the gear ratio of the shifting gears

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Abstract

The present disclosure provides a planetary gear train of an automatic transmission including: input and output shafts, first to fifth planetary gear sets respectively having first to third, fourth tosixth, seventh to ninth, tenth to twelfth, and thirteenth to fifteenth rotational elements, a first shaft connected with the second rotational element and the input shaft, a second shaft connected with the fourteenth rotational element and the output shaft, a third shaft connected with the ninth and thirteenth rotational elements, a fourth shaft connected with the tenth and fifteenth rotational elements, a fifth shaft connected with the third and seventh rotational elements, a sixth shaft connected with the sixth rotational element, a seventh shaft connected with the fifth, eighth, and eleventh rotational elements, an eighth shaft connected with the first and fourth rotational elements, and a ninth shaft connected with the twelfth rotational element.

Description

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Claims

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Application Information

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Owner HYUNDAI MOTOR CO LTD
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