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Planetary gear train of automatic transmission for vehicles

  • US 10,012,292 B2
  • Filed: 09/29/2016
  • Issued: 07/03/2018
  • Est. Priority Date: 12/02/2015
  • Status: Active Grant
First Claim
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1. A planetary gear train of an automatic transmission for a vehicle, comprising:

  • an input shaft for receiving an engine torque;

    an output shaft for outputting a shifted torque;

    a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element;

    a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element;

    a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element;

    a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element;

    six control elements, each of which selectively connects at least one of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, and twelfth rotation elements with the input shaft or selectively connects at least one of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, and twelfth rotation elements with a transmission housing;

    a first connecting member fixedly connected with the first rotation element and fixedly connected with the transmission housing;

    a second connecting member fixedly connected with the second rotation element and the seventh rotation element and selectively connectable with the transmission housing to act as a selective fixed element;

    a third connecting member fixedly connected with the third rotation element and the sixth rotation element, and selectively connectable with the input shaft to act as a selective input element;

    a fourth connecting member fixedly connected with the fourth rotation element and fixedly and continuously connected with the input shaft to act as an input element;

    a fifth connecting member fixedly connected with the fifth rotation element and selectively connectable with the transmission housing to act as a selective fixed element;

    a sixth connecting member fixedly and continuously connected with the eighth rotation element and the twelfth rotation element, selectively connectable with the input shaft to act as a selective input element, and selectively connectable with the transmission housing to act as a selective fixed element;

    a seventh connecting member fixedly connected with the ninth rotation element and the eleventh rotation element, and fixedly connected with the output shaft to act as an output element; and

    an eighth connecting member fixedly connected with the tenth rotation element, and selectively connectable with the input shaft to act as a selective input element.

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