US 2005/0037889 A1 · Automatic transmission

Abstract

An automatic transmission including a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member and a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element. The first element is capable of being connected to the decelerated rotating member via a third clutch and capable of being stopped from rotating by a first brake, the second element is capable of being stopped from rotating by a second brake, the third element is capable of being stopped from rotating by a third brake, with either the second element or the third element capable of being connected to the input shaft via a second clutch, the fourth element is connected to an output shaft, the fifth element is capable of being connected to the decelerated rotating member via a first clutch, and at least seven forward speed ratios can be established.

Claims17

Dependent claims

An automatic transmission comprising:

a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member;
and
a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element, wherein:
the first element is capable of being connected to the decelerated rotating member via a third clutch and capable of being stopped from rotating by a first brake,
the second element is capable of being stopped from rotating by a second brake,
the third element is capable of being stopped from rotating by a third brake, with either the second element or the third element capable of being connected to the input shaft via a second clutch,
the fourth element is connected to an output shaft,
the fifth element is capable of being connected to the decelerated rotating member via a first clutch, and
at least seven forward speed ratios can be established.

6 more elements

An automatic transmission comprising:

a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member;
and
a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element and a fifth element that each correspond in order to five elements sequentially aligned at intervals corresponding to gear ratios in a velocity diagram, wherein
the first element is capable of being connected to the decelerated rotating member via a third clutch and capable of being stopped from rotation by a first brake,
the second element is capable of being connected to the input shaft via a second clutch and capable of being stopped from rotation by a second brake,
the third element is capable of being stopped from rotation by a third brake,
the fourth element is connected to an output shaft, and
the fifth element is capable of being connected to the decelerated rotating member via a first clutch.

5 more elements

An automatic transmission comprising:

a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member;
and
a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element that each correspond in order to five elements sequentially aligned at intervals corresponding to gear ratios in a velocity diagram, wherein
the first element is capable of being connected to the decelerated rotating member via a third clutch and capable of being stopped from rotation by a first brake,
the second element is capable of being stopped from rotation by a second brake,
the third element is capable of being connected to the input shaft via a second clutch and capable of being stopped from rotation by a third brake,
the fourth element is connected to an output shaft, and
the fifth element is capable of being connected to the decelerated rotating member via a first clutch.

5 more elements

Dependencies are inferred from the claim text.

Automatic transmission

Life of this patent

Automatic transmission

Life of this patent

Abstract

Claims17