Transmission for vehicles
AssigneesHyundai Motor Company, Kia Motor Corporation
InventorsSeong Wook Ji, Seong Wook Hwang, Hyun Sik Kwon, Ki Tae Kim, Won Min Cho, Jae Chang Kook
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Abstract
A vehicle transmission realizes speed change via variation in rotation speed and direction by selective control operation using combinations of six friction elements and a plurality of rotating elements of four planetary gear devices, and enables vehicle driving by realizing at least ten stage gear ratios for forward movement and at least one stage gear ratio for backward movement based on different speeds, wherein the vehicle transmission may increase fuel efficiency and power performance resulting from the multiple stages of the transmission.
Claims8
A vehicle transmission apparatus comprising a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device,
- wherein the first planetary gear device includes:
- a first rotating element which is fixedly connected to an input shaft and is fixedly connected to a second rotating element of the second planetary gear device;
- a second rotating element that selectively operates as a stationary element due to a first friction element, is selectively connectable to a first rotating element of the second planetary gear device via a second friction element and is selectively connectable to a third rotating element of the second planetary gear device via a third friction element;
- and
- a third rotating element which is selectively connectable to a second rotating element of the third planetary gear device via a fourth friction element and is selectively connectable to a first rotating element of the third planetary gear device via a fifth friction element,
- wherein the first rotating element of the second planetary gear device is fixedly connected to a third rotating element of the fourth planetary gear device,
- wherein the first rotating element of the third planetary gear device selectively operates as a stationary element due to a sixth friction element;
- wherein the second rotating element of the third planetary gear device is fixedly connected to an output shaft;
- and
- wherein a third rotating element of the third planetary gear device is fixedly connected to a second rotating element of the fourth planetary gear device, and
- wherein the fourth planetary gear device includes a first rotating element fixedly connected to the input shaft.
A vehicle transmission apparatus comprising a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device, the transmission apparatus further comprising:
- an input shaft fixedly connected to a first rotating element of the first planetary gear device, a second rotating element of the second planetary gear device, and a first rotating element of the fourth planetary gear device;
- a first shaft fixedly connected to a first brake, a second rotating element of the first planetary gear device, a second clutch, and a third clutch;
- a second shaft fixedly connected to a third rotating element of the first planetary gear device, a first clutch, and a fourth clutch;
- a third shaft fixedly connected to the third clutch, a first rotating element of the second planetary gear device, and a third rotating element of the fourth planetary gear device;
- a fourth shaft fixedly connected to a third rotating element of the second planetary gear device and the second clutch;
- a fifth shaft fixedly connected to a second brake, the fourth clutch, and a first rotating element of the third planetary gear device;
- a sixth shaft fixedly connected to a third rotating element of the third planetary gear device and a second rotating element of the fourth planetary gear device;
- and
- an output shaft fixedly connected to the first clutch and a second rotating element of the third planetary gear device.
Dependencies are inferred from the claim text.