US 8,801,562 B2 · Multi-speed automatic transmission with fast reverse

Abstract

The present disclosure provides an automatic transmission having an input adapted to couple to a torque-generating mechanism and an output coupled to the input. The transmission also includes a first rotating torque-transferring mechanism disposed along a first torque path and coupled to the input. A second rotating torque-transferring mechanism is disposed along a second torque path and is coupled to the input independent of the first torque-transferring mechanism. The transmission includes a plurality of stationary torque-transferring mechanisms, each of which is disposed between the input and output. The transmission includes a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset, where each gearset includes a sun gear, a ring gear, and a carrier assembly. Moreover, the ring gear of the third planetary gearset is coupled to the carrier assembly of the second planetary gearset and the carrier assembly of the fourth planetary gearset.

Claims20

Dependent claims

An automatic transmission, comprising:

an input adapted to couple to a torque-generating mechanism;
an output coupled to the input;
a first rotating torque-transferring mechanism disposed along a first torque path, the first rotating torque-transferring mechanism being coupled to the input;
a second rotating torque-transferring mechanism disposed along a second torque path, the second rotating torque-transferring mechanism being coupled to the input independent of the first torque-transferring mechanism;
a first stationary torque-transferring mechanism, a second stationary torque-transferring mechanism, a third stationary torque-transferring mechanism, and a fourth stationary torque-transferring mechanism, each of the stationary torque-transferring mechanisms being disposed between the input and the output;
and
a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset, where each planetary gearset includes a sun gear, a ring gear, and a carrier assembly;
wherein, the ring gear of the third planetary gearset is coupled to the carrier assembly of the second planetary gearset and the carrier assembly of the fourth planetary gearset.

5 more elements

A gear scheme for an automatic transmission, comprising:

a transmission input and a transmission output, the input adapted to be coupled to a torque-generating mechanism;
a first rotating torque-transferring mechanism and a second rotating torque-transferring mechanism, each being independently coupled to the transmission input;
a first planetary gearset coupled to the first rotating torque-transferring mechanism, the first planetary gearset being coupled to a first stationary torque-transferring mechanism;
a second planetary gearset coupled to the first planetary gearset and the first rotating torque-transferring mechanism, the second planetary gearset being coupled to a second stationary torque-transferring mechanism;
a third planetary gearset coupled to the second rotating torque-transferring mechanism and the transmission output, the third planetary gearset being coupled to a third stationary torque-transferring mechanism;
and
a fourth planetary gearset coupled to the third planetary gearset and a fourth stationary torque-transferring mechanism;
wherein, the fourth planetary gearset includes a sun gear, a ring gear, and a carrier assembly, the ring gear being coupled to the fourth stationary torque-transferring mechanism.

5 more elements

Dependencies are inferred from the claim text.

Multi-speed automatic transmission with fast reverse

Life of this patent

Multi-speed automatic transmission with fast reverse

Life of this patent

Abstract

Claims20