US 12,007,005 B2Granted

Multi-speed planetary transmission

AssigneeAllison Transmission, Inc.

InventorsNayan Patel, Jorge F. Briceno, Conrad Rockey

Life of this patent

Estimating the term…

Loading patent…

Abstract

A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least eighteen forward speed ratios and at least two reverse speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have five planetary gearsets and eight selective couplers. The eight selective couplers may include three clutches and five brakes.

Claims24

Dependent claims

A transmission comprising:

at least one stationary member;
an input member rotatable relative to the at least one stationary member;
a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a first gearset component, a second gearset component, and a third gearset component, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset, the input member is fixedly coupled to only the first gearset component of the first planetary gearset of the plurality of planetary gearsets, the first gearset component of the first planetary gearset is a sun gear;
an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member, the output member is fixedly coupled to only the fifth planetary gearset of the plurality of planetary gearsets;
and
a plurality of selective couplers, wherein the plurality of selective couplers includes a first number of clutches and a second number of brakes, wherein the second number is greater than the first number, and one of the plurality of selective couplers selectively couples the fourth planetary gearset to the fifth planetary gearset independent of the output member, wherein the plurality of selective couplers includes a first selective coupler which, when engaged, fixedly couples the input member to the third planetary gearset of the plurality of planetary gearsets.

3 more elements

A transmission comprising:

at least one stationary member;
an input member rotatable relative to the at least one stationary member;
a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a first gearset component, a second gearset component, and a third gearset component, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset, the input member is fixedly coupled to the first gearset component of the first planetary gearset;
an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member, the output member is fixedly coupled to the second gearset component of the fifth planetary gearset;
a first interconnector which fixedly couples the second gearset component of the first planetary gearset, the second gearset component of the second planetary gearset, and the third gearset component of the third planetary gearset together;
a second interconnector which fixedly couples the third gearset component of the first planetary gearset and the first gearset component of the second planetary gearset together;
a third interconnector which fixedly couples the second gearset component of the third planetary gearset and the third gearset component of the fourth planetary gearset together;
a fourth interconnector which fixedly couples the first gearset component of the third planetary gearset and the first planetary gearset component of the fourth planetary gearset together;
a fifth interconnector which fixedly couples the second gearset component of the fourth planetary gearset and the first gearset component of the fifth planetary gearset together;
and
a plurality of selective couplers, wherein the plurality of selective couplers includes:
a first selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the first gearset component of the third planetary gearset and the first gearset component of the fourth planetary gearset;
a second selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the second gearset component of the third planetary gearset and the third gearset component of the fourth planetary gearset;
a third selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset and the first gearset component of the second planetary gearset to the at least one stationary member;
a fourth selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset, the second gearset component of the second planetary gearset, and the third gearset component of the third planetary gearset to the at least one stationary member;
a fifth selective coupler which, when engaged, fixedly couples the second gearset component of the third planetary gearset and the third gearset component of the fourth planetary gearset to the at least one stationary member;
a sixth selective coupler which, when engaged, fixedly couples the third gearset component of the second planetary gearset to the at least one stationary member;
a seventh selective coupler which, when engaged, fixedly couples the second gearset component of the fourth planetary gearset and the first gearset component of the fifth planetary gearset to the second gearset component of the fifth planetary gearset;
and
an eighth selective coupler which, when engaged, fixedly couples the third gearset component of the fifth planetary gearset to the at least one stationary member.

17 more elements

A transmission comprising:

at least one stationary member;
an input member rotatable relative to the at least one stationary member;
a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a first gearset component, a second gearset component, and a third gearset component, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset, the input member is fixedly coupled to only the first planetary gearset of the plurality of planetary gearsets;
an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member, the output member is fixedly coupled to only the fifth planetary gearset of the plurality of planetary gearsets;
and
a plurality of selective couplers, wherein the plurality of selective couplers includes a first number of clutches and a second number of brakes, wherein the second number is greater than the first number, and one of the plurality of selective couplers selectively couples the fourth planetary gearset to the fifth planetary gearset independent of the output member, wherein the plurality of selective couplers includes:
a first selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the first gearset component of the third planetary gearset and the first gearset component of the fourth planetary gearset;
a second selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the second gearset component of the third planetary gearset and the third gearset component of the fourth planetary gearset;
a third selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset and the first gearset component of the second planetary gearset to the at least one stationary member;
a fourth selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset, the second gearset component of the second planetary gearset, and the third gearset component of the third planetary gearset to the at least one stationary member;
a fifth selective coupler which, when engaged, fixedly couples the second gearset component of the third planetary gearset and the third gearset component of the fourth planetary gearset to the at least one stationary member;
a sixth selective coupler which, when engaged, fixedly couples the third gearset component of the second planetary gearset to the at least one stationary member;
a seventh selective coupler which, when engaged, fixedly couples the second gearset component of the fourth planetary gearset and the first gearset component of the fifth planetary gearset to the second gearset component of the fifth planetary gearset;
and
an eighth selective coupler which, when engaged, fixedly couples the third gearset component of the fifth planetary gearset to the at least one stationary member.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/802,191Filed 18 Feb 2021 · us provisional application
Priority: 9 Mar 2020
Published: US 2023/0358297 A19 Nov 2023
Granted: 11 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F16H 3/66
Gearings having three or more central gears: composed of a number of gear trains without drive passing from one train to another
F16H 2200/0078
Characterised by the number of forward speeds: the gear ratio comprising twelve or more forward speeds
F16H 2200/0086
Characterised by the number of reverse speeds: the gear ratios comprising two reverse speeds
F16H 2200/2015
Characterised by the number of sets of orbital gears: with five sets of orbital gears

Family

Application62/986,859Us provisional application · filed 9 Mar 2020
US 2023/0358297 A1Pre-grant publication · published 9 Nov 2023
US 12,007,005 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key