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US 8,556,758 B1Granted
Hybrid powertrain
AssigneeGM Global Technology Operations LLC
InventorsNorman Schoenek, Elizabeth I. Wooden, Shawn H Swales
Life of this patent
Estimating the term…
Abstract
A transmission includes a first planetary gearset and a second planetary gearset, each having a respective first planetary member, a respective second planetary member, and a respective third planetary member. The planetary members of the first planetary gearset are coaxially disposed on, and selectively rotatable about, a first axis. The planetary members of the second planetary gearset are coaxially disposed on, and selectively rotatable about, a second axis. An axis transfer mechanism including meshing gears transmits torque between the first and second planetary gearsets.
Claims12
A transmission comprising:
- an input member;
- an output member;
- a first motor/generator having a first rotor;
- a second motor/generator having a second rotor;
- a first planetary gearset, a second planetary gearset, and a third planetary gearset each having a respective first planetary member, a respective second planetary member, and a respective third planetary member;
- said first, second, and third planetary members of the first planetary gearset, said input member, and said first rotor being coaxially disposed on, and selectively rotatable about, a first axis;
- said first, second, and third planetary members of the second planetary gearset and said first, second, and third planetary members of the third planetary gearset being coaxially disposed on, and selectively rotatable about, a second axis;
- said second rotor being disposed on, and selectively rotatable about, a third axis;
- said output member being disposed on, and selectively rotatably about, a fourth axis;
- a first axis transfer mechanism operatively interconnecting the second planetary gearset and the first planetary gearset and configured to transmit torque therebetween;
- a second axis transfer mechanism operatively interconnecting the second rotor and the third planetary gearset and configured to transmit torque therebetween;
- and
- a third axis transfer mechanism operatively interconnecting the first planetary gearset, the third planetary gearset, and the output member and configured to transmit torque therebetween.
10 more elements
A transmission comprising:
- an output member;
- a first planetary gearset and a second planetary each having a respective first planetary member, a respective second planetary member, and a respective third planetary member;
- said planetary members of the first planetary gearset being coaxially disposed on, and selectively rotatable about, a first axis;
- said planetary members of the second planetary gearset being coaxially disposed on, and selectively rotatable about, a second axis;
- said output member being selectively rotatable about a third axis;
- at least one axis transfer mechanism operatively interconnecting one of the planetary members of the first planetary gearset, one of the members of the second planetary gearset, and the output member;
- wherein said at least one axis transfer mechanism is configured such that torque is transmissible from the first planetary gearset and from the second planetary gearset to the output member through said at least one axis transfer mechanism;
- wherein said at least one axis transfer mechanism includes a first axis transfer mechanism and a second axis transfer mechanism;
- wherein the first axis transfer mechanism includes a first axis transfer gear member, a second axis transfer gear member meshingly engaged with the first axis transfer gear member, and a third axis transfer gear member meshingly engaged with the second axis transfer gear member;
- wherein the second axis transfer mechanism includes a fourth axis transfer gear member operatively connected to the first axis transfer gear member for unitary rotation therewith, a fifth axis transfer gear member meshingly engaged with the fourth axis transfer gear member, a sixth axis transfer gear member operatively connected to the fifth axis transfer gear member for unitary rotation therewith, and a seventh axis transfer gear member meshingly engaged with the sixth axis transfer gear member and operatively connected to the output member for unitary rotation therewith.
7 more elements
Dependencies are inferred from the claim text.