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US 7,479,082 B2Granted
Hybrid powertrain having three interconnecting members and brakes
AssigneeGM Global Technology Operations LLC
InventorPatrick B. Usoro
Life of this patent
Estimating the term…
Abstract
The electrically variable transmission family of the present invention provides low-content, electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and at least one brake. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speed ratios (including reverse). One of the brakes enables series hybrid operation.
Claims18
An electrically variable transmission comprising:
- an input member to receive power from an engine;
- an output member;
- first, second and third motor/generators;
- first, second and third differential gear sets each having first, second and third members;
- said input member being continuously connected with a member of said first, second or third gear set, and said output member being continuously connected with another member of said first, second or third gear set;
- a first interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set;
- a second interconnecting member continuously connecting said second member of said first gear set with said second member of said second gear set;
- a third interconnecting member continuously connecting said third member of said second gear set with said first member of said third gear set;
- a first brake selectively connecting at least one member of said first, second or third gear set with a stationary member;
- said first motor/generator being continuously connected with a member of said first or second gear set;
- said second motor/generator being continuously connected with a member of said second or third gear set;
- said third motor/generator being continuously connected with another member of said first or third gear set;
- wherein said brake and first, second and third motor/generators are operable in a coordinated fashion to provide an electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.
10 more elements
An electrically variable transmission comprising:
- an input member to receive power from an engine;
- an output member;
- first, second and third motor/generators;
- first, second and third differential gear sets each having first, second and third members;
- said input member being continuously connected with a member of said first, second or third gear set, and said output member being continuously connected with another member of said first, second or third gear set;
- a first interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set;
- a second interconnecting member continuously connecting said second member of said first gear set with said second member of said second gear set;
- a third interconnecting member continuously connecting said third member of said second gear set with said first member of said third gear set;
- a brake selectively connecting at least one member of said first, second or third gear set with a stationary member;
- said first, second and third motor/generators being continuously connected with members of said gear sets;
- wherein said brake and first, second and third motor/generators are operable in a coordinated fashion to provide an electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.
8 more elements
Dependencies are inferred from the claim text.