Back to results
US 7,479,080 B2Granted
Hybrid architecture incorporating three motor generators 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, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and up to three brakes. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse). One of the brakes enables series hybrid operation.
Claims14
An electrically variable transmission comprising:
- an input member to receive power from an engine;
- an output member;
- first, second and third motor/generators;
- first and second differential gear sets each having first, second and third members;
- said input member being continuously connected with a member of said first gear set, and said output member being continuously connected with a member of said second gear set;
- an interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set;
- a brake selectively connecting a member of said first or second gear set with a stationary member for enabling series hybrid reverse operation in the electrically variable transmission;
- said first motor/generator being continuously connected with a member of said first gear set;
- said second motor/generator being continuously connected with a member of said second gear set;
- said third motor/generator being continuously connected with another member of said first or second gear set;
- wherein said first, second and third motor/generators are operable in a coordinated fashion to provide said electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.
8 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 and second differential gear sets each having first, second and third members;
- said input member being continuously connected with a member of said first gear set, and said output member being continuously connected with a member of said second gear set;
- an interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set;
- a brake selectively connecting a member of said first or second gear set with a stationary member for enabling series hybrid reverse operation in the electrically variable transmission;
- said first, second and third motor/generators being continuously connected with members of said gear sets;
- wherein said first, second and third motor/generators are operable in a coordinated fashion to provide said electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.
6 more elements
Dependencies are inferred from the claim text.