Patent · US Active

Two mode electrically variable transmission with equal forward and reverse input-split modal and fixed ratio performance

US7338401B2 · kind B2 · utility

50Cited by

6References

20Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Donald Klemen · Carmel, US
Michael R. Schmidt · Carmel, US
Brendan M. Conlon · Rochester Hills, US

Key dates

Filing date	Jul 22, 2005
Grant date	Mar 4, 2008
Priority date	—
Expiry date	Jun 5, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S903/911
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

An electrically variable transmission includes a power source, three differential gear sets, first and second motor/generators each connected to at least one of the gear sets, and torque-transmitting mechanisms. An input member transfers power from the power source through the differential gear sets to an output member. The torque-transmitting mechanisms are selectively engageable to provide an input-split first electrically variable mode having equal forward and reverse speed ratios for given input speeds and to provide substantially equal fixed forward and reverse speed ratios.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.