Patent ID: 7867124
Filing Date: 2011-01-11
Classification: B60K,B60L,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
1. An electrically-variable transmission (EVT) comprising: an input member configured for operative interconnection with an engine; an output member; a stationary member; first and second motor/generators; a planetary gear set representable by a first three-node lever having a first, a second, and a third node; and a first and a second torque-transmitting mechanism that are selectively engagable alone or in different combinations for establishing an electric-only mode, a series mode, an output split mode, and a neutral mode, wherein said first torque-transmitting mechanism is selectively engagable to connect said third node to said stationary member, and wherein said second torque-transmitting mechanism is selectively engagable to connect said first motor/generator to said third node; wherein one of said first and said second torque-transmitting mechanisms is selectively disengagable to disconnect said engine from said third node to enable start of said engine when said engine is disconnected from said EVT; and wherein engagement of said first torque-transmitting mechanism establishes said electric-only mode and said series mode, engagement of said second torque-transmitting mechanism establishes said output split mode, and disengagement of said first and said second torque-transmitting mechanisms establishes said neutral mode.