Single range electrically variable transmission with lockup clutch and method of operation
A single range, electrically variable transmission (EVT) is provided with a lockup clutch that reduces motor power requirements. When applied, the lockup clutch allows engine torque to be transmitted directly to the output without the necessity of a motor/generator supplying reaction torque. With the lockup clutch applied, the transmission operates with zero electro-mechanical power flow at a fixed mechanical ratio, thus mitigating the power peak which occurs through the motor/generators. Input-split, output-split, and compound-split transmissions are disclosed. A method of operating an EVT with a lockup clutch is also provided.
General Motors Corporation
B B F F B F F B B B Y Y
B60K B60K F16H F16H B60K F16H F16H B60K B60K B60K Y10S Y02T
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Larry T. Donald Michael R. Alan G.
Nitz Klemen Schmidt Holmes