TWO-SPEED CLUTCH Russian patent published in 2014 - IPC B60K23/00 

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to optimization of output shaft acceleration. Differential gear comprises one input and two outputs transmitting different torques and engaged with driven shaft, one directly while another one via slip clutch with the housing. Said clutch is designed to decelerate differential gear second output for reduction of driven shaft rpm and increase in driven torque. Second output can be engaged with driven shaft via slip clutch of whatever known type which partially locks said reduction gear to accelerate the entire mechanism along with driven shaft that causes the decrease in gear ratio from maximum whereat torque is transferred via transmission only to unity when transmission elements do not run while the entire mechanism revolves.

EFFECT: simplified control over acceleration, simplified design, lower power losses.

2 cl, 1 dwg