Patent ID: 7226379

Claim:
A transmission comprising: an input shaft connected to an engine; two input gear trains arranged on said input shaft; a first intermediate shaft; two first transmission gear trains having gear ratios different from each other, connected with or disconnected from said first intermediate shaft with a first dog clutch, meshing with said input gear trains, respectively; a second intermediate shaft; two second transmission gear trains having gear ratios different from each other, connected with or disconnected from said second intermediate shaft with a second dog clutch, meshing with said two input gear trains, respectively; a third transmission gear train arranged on said first intermediate shaft and connected with or disconnected from said first intermediate shaft; a fourth transmission gear train arranged on said second intermediate shaft and connected with or disconnected from said second intermediate shaft; a driven gear train meshing with said third and fourth transmission gear trains an output shaft commonly connected to said driven gear train; a differential gear box connected with said first and second intermediate shafts; and a motor operatively connected to said differential gear box to apply torque relatively to said first and second intermediate shafts.