DUAL-MOTOR POWER SYSTEM FOR VEHICLE

A dual-motor power system or a dual-motor hybrid power system for a vehicle comprises a first motor (1), a second motor (2), an intermediate shaft (13), a first gear set (7, 14) disposed between a first driving shaft (3) and the intermediate shaft (13). The first driving shaft (3) couples with the intermediate shaft (13) via the first gear set (7, 14). A second gear set (12, 15) is disposed between a second driving shaft (4) and the intermediate shaft (13). A single synchronizer (8) is disposed around the second driving shaft (4). The synchronizer (8) can be switched between a neutral position, a first-speed-ratio position, and a second-speed-ratio position. In the neutral position, the second driving shaft (4) is decoupled from the first (7, 14) and second (12, 15) gear sets. In the first-speed-ratio position, the synchronizer (8) couples the second driving shaft (4) with the intermediate shaft (13) via the first gear set (7, 14). In the second-speed-ratio position, the synchronizer (8) couples the second driving shaft (4) with the intermediate shaft (13) via the second gear set (12, 15).