*2.2. Transmission Model*

In this research, the two-mode hybrid transmission, 2MT70, was implemented as the hybrid electric powertrain system. The entire powertrain was composed of several main components, as shown in Figure 4, which included a simple planetary gear set, a compound planetary gear set, four sets of clutches, two electric motors/generators, an IC engine, and a battery [20].

**Figure 4.** Driveline configuration of two-mode hybrid power system.
