Power Flow Control in Parallel Hybrid

The parallel hybrid system has four modes of operation. These four modes of operation are

• • Mode 1: During start up or full throttle acceleration (Figure 2a) ; both the ICE and the EM share the required power to propel the vehicle. Typically, the relative distribution between the ICE and electric motor is 80-20%.

• Mode 2: During normal driving (Figure 2b), the required traction power is supplied by the ICE only and the EM remains in off mode.

• Mode 3: During braking or deceleration (Figure 2c), the EM acts as a generator to charge the battery via the power converter.

• Mode 4: Under light load condition (Figure 2d), the traction power is delivered by the ICE and the ICE also charges the battery via the EM.

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