1. Hybrid Electric Vehicles
By: Henry Phung
CalPoly Pomona, Mechanical Engineer

2. Comparison

3. Parallel Hybrid
Both IC Engine and Electric engine is attached to the drivetrain
Computers and transmissions allow the two to work in sync
Smaller batteries
Low power situations allowed IC to recharge batteries
IC Engine RPMs vary
More efficient at cruising

4. Series Hybrid Movement only by electric motor
IC engine charges batteries and provides power for electric motor
IC Engine is allowed to operated at optimum RPM
Smaller IC engine, larger batteries/electric motor

5. Series Continued
When large amounts of power is needed the electric motor will draw energy from both the IC engine and the batteries
More efficient with stop and go
Separate motors can be used for each drive wheel to eliminate chains and differentials
Heavier but will perform as a LSD

6. Series/Parallel Combined
Combined is better than either one separate
Stop and go the car can act as a series
Cruising the car can act as a parallel

7. Regenerative Braking
While braking the batteries or capacitors can be charged
Electric motor is reversed turning it into a generator