A review on Hybrid Electric Vehicle and simulation on Hybrid Electric Vehicle Drivetrain Abstract

Simulation results

Figure 2. Vehicle speed Vs Motor speed
The simulation results we get at 200s step time are the speed of the vehicle and the motor speed as in figure 2. The motor speed is converted from rpm to kmph for comparing it with the vehicle speed. The speed of motor is increasing at 20s constantly with time. The motor powers the wheels of vehicle body that why the speed of the vehicle is also increased gradually with respect to the motor speed. At 70s to 140s the motor has stop accelerating and the vehicle speed is also getting constant, at the 120s the motor decreases its speed to same as the initial speed and the vehicle speed also gets deaccelerated.



Figure 3. A) Voltage B) Current C) Electrical Power

The figure 3 above represents the voltage, current and the electric power graph versus time plot. The voltage and current are calculated by ammeter and voltmeter at every time interval, present in battery circuit. The Electric power is measured by product the voltage and current input value, we get the power curve. And as in the graph the power increases at 20s due to acceleration by motor to 20 KW, then motor attends the stable speed so it consume power up to 60 KW and decreases at 140s due to deacceleration and then it shows negative power that means the engine shaft power is also transferred to the motor/generator to recharge its battery and after recharge it gains back 0 KW.

Figure 4. Engine Parameters A) Fuel consumption B) Power C) Throttle
The figure 4 above shows the engine parameters with respect to the time the A) is the fuel consumption as u can see the fuel consumption is increased at 20s up to 0.0006 Kg/s because the vehicle wheels are powered by motor so there is less fuel required than actual amount to accelerate the vehicle by the engine only and then decreases again back to around 0.0002 Kg/s for maintain the vehicle speed. B) is the Power of the engine which is also increased during the acceleration is slightly increased due to some increase of speed of the shaft. And after 140s when the motor stops powering the drive shaft, the power required by engine is more to charge the battery by supplying rotational power to the motor and the wheels. C) is the throttle graph which is made constant value 0.11.