Abstract
In this paper, a parallel HEV hybrid controller is developed in the MATLAB/Simulink environment. Using the driver commands, the battery state of charge and the engine map, a set of efficient rules has been developed to efficiently split the power between the engine and the motor. The steps are: 1) Estimate the instantaneous torque demand. 2) Using the estimated torque, the feedback signals and the engine map, find the best operating point and then split the power and let the engine work as near as possible to this efficient point, that can be done by controlling the motor (or generator). In the case of motor, let its torque supply the rest of the torque needed, while the engine works near its efficient point, or in the case of generator, let its torque supply an additional load to put the engine in an efficient point. 3) Control the motor to supply the transient torque demand, and keep the engine torque constant as long time as possible, this help to reduce fuel consumption. Finally simulations of a conventional and hybrid vehicle are performed using Simulink environment to check the controller and series of results will prove the effectiveness of the proposed controller and will show the advantage of hybrid powertrain over conventional one in term of fuel economy.
Highlights
The research of economized fuel vehicles has taken a huge interest in recent years due to the increased price of fuel and emission stringent laws
In this paper we first made simulations for conventional and parallel hybrid vehicle and we used the first category of power management strategy to make a model for the parallel HybridElectric Vehicles (HEV) hybrid controller, the goal of this hybrid controller is first to estimate the power demand using the driver commands, second the controller is tuned to get a suitable HEV performance and it efficiently splits the power between the diesel engine and the electric motor in order to improve the fuel economy over the conventional vehicle with the same characteristics
The various Engine Operating modes are selected based on the following set of rules: 1- If state of charge of the battery is greater than the lower limit (SOCmin) and power demand
Summary
The research of economized fuel vehicles has taken a huge interest in recent years due to the increased price of fuel and emission stringent laws. Load leveling can be achieved by adding the motor; which enables the engine to operate efficiently, independent from the road load regenerative braking allows the electric machine to capture part of the vehicle kinetic energy and store it in the battery. In this paper we first made simulations for conventional and parallel hybrid vehicle and we used the first category of power management strategy to make a model for the parallel HEV hybrid controller, the goal of this hybrid controller is first to estimate the power demand using the driver commands, second the controller is tuned to get a suitable HEV performance and it efficiently splits the power between the diesel engine and the electric motor in order to improve the fuel economy over the conventional vehicle with the same characteristics. The energy (Es) of the power sources (engine and motor, knowing that (We=Wm) at positive power demand) is described by: Page000192
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