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This paper describes the development of a prototype parallel hybrid electric vehicle (HEV). Parallel configuration of HEV is achieved through an epi-cyclic transmission. A single stage epi-cyclic transmission is designed, developed and integrated into a vehicle equipped with conventional manual transmission. An internal combustion diesel engine and an electric motor are connected through epi-cyclic transmission to the propeller shaft of the vehicle. This parallel HEV provides five basic modes of operation namely engine mode, electric mode, power mode, engine/charge mode and regenerative braking mode. Each of these modes is obtained with the help of an electromagnetic clutch and brake integrated in the epi-cyclic gearbox. The selection of a mode depends upon the requirements of the vehicle. A feasible clutching logic and control strategy of parallel HEV is developed for operation of the vehicle in city, highway and high power requirement conditions.

Hybrid Electric Vehicles (HEV) is well accepted short-term and medium-term response to the problems of rising crude prices and technical challenges of the new hydrogen and battery technologies. This paper describes the performance of a novel HEV transmission system that overcomes the deficiencies of existing solutions and gives a better, real-time implementable, fault-tolerant, simple yet future-worthy and real-time solution. The performance of the system is evaluated using the ADVISOR software. Sanity checks are performed to see cycle to cycle performance and operating points of the ICE engine and the motor / generator.

Use of microprocessor-based controllers in place of traditional governor-based controllers for diesel engines is motivated by the requirement of meeting the increasingly stringent legislations on exhaust emissions and fuel economy. Such controllers can also give improved transient performance. In this paper a fourth order nonlinear mean value model of a 600 HP turbocharged diesel engine is developed for the controller design. Differential equations for various subsystems have been derived using first principles, experimental data and characteristic maps. The model is implemented in MATLAB™ and Simulink™ environment for simulation and controller design. The model is generic and can be modified with a little effort for other heavy-duty turbocharged diesel engines. The nonlinear model is linearized at sixteen operating points covering wide operating range. These models are reduced to second and first order models using a balanced realization.