By L Umanand, N V Chalapathi Rao, year - 2005
ABSTRACT : The fossil fuel source for the Internal Combustion Engine (ICE) vehicles are in a state of flux in the current Indian automobile arena. There are indications that the vehicles will be designed to use multiple fuel sources. The emission standards have resulted in the petrol ICE to be more efficient and less polluting due to improved fuel injection systems and catalytic converters to control emissions. The ICE engines used in automobiles are more efficient, have higher power to weight ratio and higher power to cost ratio as compared to the ICE-Genset systems that are available for non-mobile applications. These ICE Gensets have been used for series hybrid vehicles. The cost, size and emissions will not be acceptable. In this respect, the parallel hybrid may be the preferred system as it offers distinct advantages. The parallel hybrid electric propulsion system can be connected either to the non-driven axle or to the driven axle by designing an appropriate transmission. It would not be inappropriate to consider retrofitting electric propulsion to existing automobiles. This would lead to a seamless shift from the petrol vehicles to electric vehicles. This paper focuses on the retrofit model for parallel hybrids.