Search Results

This paper describes the strategies used in optimization of an existing three-wheeler Liquefied Petroleum Gas (LPG) vehicle variant for improving its fuel consumption, basic performance and meeting BS-III emission norms. The major technical areas targeted were i) Redesigning of the gear ratios so that the vehicle predominantly runs in low rpm band i.e. between Peak torque and Peak power which is best SFC (Specific Fuel Consumption) region. ii) Optimization of intake system for LPG fuel which involves different combinations of air reducers and mixer ventury throat diameters with varying hole sizes and numbers. iii) Improving LPG kit from that used in the existing model to a modified one better suited for the smaller displacement engine on the vehicle. After rigorous work on the chassis dynamometer and various trials on road the optimized vehicle managed to deliver a 20% plus improvement in fuel consumption helping close the gap considerably to competitors.

This paper describes the strategies to improve fuel efficiency and reduce CO2 emissions for the three wheeler vehicle fueled with auto CNG In today's scenario, it is very much important that the vehicle should have high fuel efficiency, where fuel economy is USP i.e. Unique selling features. The improvement in fuel efficiency will lead to reduce CO2 emission. In India, CNG is abundantly available and without treatment it can be used for vehicle application. This was achieved by redesigning gear ratios, vehicle fuel system and engine intake system. The main aim was to have vehicle should run in all the time in low engine SFC band i.e. Specific fuel consumption After several technical calculations and then actual physical testing, improvement confirmed on 5 proto vehicles in R&D was 23 % in City and IDC and 22 % on Highway respectively. The power found improved by 2 %. CO2 and other emission components i.e. CO, HC, and NOx found to reduce by 18-32 %.