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This paper presents the results of tests using a prototype pump-integrated port fuel injector that is designed for small gasoline engines. The unique construction of the injector eliminates the need for a separate feed pump. The device is intended as a solution to meet the upcoming emission norms similar to Euro 6 standards, to be implemented in Asian countries. In particular, the Indian two-wheeler market which produces around 20 million vehicles annually [1], migrates to Bharat Stage VI (BS VI) emission standards in the year 2020. This market is largely cost-driven and currently most of the motorcycles use carburettors as fuelling systems. It is expected that the adoption of port fuel injection would be inevitable to meet the BS VI emission norms. To minimize the increase in cost due to such a change, a new injector is developed, which integrates the fuel pump within the injector, making the system simple and compact, while calling for no change in the fuel tank.

In testing of engines in engine test bed, the engine is connected to dynamometer through a solid shaft. The shaft connecting engine and dynamometer can have the problems of torsional vibrations, whirling of shafts and vibration of engine and dynamometer. The frequently encountered problem is resonance in torsional vibration leading to excessive vibration of the coupling shaft. This vibration can lead to the catastrophic failure of the shaft. This paper deals in designing of shaft with right stiffness and dampening. This involves theoretical calculation of resonance frequency of torsional vibration and measurement of shaft and coupling stiffness.

This paper deals with the development of rotary fuel injection pump for a direct injection tractor engine to meet US Tier - I emission norms. The development involves optimisation of injection parameters such as injection rate, timing, injection pressures, nozzle hole geometry and use of in-built features provided by rotary pump technology. The influence of above injection parameters on engine performance and results obtained are discussed in this paper. The optimised rotary fuel injection system meets comfortably the US Tier - I emission norms.