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The development of a computer simulation model for an automotive turbocharged multi cylinder spark ignition engine for gasoline and methanol operations is described in this paper. The model illustrates the simulation of the thermodynamic cycle comprising of compression, combustion, expansion, exhaust and intake processes. The scheme employed for matching the turbocharger and engine is also highlighted. The computed data of the above model is validated with the available experimental data. The model predicts the brake power developed by the engine, brake specific energy consumption, the nitrogen oxide and carbon monoxide emissions for both the gasoline and methanol operations, corresponding to the original and improved manifold design configurations.

In the present paper, investigations relating to the development of an electronic in-cylinder injection system for a two stroke spark ignition are briefly described. These include the major components used including the laboratory developed manual electronic control system. Preliminary studies have shown an improved performance of the in-cylinder injection system as compared to the conventional carburetor system.

Performance, combustion and emissions investigations relating to the use of Ethanol 5% + Methanol in a spark ignition engine are described in this paper. The engine used for experimental purpose is Enfield motorcycle engine of 13.4 Kw (18 hp). A new online multi liquid fuel mixing system has been developed for perfect mixing [1] and hence found better for investigating effects of various Ethanols 5%+ Methanol Gasoline blends (E5M5, E5M10, E5M15, E5M20) hence enhances engine performance and reduction in exhaust emissions could experimentally results. Performance tests conducted with this system and showed considerable performance improvement in power output and in thermal efficiency, as well as substantial reduction in BSFC, HC, CO and NOx emissions

Performance, combustion and emissions investigations relating to the use of Methanol 5% + Ethanol blends in a spark ignition engine are described in this paper. The engine used for experimental purpose is Enfield motorcycle engine of 13.4 Kw (18 hp). A new online multi liquid fuel mixing system has been developed for perfect mixing [1] and hence found better for investigating effects of various Methanol 5%+ Ethanol Gasoline blends (M5E5, M5E10, M5E15, M5E20) hence enhances engine performance and reduction in exhaust emissions could experimentally results. Performance tests conducted with this system and showed considerable performance improvement in power output and in thermal efficiency, as well as substantial reduction in BSFC, HC, CO and NOx emissions.

A newly designed and developed variable valve lift and timing mechanism is reported in this paper which makes it possible to improve the performance of a single cylinder gasoline engine. This mechanism which was applied to a conventional push-rod, rocker-arm engine, consists of two stages namely phase changer and cam lift duration changer. Consequently valve lift, duration and cam phasing were changed in accordance with engine speed and load. Results of the experiments show that the mechanism functions satisfactory and significant improvements were achieved in power output, fuel consumption, idling quality and exhaust emissions.