Performance and Emission Characterization of Adjustable Cylinder Head Type Variable Compression Ratio in Two-Stroke SI Engine

Abstract

A lot of technologies have been introduced to retain the petrol engines which exhibit a lot of drawbacks based on emissions and knocking. Variable compression ratio (VCR) technology is applied in the line of SI engines for a long period to give back the standards. This paper is going to analyze and experiment on a commercially available type of VCR technologies. The investigation can provide a great method of varying the compression ratio that is put forth, practically analyzed, and previewed with a change from the previous paper and taken to an account to restrict the compression ratio of +/-1.5. In this analysis, we use the same technology as commercially used two-stroke engines but the clearance volume is changed and introduces a metallic bung on the burning chamber. We have performed the test by varying the compression ratios to more or less than two from the original compression ratio. At lesser weight conditions, a low compression ratio is maintained throughout the experiment to boost up the turbocharger to get a better amount of volumetric efficiency without any trouble. The engine is tested at various compression ratios for the performance study and emissions from the power source at various load conditions. While adopting this method in commercial, we can achieve a potentially higher fuel economy, more power, lower emission compared to other available technologies in ongoing research.