Performance and Emission characteristics of Digital Twin Spark Ignition Engine working on Gasoline – Methanol Blends

The high knock resistant and low emission make the methanol a best suitable alternative for gasoline. High octane number and heat of vaporization allows to run at higher temperature. The effect of methanol and gasoline blends as well as neat methanol on engine performance and emission parameters have been experimentally investigated. A four stroke petrol engine with twin spark ignition engine is used for this experimental study. The work is carried out at different loads for the blends such as M0, M20, M40, M60, M80 and M100 on mass basis. The spark plugs are situated in the engine cylinder in opposite direction. The spark produced by two spark plugs at different intervals such as 32o BTDC - 28o BTDC. The performance and emission parameters are determined at two different spark timings such as 32o BTDC - 28oBTDC and 26oBTDC - 24oBTDC at the fixed compression ratio 10:1 for all blends. The experimental results inferred that, better performance and emission characteristics can be obtained by adding methanol with gasoline since it is volatile and has higher octane number than gasoline. The experimental results also revealed that 28oBTDC - 26oBTDC spark ignition combination increases the thermal efficiency with decreasing CO, UBHC, as well as NOx.