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| Experimental Study of the Methanol Gasoline Dual Fuel Spark Ignition (DFSI) Combustion |
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| Key Words:IC engine methanol gasoline spark ignition knock particle |
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| Abstract:An experimental study on methanol-gasoline and gasoline-methanol dual-fuel spark ignition (DFSI) combustions for knock suppression and higher engine efficiency was conducted with a high compression ratio gasoline engine. The methanol gasoline DFSI was organized using a port fuel injection (PFI) of methanol and a direct injection (DI) of gasoline, while the gasoline-methanol DFSI was organized by gasoline PFI and methanol DI. The tested engine was naturally aspirated and operated at stoichiometric condition. In the test, the amount of methanol injection was varied from 0 to 100%. The effects of these two injection modes on knock-limit extension, fuel economy, and PM reduction were investigated. The test results show that both the methanol-gasoline DFSI and gasoline-methanol DFSI are promising approaches of using alternative alcohol fuels in practical gasoline engines with significant improvement in engine efficiency and knock suppression. The gasoline - methanol DFSI exhibits better in anti-knock performance and PM reduction than the methanol-gasoline DFSI. |
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