Abstract
Gasohol can be replaced in the spark ignition engine (SI engine) as gasoline substitution having lower emissions exhaust gas, making it more environmentally friendly. The aim of study was to investigate the effect of gasoline- ethanol ratio on the gas exhaust emission of SI engine injection system. In this study, it was used the 4-stroke gasoline engine injection system by using the injector as a fuel input device. The engine had a 124.8 cc single-cylinder engine with compression ratio of 9.3:1. The variations of gasohol were gasohol E0, E10, E20, E30, E40, E50, E60, E70, E80, E90 and E100 with range of speeds; 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm, 4500 rpm and 5000 rpm. The research was run by rearranging the standard ECU to obtain the AFR stoichiometric of each gasohol mixture. The exhaust emissions were measured by using the Stargas-898. The results show that the addition of ethanol content was able to increase the CO 2 emissions , however, it would decrease the CO and HC levels. Compare to the gasoline fuel, gasohol has a lower emission of CO, HC and higher of CO 2 and O 2 emissions.
Highlights
In recent years, the energy needs tend to increase drastically such as the increasing of petroleum, natural gas and coal demand in the transportation sector, industry and household
The injection system works by mixing air and fuel on the stoichiometric state, it was inserted into the combustion chamber by an inlet valve that the quantity is measured by the airflow sensor controlled by the ECM (Electronic Control Module)
Figure. 2 shows the effect of ethanol content on the CO2 emission. It explains the relationship between gasohol content and CO2 exhaust gas emission in engine speed
Summary
The energy needs tend to increase drastically such as the increasing of petroleum, natural gas and coal demand in the transportation sector, industry and household. High consumption levels greatly affect the environmental effects as the energy conversion process effects It makes the environment dangerous emissions producing toxic gas like CO, HC, and NOx emissions. One of ways to overcome the problem if it is used the electronic control injection system, so that the exhaust gas emission can be controlled. Why it is important to use ethanol as the fuels, due to obtain a high engine performance and environmentally friendly exhaust emissions. The use of gasohol has several advantages like low toxic gas emissions It is because gasohol contains 34% oxygen insuring to produce the perfect combustion. The injection system works by mixing air and fuel on the stoichiometric state, it was inserted into the combustion chamber by an inlet valve that the quantity is measured by the airflow sensor controlled by the ECM (Electronic Control Module). We used the indirect injection in which the gasohol was injected in the inlet valve, afterwards, it would inserted to combustion chamber with the air when the suction step
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