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At present , energy-saving and environmental protection has become the two major themes in the automotive industry . Ethanol as a renewable energy source , as an automobile engine fuel , we can ease the pressure of scarce oil resources , and can effectively reduce automobile exhaust pollution on the environment . Many research institutions at home and abroad are committed to vehicle engine fueled with ethanol , the study has important theoretical significance and practical value . In this paper, a model for TU32K (K2D) inline four-cylinder , water-cooled , four-stroke , 1.36 liter displacement gasoline as an experimental prototype , the original gasoline engine fuel supply system reconstruction, designed to establish a test the electricity control engine fuel supply system , which is characterized by a continuously adjustable to achieve a mixing ratio of gasoline and ethanol . After transformation engine calibration of the steady - state conditions , engine performance comparison test , the study analyzed the impact of the ethanol concentration in the range of 0-40% of mixed fuel on engine performance . Application of fuzzy comprehensive evaluation method , derived the five ethanol blended E20 's overall performance than Option optimal , both to ensure the power of the engine and can achieve energy-saving and low-emission may require . The bench test results showed that: the premise of keeping the same basic parameters of gasoline , it can be seen from the outside of the engine characteristic curve , the dynamic performance of the gasoline engine at low speeds , reducing high speed elevated changed slightly ; With the ethanol concentration increases, the rate of increase in fuel consumption . A comparative study of the engine idling emissions , the results show a higher concentration of ethanol will greatly reduce the idle CO and NOx emissions , but will increase the unburned HC emissions . For steady state conditions by CO, HC and NOx emissions are reduced.
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