Evaluation on the Performance of Automobile Engine Using Air Injection Nozzle in the Intake Manifold

Taejung Kim, Yunchan Shin, Jungsoo Park and Honghyun Cho
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Taejung Kim: Department of Automobile, Seoul Jungsu Campus, Korea Polytechnic University, Seoul 04392, Korea
Yunchan Shin: Department of Mechanical Engineering, Chosun University, Gwangju 61452, Korea
Jungsoo Park: Department of Mechanical Engineering, Chosun University, Gwangju 61452, Korea
Honghyun Cho: Department of Mechanical Engineering, Chosun University, Gwangju 61452, Korea

Energies, 2021, vol. 14, issue 24, 1-16

Abstract: In the present study, a nozzle was used to improve the flow performance of an intake manifold, and its effects on the automobile engine output and the exhaust gas were experimentally studied. It was found that the engine output of a vehicle with a mileage of 30,000 km increased by 4.7% and 6.5% when nozzles with diameters of 5 and 2.5 mm were used. In addition, the engine output of a vehicle with a mileage of 180,000 km increased by 3.3% and 13.3% when nozzles with diameters of 5 and 2.5 mm were used compared to those of the same vehicle when no nozzle was used. Thus, using a nozzle for the inflow of outside air created a uniform combustion environment to improve the engine output and reduce harmful exhaust gases, such as hydrocarbon, carbon monoxide, and nitrogen oxides, by generating vortexes inside the intake manifold and increasing the degree of mixing. Furthermore, the smaller nozzle with a diameter of 2.5 mm had greater effects.

Keywords: nozzle; intake manifold; engine output; harmful exhaust gas; inflow of outside air; vortexes (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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