• Title/Summary/Keyword: 레이저 쉬트

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A Study on Analysis of Intake Flow in a 5-valves Gasoline Engine by using a Two Color PIV System (이색 PIV를 이용한 5밸브 가솔린 엔진의 흡입 유동 해석)

  • Woo, Young-Wan;Park, Sang-Chan;Lee, Ki-Hyung;Lee, Chang-Sik
    • Proceedings of the KSME Conference
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    • 2001.06d
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    • pp.933-938
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    • 2001
  • A 5-valve(intake 3-valve) engine has been developed to increase engine performance. These vehicles have a high power caused by the decrease of inertia mass of an intake valve and the increase of intake effective area. In this study, velocity profiles at near intake valves were inspected by using a two-color PIV and laser sheet method with tumble control valve(TCV). In addition, steady flow tests were performed to quantify tumble ratio on flow-fields generated with a TCV. These experimental results show that the tendency of the tunble ratio in intake 3-valve engine is different from the one in intake 2-valve engine. From this results, the intake flow characteristics around intake valves were made clear.

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Investigation on the In-Cylinder Flow of 5-Valve Gasoline Engine by Using Two Color PIV Method (이색 PIV 기술을 이용한 5밸브 가솔린엔진 연소실 내의 유동특성 분석)

  • Lee, Gi-Hyeong;U, Yeong-Wan;Park, Sang-Chan;Lee, Chang-Sik
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.26 no.2
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    • pp.238-244
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    • 2002
  • A 5-valve(intake 3-valve) engine has been developed to increase engine performance. These engines have a high power caused by the decrease of inertia mass of an intake valve and the increase of intake effective area. In this study, in-cylinder flow patterns were visualized with laser sheet method and velocity profiles at near intake valves were inspected by using a two-color PIV. In addition, steady flow tests were performed to quantify tumble ratio of flow-fields generated by a tumble control valve(TCV). Experimental results of steady flow test show that the cure of tumble ratio in intake 3-valve engine farmed as a S shape with valve lift changes. This tendency is different from the one in intake 2-valve engine. Using laser sheet method and two color PIV method, we can find that the intake flow through upper valve increases and the velocity gradient also slightly increases as valve lift increases. From this study, the in-cylinder flow characteristics around intake valves were made clearly.