To provide an intake system for an internal combustion engine capable of improving the filling efficiency of the internal combustion engine by lowering an intake temperature, and of improving the output performance and fuel economy of the internal combustion engine.SOLUTION: In viewing an intake duct 11 of an intake system 10 from above an engine 2, the intake duct 11 has a U-shaped passage 11A consisting of an upstream duct part 11c extending to the rear side further than an intake port 11a, a reversed duct part 11d reversed frontward from the upstream duct part 11c, and a downstream duct part 11e extending frontward from the reversed duct part 11d. On the lower part of a space 26 encircled by the inner peripheral face of the U-shaped passage 11A, a connection plate 25 is provided for connecting the upstream duct part 11c and the downstream duct part 11e to each other. A rear end 25r of the connection plate 25 is located below a lower part 11u of the reversed duct part 11d so that travel wind W taken from the front of a vehicle 1 is guided from the connection plate 25 through between the connection plate 25 and the reversed duct part 11d to the intake manifold 15 side.SELECTED DRAWING: Figure 5
【課題】吸気温度を下げて内燃機関の充填効率を向上でき、内燃機関の出力性能と燃費を向上できる内燃機関の吸気装置を提供すること。【解決手段】吸気装置10の吸気ダクト11をエンジン2を上方から見た場合に、吸気ダクト11は、吸気口11aより後方側に延びる上流ダクト部11cと、上流ダクト部11cから前方に反転する反転ダクト部11dと、反転ダクト部11dから前方に延びる下流ダクト部11eとからなるU字状通路部11Aを有する。U字状通路部11Aの内周面に囲まれる空間26の下部に上流ダクト部11cと下流ダクト部11eを相互に連結する連結板25が設けられており、連結板25の後端部25rを反転ダクト部11dの下部11uより下方に位置させ、車両1の前方から取り入れられる走行風Wを、連結板25から連結板25と反転ダクト部11dの間を通して吸気マニホールド15側に導く。【選択図】図5
INTAKE SYSTEM FOR INTERNAL COMBUSTION ENGINE
内燃機関の吸気装置
2021-11-01
Patent
Electronic Resource
Japanese
IPC: | F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
INTAKE DUCT STRUCTURE OF INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE
European Patent Office | 2017
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