INTAKE STRUCTURE OF ENGINE

To provide an intake structure of an engine capable of enhancing mixing of intake air and an EGR gas, while disposing an intake passage around an engine body in compact.SOLUTION: An intake passage is provided with a first passage portion with a throttle valve and a second passage portion disposed at...

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Main Authors TANAKA KIYOTAKA, SUNANAGARE TAKETAKA, GONDAI AKINORI, YAMAUCHI TAKETOSHI, MURAKAMI KAZUKI, KATO JIRO, HAYASHI KAZUHIDE, YAMASHITA OSAMU, NAITO MASAHIRO, HASEGAWA YUICHI, NAKAMURA KAZUHIRO
Format Patent
LanguageEnglish
Japanese
Published 07.06.2023
Subjects
BLASTING
COMBUSTION ENGINES
COMBUSTION ENGINES IN GENERAL
CONTROLLING COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INTERNAL-COMBUSTION PISTON ENGINES
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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Summary:To provide an intake structure of an engine capable of enhancing mixing of intake air and an EGR gas, while disposing an intake passage around an engine body in compact.SOLUTION: An intake passage is provided with a first passage portion with a throttle valve and a second passage portion disposed at a downstream side of the first passage portion, the first passage portion has a shape linearly extending along a prescribed first direction, and the second passage portion has a shape curved from an end portion at the downstream side of the first passage portion toward one side in a second direction orthogonal to the first direction with respect to the end portion. A curved wall extending while curving from the other side part in the second direction of an inner wall of the first passage portion toward one side in the second direction is disposed on an inner wall of the second passage portion, the curved wall has a curved shape recessed to be convex to the other side in the second direction, and an end portion at a downstream side of an EGR passage is connected to an end portion at an upstream side of the curved wall.SELECTED DRAWING: Figure 5 【課題】エンジン本体周りに吸気通路をコンパクトに配設しつつ吸気とＥＧＲガスの混合を促進できるエンジンの吸気構造を提供する。【解決手段】吸気通路に、スロットル弁が配設された第１通路部と、当該第１通路部の下流側に配設された第２通路部とを設け、第１通路部を所定の第１方向に沿って直線状に延びる形状とし、第２通路部を、第１通路部の下流側の端部から、当該端部に対して第１方向と直交する第２方向の一方側にむかって湾曲する形状とし、第２通路部の内壁に、第１通路部の内壁の第２方向の他方側部分から第２方向の一方側に向かって湾曲しつつ延びる湾曲壁を設け、湾曲壁を、第２方向の他方側に凸となるように窪んだ湾曲形状とし、ＥＧＲ通路の下流側の端部を、湾曲壁の上流側の端部に接続する。【選択図】図５
Bibliography:Application Number: JP20210192005