INTAKE DEVICE FOR MULTIPLE CYLINDER ENGINE

• Main Authors: ASHIKAGA KENSUKE, EBISU EISAKU, KATO JIRO, HAYATA MITSUNORI, KOJIMA YUJI, HIGASHIO MASAYOSHI, HIRATA TOSHIHIKO, KOGA TATSUYA, NAKAMURA KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 08.11.2018
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

PROBLEM TO BE SOLVED: To evenly distribute gas to each of cylinders while compactly laying out an intake passage in an intake device for a multiple cylinder engine.SOLUTION: An intake passage 30 includes: a plurality of independent passages 39 connected with each of intake ports 17, 18; a surge tank 38 to which an upstream side end of the independent passage 39 is connected; first and second branch passages 44R, 44L having lower ends each connected with the surge tank 38; and a straight pipe 43 which extends in a direction from one side to the other side of a cylinder row direction and is formed so that the first and the second branch passages 44R, 44L are branched from a downstream side end thereof. The first and the second branch passages 44R, 44L are formed in such a manner that an upstream side end continued from the downstream side end of the straight pipe 43 extends from one side to the other side of the cylinder row direction, and after that, a portion downstream of the upstream side end is curved toward a direction of the surge tank.SELECTED DRAWING: Figure 13 【課題】多気筒エンジンの吸気装置において、吸気通路をコンパクトにレイアウトしつつ、各気筒に対してガスを均等に分配する。【解決手段】吸気通路３０は、各々吸気ポート１７、１８の各々に接続された複数の独立通路３９と、独立通路３９の上流端部が接続されたサージタンク３８と、各々下流端部がサージタンク３８に接続された第１及び第２分岐通路４４Ｒ、４４Ｌと、気筒列方向の一側から他側へ向かう方向に延び、且つ下流端部から第１及び第２分岐通路４４Ｒ、４４Ｌが分岐するように形成された直管部４３とを有する。第１及び第２分岐通路４４Ｒ、４４Ｌは、それぞれ、直管部４３の下流端部から連続する上流端部が気筒列方向の一側から他側へ向かう方向に延びた後、該上流端部よりも下流側の部分がサージタンク方向に向かって湾曲するように形成されている。【選択図】図１３