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; COMBUSTION ENGINES IN GENERAL; 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

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 46R, 46L having lower ends connected with the surge tank 38; and upstream side common passages 43-45 having a downstream side end from which the first and the second branch passages 46R, 46L are branched. The upstream side common passages 43-45 include a first passage 43 which extends in a direction from one side to the other side of a cylinder row direction, a second passage 44 which is bent to direct in a direction of the surge tank after extending to separate from the surge tank 38, and a third passage 45 from which the first and the second branch passages 46R, 46L are branched after extending along the direction of the surge tank, in order from the upstream side.SELECTED DRAWING: Figure 12 【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４６Ｒ、４６Ｌと、下流端部から第１及び第２分岐通路４６Ｒ、４６Ｌが分岐する上流側共有通路４３〜４５とを有する。上流側共有通路４３〜４５は、上流側から順に、気筒列方向の一側から他側へ向かう方向に延びる第１通路部４３と、サージタンク３８から離間するように延びた後、サージタンク方向を指向するように曲折された第２通路部４４と、サージタンク方向に沿って延びた後に第１及び第２分岐通路４６Ｒ、４６Ｌが分岐する第３通路部４５とを有する。【選択図】図１２