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: 01.11.2018
• 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

To provide an intake device for a multiple cylinder engine including a SCV port, for reducing a difference in cylinder condition between cylinders in a fuel economy area.SOLUTION: Intake ports 17, 18 include the second port 18 in each cylinder 11 constructed so that the flow amount of gas passing therethrough is adjusted via a SCV 80. An intake passage 30 includes a plurality of independent passages 39 connected to the intake ports 17, 18, respectively, a surge tank 38 to which the plurality of independent passages 39 are connected in a row shape, and first and second branch passages 44b, 44c connected at their downstream ends to the surge tank 38. The first and second branch passages 44b, 44c are connected at a space in a cylinder row direction, and each connected to the surge tank 38 on extension lines L1, L2 extending from the upstream end of the independent passage 392 connected to the second port 18 to the opposite side to each cylinder 11 in viewing the surge tank 38 in a cylinder axis direction.SELECTED DRAWING: Figure 15 【課題】ＳＣＶポートを含んで構成された多気筒エンジンの吸気装置において、燃費領域における筒内状態の気筒間差を低減する。【解決手段】吸気ポート１７、１８は、各シリンダ１１につき、通過するガスの流量がＳＣＶ８０を介して調整されるよう構成された第２ポート１８を含み、吸気通路３０は、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、複数の独立通路３９が列状に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４４ｂ、４４ｃと、を有する。第１及び第２分岐通路４４ｂ、４４ｃは、気筒列方向に間隔を空けて接続されていると共に、それぞれ、サージタンク３８を気筒軸方向視したときに、第２ポート１８に接続された独立通路３９２の上流端部から各シリンダ１１に対して反対側へ延びる延長線Ｌ１、Ｌ２上においてサージタンク３８に接続されている。【選択図】図１５