INTAKE DEVICE FOR MULTIPLE CYLINDER ENGINE
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 th...
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Main Authors | , , , , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
01.11.2018
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Subjects | |
Online Access | Get full text |
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Summary: | 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 |
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Bibliography: | Application Number: JP20170067681 |