JPWO2022208699A5 - - Google Patents

Claims (9)

an intake passage (80, 180, 280) connected to the combustion chamber (36) of the internal combustion engine (30);
A unit provided in the intake passage (80, 180, 280) that changes the opening area of the intake passage (80, 180, 280) to change the intake flow rate flowing into the intake passage (80, 180, 280). one intake flow rate variable valve (75, 175);
On the downstream side of the variable intake flow rate valve (75, 175), a tumble passage (80, 180, 280) configured to allow intake air to generate a tumble flow within the combustion chamber (36) is provided. 80A, 180A, 280A) and a main flow path (80B, 180B, 280B) excluding the tumble flow path (80A, 180A, 280A). In,
The intake flow rate variable valve (75, 175) has a tumble flow path side closing valve portion (77b, 177b, 200b, 201b, 202b, 203b) that closes only the tumble flow path (80A, 180A, 280A) side. ,
As the opening (83, 183, 283) of the main flow path (80B, 180B, 280B) becomes larger, the tumble flow path side blocking valve portion (77b, 177b) becomes closer to the tumble flow path (80A, 180A, 280A) side. The openings (82, 182, 282) are made smaller;
The intake flow rate variable valve (75) includes a butterfly valve portion (77a) that closes the intake passage (80);
An intake structure for an internal combustion engine, comprising: a tumble flow path side closing valve portion (77b) that closes only the tumble flow path (80A). When the intake flow rate variable valve (75, 175) is fully open to the main flow path (80B, 180B, 280B), the opening (82, 182, 282) on the tumble flow path (80A, 180A, 280A) side is The intake structure for an internal combustion engine according to claim 1, wherein the intake structure is completely closed. As the tumble passage side blocking valve portion (77b, 177b, 200b, 201b, 202b, 203b) closes the tumble passage (80A, 180A, 280A) side of the intake passage (80, 180, 280), , wherein the intake flow rate variable valve (75, 175) enlarges the opening (83, 183, 283) on the main flow path (80B, 180B, 280B) side. Intake structure of internal combustion engine. (delete) The internal combustion engine according to any one of claims 1 to 3, wherein the tumble flow path side blocking valve part (77b) is fixed in a direction perpendicular to the butterfly valve part (77a). Intake structure. 6. The intake structure for an internal combustion engine according to claim 5, wherein the tumble flow passage side blocking valve part (77b) is spaced apart from the upstream end (81a) of the partition part (81). The intake flow rate variable valve (175) has through holes (177c, 200c, 201c, 202c, 203c),
Claims 1 to 3, wherein the intake flow rate variable valve (175) is slidable in a direction intersecting the intake flow direction, thereby varying an opening ratio with respect to the intake passage (180, 280). An intake structure for an internal combustion engine according to any of the above. Claim 7, wherein the through holes (177c, 200c, 201c, 202c, 203c) are open from the tumble channel (180A, 280A), while the main channel (180B, 280B) is closed. The intake structure of the internal combustion engine described in . The main flow path (180B, 280B) is formed to have a larger cross-sectional area than the tumble flow path (180A, 280A), and the through hole (177c, 200c, 201c, 202c, 203c) is formed to have a larger cross-sectional area than the main flow path (180B, 280B). The intake structure for an internal combustion engine according to claim 8, wherein the intake structure has an opening width (h ₁ , h ₂ ) corresponding to an upstream opening (180Ba, 280Ba) of the intake structure.