JPWO2022210121A5 - - Google Patents

Claims (8)

an intake passage (60) facing the combustion chamber (32) and having an intake valve port (34) opened and closed by an intake valve (44);
an exhaust passage (64) facing the combustion chamber (32) and having an exhaust valve port (36) opened and closed by an exhaust valve (46);
A partition part (70) provided in the intake passage (60) to divide the intake passage (60) into a plurality of intake passage parts including a first intake passage (72), wherein the first intake passage a partition portion (70), wherein the passage (72) can be a tumble flow path for generating a tumble flow in the combustion chamber (32);
When defining an imaginary plane (IS) that passes through the center (34a) of the intake valve port (34) and the center (36a) of the exhaust valve port (36) and extends parallel to the cylinder axis (C), the a deflection part (DP) configured to deflect the intake air from the first intake flow path (72) to the combustion chamber (32) to one side of the imaginary plane (IS);
an ignition means (54) provided in the combustion chamber (32) and positioned on the one side of the imaginary surface (IS);
When the direction from the crankshaft (12) side to the cylinder head (24) side in the direction of the cylinder axis (C) is defined as a first direction, the partition portion (70) is connected to the first intake flow path (72). and a second intake flow path (74) on the first direction side of the first intake flow path (72) formed to overlap with the first intake flow path (72) in the direction of the cylinder axis (C). ), extending in the intake flow direction so as to separate the intake passage (60);
The deflection section (DP) has a wall surface (24w) provided so as to deflect the intake air from the first intake flow path (72) to the one side of the virtual surface (IS), and the wall surface (24w) 24w) is located on the second direction side of the second intake flow path (74), when a direction opposite to the first direction in the cylinder axis (C) direction is defined as a second direction; Extending in the direction of the cylinder axis (C) and in the intake flow direction,
An internal combustion engine (10) characterized in that when the wall surface (24w) is extended in the direction of the cylinder axis (C), the extended wall surface (24w) crosses the second intake flow path (74). (delete) At least the downstream end portion (72d) of the first intake flow path (72) is biased toward the one side with respect to the intake valve port (34) by the deflection portion (DP). An internal combustion engine (10) according to claim 1. (delete) The cross-sectional area of the second intake flow path (74) is larger than the cross-sectional area of the first intake flow path (72), and the fuel injection valve (78) has a cross-sectional area of the second intake flow path (74). Internal combustion engine (10) according to claim 1 or 3, characterized in that it is located on the side. The internal combustion engine according to any one of claims 1, 3 and 5, wherein a combustion chamber ceiling surface (24t) defining a part of the combustion chamber (32) is formed into a concave curved surface. (10). The internal combustion engine according to any one of claims 1, 3, 5 and 6, further comprising an intake control valve (114) downstream of the partition (70). The ignition means (54) includes a central electrode (54e) and a side electrode (54f), and the side electrode (54f) has a base end (54g) and a base end (54g). It has a curved part (54h) that curves so as to cover the center electrode (54e),
The base end portion (54g) of the side electrode (54f) is disposed offset from the center electrode (54e) in a width direction intersecting the cylinder axis (C).
Internal combustion engine (10) according to any one of claims 1, 3, 5 to 7.