| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine in which a flow rate of air taken into a combustion chamber is sufficiently assured.SOLUTION: A cylinder head comprises two intake ports 31, 32 opened at a combustion chamber each of which is opened or closed by two intake valves; intake port 37 arranged for every combustion chamber and communicated with each of the two intake ports 31, 32. The intake port 37 comprises one upstream side port 371 arranged at upstream side; two downstream side ports 372, 373 arranged at a downstream side where inlets 374, 375 are branched from the one upstream side port 371 and outlets 376, 377 are communicated with each of the two inlet ports 31, 32; at least one downstream side port 372 of the two downstream side ports 372, 373 is curved outside of an intake valve arranging direction as seen from a top plan view of the cylinder head rather than a straight line P where an axis line N connects an inlet center and an outlet center of the downstream side port 372.SELECTED DRAWING: Figure 3 |
