| 摘要 |
PROBLEM TO BE SOLVED: To reduce the variation of an output signal of an air flow meter.SOLUTION: An outlet 22 of an air cleaner includes a cylindrical part 24 to which an air flow meter 50 for measuring the flow rate of air is attached, and a cylindrical member 26 connected to an upstream side end portion 24a of the cylindrical part 24. In an upstream side of the air flow meter 50, step portions 32 are formed by an inner circumferential face of the cylindrical part 24 and an inner circumferential face of the cylindrical member 26. The positions of the step portions 32 in an axial direction A are different from each other in the circumferential direction. |
