| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a gas flow rate measuring apparatus whereby the pressure loss can be reduced with ensuring a good measuring accuracy. SOLUTION: The gas flow rate measuring apparatus 10 comprises an air flow meter 20 mounted on a cleaner pipe 11 and orifice 30 provided in the cleaner pipe 11, the orifice 30 has a peripheral part fixed to the inner side wall of the cleaner pipe 11, the peripheral edge of a notch 31 formed into the orifice 30 and inner side wall of the cleaner pipe 11 define an opening 32 which partly reduces the passage sectional area in the cleaner pipe 11, and a measuring part of the air flow meter 20 is disposed in a reduced flow formed when an intake air passes through the opening 32.</p> |
