| 摘要 |
PURPOSE:To obtain approximately the same output under the same conditions, by providing the inlet opening part of a bent pipe in the direction, which does not receive the dynamic pressure of an intake air flow with respect to the axial line of a Venturi part, and guiding a static pressure to the inlet opening part of the bent pipe. CONSTITUTION:An inlet opening part 18 of a bent pipe 12 is opened at a clearance angle theta as shown by a cutting line D with respect to an axial direction line C of a Venturi part 3. The intake air flows along the axial direction line of the Venturi part 3, but the inlet opening part 18 of the bent pipe 12 does not receive the dynamic pressure of the intake air flow. Therefore, the output of a heat sensitive resistor, which is arranged in a bypass air path 8 of an air flow rate detecting device, becomes approximately the same under the same conditions. |
