Patent ID: 8950248
Filing Date: 2015-02-10
Classification: F02D,G01F

Abstract:
1. An air flow measuring device that is adapted to be disposed in an intake passage through which intake air drawn into an internal combustion engine flows and that is configured to take in a part of intake air flowing through the intake passage and to produce an electrical signal in accordance with a flow rate of intake air, the device comprising: a housing that defines a bypass flow passage through which the taken-in intake air passes and which has an outlet that opens on an outer wall of the housing; and a sensor that is accommodated in the bypass flow passage to produce the electrical signal as a result of heat transfer between the taken-in intake air and the sensor, wherein: the outlet of the bypass flow passage includes a vertical opening and a non-vertical opening; the vertical opening is provided perpendicular to the flow of intake air in the intake passage and opens toward a downstream side of a flow of intake air in the intake passage; the non-vertical opening is provided non-perpendicularly to the flow of intake air in the intake passage; and the outlet is a continuous opening where the vertical opening and the non-vertical opening are continuously formed.