Patent ID: 7234349
Filing Date: 2007-06-26
Classification: F02M,G01F

Abstract:
1. An air flow rate measuring device comprising: a measurement body that defines a bypass passage and a bent portion, the bypass passage being defined in an air passage through which air flows, the bent portion being arranged midway the bypass passage, the bent portion changing a flow direction of air; and a sensing unit that is arranged in the bypass passage, the sensing unit measuring a flow rate of air flowing through the bypass passage, wherein the measurement body has a wall surface, outside which air flows, wherein the wall surface defines a sub-outlet that is an opening, wherein the sub-outlet is arranged between the bent portion and a passage outlet opened to a downstream end of the bypass passage, the sub-outlet is formed with at least a first sub-outlet and a second sub-outlet, wherein the first sub-outlet and the second sub-outlet open to different paths between a path of air flowing on the inside of the bent portion and a path of air flowing on the outside of the bent portion, and the first sub-outlet and the second sub-outlet are arranged in different positions with respect to a flow direction of air flowing through the bypass passage.