초록 ▼

A mass air flow sensor comprising: a sensing device with a substantially flat surface from a first point to a second point in a flow path, a heating element substantially centrally located between the first and second points, a first sensing element located between the first and second points on a f

A mass air flow sensor comprising: a sensing device with a substantially flat surface from a first point to a second point in a flow path, a heating element substantially centrally located between the first and second points, a first sensing element located between the first and second points on a first side of the heating element in the flow path direction, a second sensing element located between the first and second points on a second side of the heating element opposite the first side in the flow direction; and an air foil mounted a predetermined distance apart from the sensing device having a surface facing the heating element and the first and second sensors, wherein the air foil deflects air flow past the sensing device to be incident on the sensing device at an angle, wherein the air foil is symmetrical with respect to a line perpendicular to a center of the heating element and wherein bi-directional air flow past the sensing device is substantially free of turbulence between the first and second points.

대표청구항 ▼

A mass air flow sensor comprising: a sensing device with a substantially flat surface from a first point to a second point in a flow path, a heating element substantially centrally located between the first and second points, a first sensing element located between the first and second points on a f

A mass air flow sensor comprising: a sensing device with a substantially flat surface from a first point to a second point in a flow path, a heating element substantially centrally located between the first and second points, a first sensing element located between the first and second points on a first side of the heating element in a flow path direction, a second sensing element located between the first and second points on a second side of the heating element opposite the first side in the flow path direction, and wherein the sensing elements are responsive to heat generated by the heater that propagates upstream in the flow path towards one of the sensing elements and downstream in the flow path towards the other of the sensing elements; and an air foil mounted a predetermined distance apart from the sensing device having an air foil surface that is convex and continuously curved along a direction parallel to the flow path between the first point and the second point facing the heating element and the first and second sensors, wherein the air foil surface deflects air flow past the sensing device to be incident on the sensing device at an angle, wherein the air foil is symmetrical with respect to a line perpendicular to the flat surface and intersecting a center of the heating element and wherein bi-directional air flow past the sensing device is substantially free of turbulence between the first and second points.