Thermo-type air flow meter

Details Thermo-type air flow meter Thermo-type air flow meter

1991-04-02

1993-09-14

Woodiel, Donald O.

Measuring and testing

Volume or rate of flow

Thermal type

7320425, G01F 168

Patent

active

052438597

ABSTRACT:
An axial flow thermo-type air flow meter for internal combustion engines has a spider disposed in a main air passage formed in a body and having formed therein an auxiliary air flow passage including an axial auxiliary air flow passage portion accommodating a heat-generating resistor element for detecting a rate of engine intake air flow. The auxiliary air flow passage also includes more than one radial air flow passage portions which are connected to the axial air flow passage portion and curved and turned at their radially outer ends and then extend radially inwardly to outlet ends open to the main air passage, whereby the total length of the auxiliary air flow passage is increased to decrease the influence of pulsation of engine intake air flow on the air flow meter. Positioning of the outlet openings of the auxiliary air flow passage within a range of a radius from the axis of the main air flow passage, which radius is 1/2 of the radius of the main air flow passage, is effective to reduce fluctuation of the electric output of the air flow meter due to an unbalanced air flow velocity distribution occurring upstream of the air flow meter.

REFERENCES:
patent: 4709581 (1987-12-01), Nishimura et al.
patent: 4887577 (1992-12-01), Arai et al.

Affiliated with

Also associated with

Rating

Thermo-type air flow meter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermo-type air flow meter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermo-type air flow meter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2020061