Ford Motor Company Limited

Chester J Blechinger

Paul E Stevenson

Shaun L McCarthy

Louis R Focht

A flow sensor which includes a support structure including a base having a plurality of spaced mesas on a surface thereof is provided. A low thermal conductivity, dielectric diaphragm spanning the mesas is supported along its length thereby and forms an electrical and thermal insulation barrier over the support structure and the mesas. At least one flow sensing element is superposed on the diaphragm so that the flow sensing element is substantially electrically and thermally isolated from the support structure. A method for fabricating the flow sensor is also provided.

Mass flow sensor

A mass airflow meter for positioning within a duct wherein a fluid flows, particularly an air intake of an internal combustion engine, includes a symmetrical body having an axial passageway and a radial passageway. The radial passageway has a temperature dependent element positioned therein and extends from the axial passageway at an acute angle to the downstream flow of air. Accordingly, the radial passageway provides inertial separation of airborne particulate and also provides isolation from air flowing backwards through the air intake.

Mass airflow meter

A device for measuring the velocity of fluid includes a vortex generating means positioned in the fluid stream so that vortices are formed in the wake of the generating means. Plates elongated in the direction of fluid flow are positioned adjacent the vortex generating means to improve detection of the vortices by increasing the signal to noise ratio.

Vortex shedding mass air flow sensor with stabilized fluid flow

Mass air flow sensor

A vortex generator of triangular cross section has ridges on the upstream surfaces. Ridges which extend longitudinally in a direction parallel to the flow are located on the wall.

Low noise vortex shedding fluid flow sensor

A device for measuring the velocity of fluid includes a vortex generating means, a pressure sensor means and a processing means. The vortex generating means is positioned in the fluid stream so that vortices are formed in the wake of the generating means. The pressure sensor means is positioned in the wake of the generating means for sensing pressure variation caused by the passage of the vortices. The processing means is coupled to the pressure sensor for determining the fluid flow rate as a function of pressure changes sensed by the pressure sensor means.

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Bloomfield Hills, MI, United States of America

Chester J Blechinger