Current-pressure transducer, particularly for a vacuum control i

Details Current-pressure transducer, particularly for a vacuum control i Current-pressure transducer, particularly for a vacuum control i

1988-10-14

1989-08-22

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

1376275, G05D 1606

Patent

active

048586390

ABSTRACT:
A current-pressure transducer, in particular for a vacuum control in automotive vehicles, is developed with a chamber (11) which is provided with a connection (18) for supply vacuum, with a connection (19) for removal of control pressure, with an air inlet for outside pressure and with a membrane (12) as chamber wall. The membrane can be displaced by a plunger-type armature (5) of a plunger-type armature electromagnet (1-7). With the membrane there is controlled a double valve (13-17) which, depending on the position of the membrane (12), can produce a fluid-conducting connection to the supply vacuum or to the outside pressure until the control pressure in the chamber (11) corresponds to the force exerted by the plunger-type armature (5) on the membrane and, in particular, is proportional to it. For the end position of the slope of the pressure-current characteristic, an approximately annular air gap (6) between the plunger-type armature (5) and a core (3) of the electromagnet is developed eccentrically to the longitudinal axis of said magnet and is adjustable rotatably around the longitudinal axis. The plunger-type armature (5) is for this purpose swingably mounted around a swing point outside the center line.

REFERENCES:
patent: 3545472 (1970-12-01), Franz
patent: 4424831 (1984-01-01), Nugent
patent: 4598729 (1986-07-01), Naito

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