Pressure pickup for measuring the pressure in the intake manifold of an internal combustion engine

Claim 1

A pressure pickup for measuring the pressure in the intake manifold of an internal combustion engine, comprising: a housing with a part separating said housing into a first chamber and a second chamber, said first chamber being in communication with said intake manifold and said part being movable in response to said pressure in said first chamber, an electromagnet in said second chamber including a core and at least one coil and generating magnetic flux lines in said, means for short-circuiting the magnetic flux lines covering said central leg of said core and connected to said part for movement therewith slidably in said recess to thereby change the induction of said coil, and said core comprising an E-shaped member with three legs including a central leg defining an annular recess, said coil being disposed in the bottom of said recess in surrounding relationship with said central leg and in underlying relationship with said short-circuiting means, circuit means connected to said electromagnet for evaluating the inductance of said coil thus indirectly measuring the intake manifold pressure.