US 7,124,750 B2 · Relative position sensing for an exhaust gas recirculation valve

Abstract

An exhaust gas recirculating valve includes a body, a closure member, a magnet, and a magneto-resistive sensor. The body defines a passage through which exhaust gas flows. The body includes a seat and the passage includes an aperture defined by the seat. The closure member is displaced between first and second configurations with respect to the seat. The first configuration sets at zero percent a percentage of exhaust gas that flows from an exhaust manifold of an internal combustion engine to an intake manifold of the internal combustion engine, and the second configuration sets at 100 percent the percentage of exhaust gas that flows from the exhaust manifold of the internal combustion engine to the intake manifold of the internal combustion engine. The magnet moves congruently with the closure member, and the magneto-resistive sensor detects the movement of the magnet so as to determine the percentage of exhaust gas flow.

Claims12

Dependent claims

An exhaust gas recirculating valve comprising:

a body defining a passage through which exhaust gas flows, the body includes a seat, and the passage includes an aperture defined by the seat;
a closure member being displaced between first and second configurations with respect to the seat, the first configuration setting at zero percent a percentage of exhaust gas flowing from an exhaust manifold of an internal combustion engine to an intake manifold of the internal combustion engine, and the second configuration setting at 100 percent the percentage of exhaust gas flowing from the exhaust manifold of the internal combustion engine to the intake manifold of the internal combustion engine;
a magnet moving congruently with the closure member;
and
a magneto-resistive sensor detecting movement of the magnet so as to determine the percentage.

2 more elements

A system to recirculate exhaust gas from an exhaust manifold of an internal combustion engine to an intake manifold of the internal combustion engine, the system comprising:

an inlet conduit being coupled to the exhaust manifold and receiving a first supply of the exhaust gas;
an outlet conduit being coupled to the intake manifold and delivering a second supply of the exhaust gas, the second supply being a percentage of the first supply;
and
a valve coupled between the inlet and outlet conduits, the valve setting the percentage of the first supply that is the second supply, the valve including:
a seat defining an aperture;
a closure member being displaced between first and second configurations with respect to a seat, the first configuration setting the percentage at zero percent, and the second configuration setting the percentage at 100 percent;
a magnet moving congruently with the closure member;
and
a magneto-resistive sensor detecting movement of the magnet so as to determine the percentage.

6 more elements

Dependencies are inferred from the claim text.

Relative position sensing for an exhaust gas recirculation valve

Life of this patent

Relative position sensing for an exhaust gas recirculation valve

Life of this patent

Abstract

Claims12