Magnetically coded temperature and pressure detection apparatus
AssigneeEaton Corporation
InventorDale Arden Stretch
Life of this patent
Estimating the term…
Abstract
An apparatus for measuring temperature comprises a housing and an actuator pressure sealed to the housing and having a shaft. The actuator is configured to be in pressure communication with a volume of gas or liquid. Upon a change in pressure, the actuator is displaced at least partially in the axial direction. A sensor detects axial displacement of a magnetically encoded target upon the change in pressure in the volume. A device for measuring pressure and temperature in an engine cylinder comprises a valve in pressure communication with an engine cylinder. The valve stem has a magnetic coding located adjacent a sensor. Axial displacement of the stem under cylinder pressure and temperature changes are detected.
Claims23
An apparatus for measuring temperature in an internal combustion engine comprising:
- an engine valve having a valve head and a valve stem extending from valve head in an axial direction, the valve head having a valve face configured to be in pressure communication with an engine cylinder, the valve stem configured to extend through an opening in a valve guide secured to an engine block of the internal combustion engine, the valve stem having information magnetically encoded on the valve stem providing a magnetic coding target;
- a magnetic coding sensor installed in the internal combustion engine adjacent to the magnetic coding target, the magnetic coding sensor configured to detect axial displacement of the valve stem resulting from a change in temperature of the valve stem and provide information corresponding to the temperature of the internal combustion engine.
An apparatus for measuring temperature in an internal combustion engine comprising:
- an engine valve having a valve head and a valve stem extending from valve head in an axial direction, the valve head having a valve face configured to be in pressure communication with an engine cylinder, the valve stem having information magnetically encoded on the stem providing a magnetic coding target;
- and,
- a magnetic coding sensor configured to be rigidly secured to the internal combustion engine adjacent the magnetic coding target, the sensor configured to detect axial displacement of the valve stem resulting from axial expansion or contraction of the valve caused by a change in temperature of the valve and provide engine temperature information corresponding to the detected axial displacement.
An apparatus for measuring temperature in an internal combustion engine comprising:
- an engine valve having a valve head and a valve stem extending from valve head in an axial direction and configured to extend through an opening in a valve guide in an engine block of the internal combustion engine, the valve head having a valve face configured to be in pressure communication with an engine cylinder;
- the valve stem having information magnetically encoded thereon and configured to be read by a magnetic coding sensor by detecting axial expansion or contraction of the valve resulting from a change in temperature of the valve, the sensor rigidly secured to an internal combustion engine adjacent an end of the valve guide distal to the engine cylinder.
Dependencies are inferred from the claim text.