Sensor system for measuring pressure

Details Sensor system for measuring pressure Sensor system for measuring pressure

2008-03-12

2009-06-23

Caputo, Lisa M (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S719000, C073S754000

Reexamination Certificate

active

07549343

ABSTRACT:
A sensor system for measuring the pressure in the combustion chamber of an internal combustion engine, by the use of which a high measuring accuracy may be achieved, based on high measuring sensitivity and great thermal stability. In addition, the construction of the sensor system makes possible great system flexibility, and particularly very space-saving installation in the combustion chamber of an internal combustion engine. For this purpose, the sensor system includes at least one electrically conductive spring element and at least one electrically conductive counter-element,the spring element and the counter-element being in mechanical contact over at least one contact area,the contact surface of the spring element having a different curvature profile from that of the contact surface of the counter-element, so that a force action or pressure action, that have the effect of an elastic deformation of the spring element, results in a size change of the contact area between the spring element and the counter-element, andthe contact surface of at least one of the two elements, the spring element and/or the counter-element, being provided with a highly resistive coating, so that a size change in the contact area results in a change in the resistance of the system composed of the spring element and the counter-element.

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