Patent ID: 7549343
Filing Date: 2009-06-23
Classification: G01L

Abstract:
1. A sensor system for measuring the pressure in a combustion chamber of an internal combustion engine, comprising: at least one electrically conductive spring element; and at least one electrically conductive counter-element, wherein the spring element and the counter-element are in mechanical contact over at least one contact area, wherein a contact surface of the spring element has a different curvature profile from that of a contact surface of the counter-element, so that a force action or pressure action, that has 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, and wherein a contact surface of at least one of the spring element and the counter-element has a highly resistive coating, so that a size change in the contact area results in a change in a resistance of the system composed of the spring element and the counter-element.