Patent ID: 6318342
Filing Date: 2001-11-20
Classification: F02D,F02M,G01L

Abstract:
A fuel injector-pressure sensor combination for a fuel injection system providing a direct injection of a fuel into a combustion chamber of an internal combustion engine and providing a measurement of a pressure in the combustion chamber, comprising:an arrangement including one of a piezoelectric element and a magnetostrictive element;a valve seat face;a valve closer for interacting with the valve seat face in order to form a sealing seat, the valve closer including a positive connection with the one of the piezoelectric element and the magnetostrictive element; andan electronic control and analysis circuit for activating the one of the piezoelectric element and the magnetostrictive element during a fuel injection phase in such a way that the valve closer activated by the one of the piezoelectric element and the magnetostrictive element lifts off from the valve seat face and opens the sealing seat, the electronic control and analysis circuit detecting during a pressure measurement phase a pressure in the combustion chamber that is transmitted from the valve closer to the one of the piezoelectric element and the magnetostrictive element and that is converted by the one of the piezoelectric element and the magnetostrictive element into an electric signal.