The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
May. 18, 2000
Stefan Simon, Zaberfeld, DE;
Holger Krebs, Erdmannhausen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injector-pressure sensor combination for fuel injection systems for direct injection of fuel into the combustion chamber of an internal combustion engine and for measurement of the pressure in the combustion chamber includes a piezoelectric or magnetostrictive element. The piezoelectric or magnetostrictive element is positively connected with a valve closer which interacts with a valve seat face to form a sealing seat. In addition, an electronic control and analysis circuit is provided which activates the piezoelectric or magnetostrictive element during a fuel injection phase in such a way that the valve closer activated by the piezoelectric or magnetostrictive element lifts off from the valve seat face and opens the seat. During a pressure measurement phase, the control and analysis circuit detects a pressure in the combustion chamber transmitted from the valve closer to the piezoelectric or magnetostrictive element and converted by the latter into an electric signal.