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. 12, 2013
Filed:
May. 28, 2010
Wiliam Brace, Otalampi, FI;
Pekka Hautala, Espoo, FI;
Jukka Kiijarvi, Kylmala, FI;
Markus Niemi, Vantaa, FI;
Wiliam Brace, Otalampi, FI;
Pekka Hautala, Espoo, FI;
Jukka Kiijarvi, Kylmala, FI;
Markus Niemi, Vantaa, FI;
Wartsila Finland Oy, Vaasa, FI;
Abstract
A fuel injector valve () of a piston engine, which comprises a fuel chamber () for the fuel to be injected, a valve needle () for guiding the fuel injection from the fuel chamber () into the cylinder () of the engine, a spring () for pressing the valve needle () towards the closed position, and a piezoelectric actuator () for guiding the valve needle (). Additionally, the injector valve () comprises a drawbar (), which is loosely coupled to the valve needle (), a second drawbar (), which is attached to the piezoelectric actuator () and loosely coupled to the drawbar (), and that the injector valve () comprises a second spring () fitted in connection with the drawbar () for pressing the valve needle () towards the closed position and a third spring () fitted in connection with the second drawbar () for pressing the valve needle () towards the closed position.